{"id":9450,"date":"2025-12-25T18:01:42","date_gmt":"2025-12-25T10:01:42","guid":{"rendered":"https:\/\/www.cncmachiningshops.com\/?p=9450"},"modified":"2026-01-01T10:24:18","modified_gmt":"2026-01-01T02:24:18","slug":"1018-steel","status":"publish","type":"post","link":"https:\/\/www.cncmachiningshops.com\/fr\/1018-steel\/","title":{"rendered":"Qu'est-ce que l'acier 1018 ? Propri\u00e9t\u00e9s, composition, applications et guide de s\u00e9lection technique"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:calc( 1280px + 80px );margin-left: calc(-80px \/ 2 );margin-right: calc(-80px \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:40px;--awb-margin-bottom-large:0px;--awb-spacing-left-large:40px;--awb-width-medium:100%;--awb-spacing-right-medium:40px;--awb-spacing-left-medium:40px;--awb-width-small:100%;--awb-spacing-right-small:40px;--awb-spacing-left-small:40px;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><div data-page-id=\"KNhedACkRoKtMkxYvGhcAVHMnaf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"true\">\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Lorsque les ing\u00e9nieurs et les fabricants ont besoin d'un mat\u00e9riau pr\u00e9visible, \u00e9conomique et compatible avec tout, ils choisissent g\u00e9n\u00e9ralement l'acier 1018. Le 1018 est un acier \u00e0 faible teneur en carbone (souvent appel\u00e9 acier doux). Il n'est pas choisi parce qu'il poss\u00e8de une propri\u00e9t\u00e9 extr\u00eame qui le distingue, mais parce qu'il offre un bon \u00e9quilibre entre usinabilit\u00e9, soudabilit\u00e9 et constance m\u00e9canique, r\u00e9pondant \u00e0 un large \u00e9ventail de besoins industriels.<\/span><\/p>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">En mati\u00e8re de fabrication, l'acier au carbone 1018 fonctionne bien pour l'usinage CNC, le per\u00e7age, le tournage et le fraisage. Sa faible teneur en carbone signifie que les copeaux se forment de mani\u00e8re stable, que les outils s'usent moins rapidement et que l'\u00e9tat de surface est bon sans n\u00e9cessiter d'outils sp\u00e9ciaux ni de param\u00e8tres de coupe agressifs. Parall\u00e8lement, il est facile \u00e0 souder avec des m\u00e9thodes courantes comme le MIG et le TIG, ce qui le rend adapt\u00e9 aux assemblages, aux cadres et aux pi\u00e8ces devant \u00eatre assembl\u00e9es apr\u00e8s usinage.<\/span><\/p>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Il est important de rappeler que le 1018 n'est pas un choix de mat\u00e9riau \u201c g\u00e9n\u00e9rique \u201d ou n\u00e9gligent. Les ing\u00e9nieurs le choisissent d\u00e9lib\u00e9r\u00e9ment lorsqu'ils n'ont pas besoin d'une r\u00e9sistance \u00e9lev\u00e9e, d'une duret\u00e9 extr\u00eame ou de performances d'alliage avanc\u00e9es. L'acier 1018 est mieux adapt\u00e9 aux arbres, supports, plaques et pi\u00e8ces structurelles o\u00f9 le contr\u00f4le des co\u00fbts, la constance dimensionnelle et l'efficacit\u00e9 de fabrication sont plus importants que les propri\u00e9t\u00e9s m\u00e9caniques maximales.<\/span><\/p>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Ce guide examine l'acier 1018 sous trois angles diff\u00e9rents : les bases du mat\u00e9riau, son comportement pendant la fabrication et la logique derri\u00e8re son choix pour les projets d'ing\u00e9nierie. Cela aidera les concepteurs, les ing\u00e9nieurs et les \u00e9quipes d'approvisionnement \u00e0 comprendre non seulement ce qu'il est, mais aussi quand et pourquoi il est pertinent de l'utiliser.<\/span><\/p>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Qu'est-ce que l'acier 1018 ? \u2014 Normes et d\u00e9finitions des nuances<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La nuance d'acier lamin\u00e9 \u00e0 froid la plus courante au monde est l'acier 1018. Le syst\u00e8me de classification des aciers au carbone AISI\/SAE en donne une d\u00e9finition.<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u201c 10 \u201d :<\/span><\/strong><span class=\"ng-star-inserted\"> Cela signifie que l'acier est un acier au carbone ordinaire et ne contient aucun \u00e9l\u00e9ment d'alliage majeur.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u201c 18 \u201d<\/span><\/strong><span class=\"ng-star-inserted\"> signifie que la teneur en carbone est d'environ 0,18%.<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 est d\u00e9finitivement un acier doux en raison de son niveau de carbone si faible. \u201c Acier doux \u201d ne signifie pas faible qualit\u00e9 dans le domaine de l'ing\u00e9nierie. Il fait plut\u00f4t r\u00e9f\u00e9rence aux aciers con\u00e7us pour rester ductiles, formables et soudables, contrairement aux nuances \u00e0 haute teneur en carbone, qui sont cassantes.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Normes mondiales et leurs \u00e9quivalents<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 est similaire \u00e0 ces normes pour l'approvisionnement international :<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">UNS :<\/span><\/strong><span class=\"ng-star-inserted\"> G10180<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">ASTM :<\/span><\/strong><span class=\"ng-star-inserted\"> A108 (Norme pour les barres d'acier finies \u00e0 froid, carbone et alliage)<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">EN \/ DIN :<\/span><\/strong><span class=\"ng-star-inserted\"> C15E \/ 1.1141<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">JIS :<\/span><\/strong><span class=\"ng-star-inserted\"> S15C ou S20C<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Perspectives techniques :<\/span><\/strong><span class=\"ng-star-inserted\"> Le 1018 diff\u00e8re des nuances d'acier structurel comme l'A36 car sa limite d'\u00e9lasticit\u00e9 est ce qui le d\u00e9finit. Cela facilite l'usinage de pi\u00e8ces \u00e0 tol\u00e9rances serr\u00e9es car son comportement est plus stable et pr\u00e9visible.<\/span><\/p>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La composition chimique de l'acier 1018 et ce qu'elle signifie pour l'ing\u00e9nierie<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pour comprendre pourquoi le 1018 se comporte comme il le fait, il faut conna\u00eetre la chimie. Il n\u00e9cessite une chimie \u201c propre \u201d avec peu d'impuret\u00e9s pour garantir que le traitement soit toujours identique.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Tableau 1 : Composition chimique courante (wt%)<\/span><\/strong><\/p>\n<div class=\"table-container ng-star-inserted\">\n<table>\n<tbody>\n<tr class=\"table-header ng-star-inserted\">\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u00c9l\u00e9ment<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Quantit\u00e9 moyenne<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Poste d'ing\u00e9nieur<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Carbone (C)<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">0.15\u20130.20<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le principal durcisseur. Maintenu \u00e0 un niveau bas pour garantir ductilit\u00e9 et soudabilit\u00e9.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Mangan\u00e8se (Mn)<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">0.60\u20130.90<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Augmente la trempabilit\u00e9 et la r\u00e9sistance \u00e0 la traction ; aide \u00e0 la d\u00e9soxydation.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Phosphore (P)<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u2264 0,040<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Impuret\u00e9. Maintenue \u00e0 un niveau bas pour \u00e9viter la fragilit\u00e9.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Soufre (S)<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u2264 0,050<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Impuret\u00e9. Maintenue \u00e0 un niveau bas pour pr\u00e9server la soudabilit\u00e9 (mais un peu plus de soufre aide \u00e0 l'usinage).<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Fer (Fe)<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Solde<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Base m\u00e9tallique.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pourquoi une faible teneur en carbone est importante<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La teneur en carbone de 0,18% est la zone \u201c id\u00e9ale \u201d pour la plupart des types de fabrication :<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Excellent pour le soudage :<\/span><\/strong><span class=\"ng-star-inserted\"> La faible teneur en carbone r\u00e9duit le risque de formation de martensite fragile dans la zone affect\u00e9e thermiquement (ZAT), donc aucun pr\u00e9chauffage n'est n\u00e9cessaire.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Il reste suffisamment ductile pour \u00eatre pli\u00e9, lamin\u00e9 ou refoul\u00e9 sans se rompre.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Potentiel de c\u00e9mentation :<\/span><\/strong><span class=\"ng-star-inserted\"> Il ne peut pas \u00eatre durci en profondeur (trempe et revenu), mais c'est un excellent candidat pour la c\u00e9mentation, qui cr\u00e9e une couche externe dure r\u00e9sistant \u00e0 l'usure tout en conservant un noyau r\u00e9sistant.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Qu'est-ce que la microstructure ferrite-perlite ?<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La microstructure de l'acier 1018 est la meilleure fa\u00e7on de comprendre son comportement d'un point de vue ing\u00e9nierie.<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">Le 1018 est compos\u00e9 des \u00e9l\u00e9ments suivants \u00e0 temp\u00e9rature ambiante :<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Ferrite :<\/span><\/strong><span class=\"ng-star-inserted\"> (Les grains clairs) Fer pur. Il est mou, flexible et magn\u00e9tique. C'est la majeure partie de la matrice.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Perlite :<\/span><\/strong><span class=\"ng-star-inserted\"> (Les grains sombres) Couches de c\u00e9mentite (carbure de fer) et de ferrite. Cela lui conf\u00e8re sa r\u00e9sistance.<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Il n'y a pas beaucoup de perlite car la teneur en carbone est faible. Cette structure, principalement compos\u00e9e de ferrite, explique pourquoi le 1018 est<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Facile \u00e0 usiner :<\/span><\/strong><span class=\"ng-star-inserted\"> La ferrite molle facilite la formation des copeaux.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Non fragile :<\/span><\/strong><span class=\"ng-star-inserted\"> Au lieu de se propager, les fissures ont tendance \u00e0 s'\u00e9mousser dans la ferrite molle.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Laminage \u00e0 froid vs. laminage \u00e0 chaud<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La m\u00e9thode de traitement affecte le fonctionnement de la structure des grains :<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Acier 1018 lamin\u00e9 \u00e0 chaud :<\/span><\/strong><span class=\"ng-star-inserted\"> Les grains sont tous de la m\u00eame taille (al\u00e9atoire). Moins de contraintes, mais plus de marge d'erreur sur les dimensions.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Acier 1018 \u00e9tir\u00e9 \u00e0 froid :<\/span><\/strong><span class=\"ng-star-inserted\"> Les grains s'allongent dans le sens de l'\u00e9tirage. Cet \u00e9crouissage augmente consid\u00e9rablement la limite d'\u00e9lasticit\u00e9 et la duret\u00e9 de surface, et rend les dimensions plus pr\u00e9cises (rectitude et diam\u00e8tre). Les barres \u00e9tir\u00e9es \u00e0 froid sont ce que la plupart des gens utilisent pour l'usinage.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Propri\u00e9t\u00e9s physiques de l'acier 1018<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Les ing\u00e9nieurs ne choisissent pas souvent le 1018 pour des pi\u00e8ces soumises \u00e0 de fortes contraintes. Il est choisi parce qu'il est fiable pour des applications \u00e0 contraintes faibles \u00e0 moyennes.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Valeurs courantes des propri\u00e9t\u00e9s m\u00e9caniques (\u00e9tir\u00e9 \u00e0 froid)<\/span><\/h3>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Tableau 2 : Propri\u00e9t\u00e9s m\u00e9caniques<\/span><\/strong><\/p>\n<div class=\"table-container ng-star-inserted\">\n<table>\n<tbody>\n<tr class=\"table-header ng-star-inserted\">\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Propri\u00e9t\u00e9<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Valeur (typique)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Interpr\u00e9tation technique<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">R\u00e9sistance \u00e0 la traction<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">~440\u2013485 MPa (64\u201370 ksi)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Suffisant pour un usage structurel g\u00e9n\u00e9ral.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Limite d'\u00e9lasticit\u00e9<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">~370 MPa (54 ksi)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">L'\u00e9crouissage le rend beaucoup plus r\u00e9sistant que le lamin\u00e9 \u00e0 chaud (environ 30 ksi).<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u00c9tirements<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">15\u201320%<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Bonne ductilit\u00e9 ; il se plie avant de se rompre.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Duret\u00e9<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">environ 126 HB (Brinell)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Assez doux pour \u00eatre usin\u00e9 \u00e0 tr\u00e8s haute vitesse.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Usinabilit\u00e9<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">environ 70 % (B1112 = 100 %)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">C'est ce que l'on consid\u00e8re comme la norme de \u201c bonne \u201d usinabilit\u00e9 dans l'acier.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Point de conception important :<\/span><\/strong><span class=\"ng-star-inserted\"> L'\u00e9tirage \u00e0 froid augmente la limite d'\u00e9lasticit\u00e9 de pr\u00e8s de 50 % par rapport au laminage \u00e0 chaud. Sp\u00e9cifiez toujours du 1018 fini \u00e0 froid (CF) si vous fabriquez un arbre qui doit r\u00e9sister \u00e0 la flexion.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Caract\u00e9ristiques physiques<\/span><\/h3>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Densit\u00e9 :<\/span><\/strong><span class=\"ng-star-inserted\"> 7,87 g\/cm\u00b3<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Module d'\u00e9lasticit\u00e9 :<\/span><\/strong><span class=\"ng-star-inserted\"> 200 GPa (29 000 ksi). Gardez \u00e0 l'esprit que le 1018 est aussi rigide que les aciers alli\u00e9s \u00e0 haute r\u00e9sistance. Changer la forme de l'acier ne r\u00e9duira pas la d\u00e9flexion ; seul l'utilisation d'un acier plus r\u00e9sistant le fera.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Facilit\u00e9 d'usinage et compatibilit\u00e9 avec le soudage<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Beaucoup de gens pensent que le 1018 est l'un des aciers les plus faciles \u00e0 travailler. C'est l'acier de r\u00e9f\u00e9rence auquel on compare les autres aciers.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pourquoi le 1018 est simple \u00e0 usiner<\/span><\/h3>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Formation de copeaux stable :<\/span><\/strong><span class=\"ng-star-inserted\"> La structure ferrite-perlite fait que les copeaux se cassent assez bien, mais ils peuvent \u00eatre \u201c collants \u201d par rapport aux aciers au plomb comme le 12L14.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Non abrasif :<\/span><\/strong><span class=\"ng-star-inserted\"> il n'use donc pas rapidement les outils. Les outils standard en acier rapide (HSS) ou en carbure non rev\u00eatu durent longtemps.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Constance :<\/span><\/strong><span class=\"ng-star-inserted\"> Contrairement \u00e0 l'A36, ce grade est chimiquement d\u00e9fini, donc les machinistes ne rencontrent pas de \u201c points durs \u201d dans le mat\u00e9riau.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Directives d'usinage CNC<\/span><\/h3>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Tournage :<\/span><\/strong><span class=\"ng-star-inserted\"> Fonctionne bien \u00e0 des vitesses moyennes. Si la finition se d\u00e9chire parce que le mat\u00e9riau est trop collant, augmentez la vitesse de surface (SFM) et assurez-vous que le rayon de bec d'outil est bien aff\u00fbt\u00e9.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Per\u00e7age :<\/span><\/strong><span class=\"ng-star-inserted\"> Il se perce tr\u00e8s facilement. Pour les trous profonds, il est pr\u00e9f\u00e9rable d'utiliser un per\u00e7age par \u00e0-coups pour \u00e9vacuer les copeaux qui reviennent.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Liquide de refroidissement :<\/span><\/strong><span class=\"ng-star-inserted\"> Un liquide de refroidissement hydrosoluble standard suffit pour maintenir la chaleur sous contr\u00f4le et \u00e9vacuer les copeaux.<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Note sur la stabilit\u00e9 dimensionnelle :<\/span><\/strong><span class=\"ng-star-inserted\"> Le 1018 \u00e9tir\u00e9 \u00e0 froid pr\u00e9sente des contraintes r\u00e9siduelles dues au processus d'\u00e9tirage. Si vous usinez une rainure de clavette dans un arbre long, l'arbre peut se d\u00e9former lorsque les contraintes sont lib\u00e9r\u00e9es. Pensez \u00e0 utiliser une barre d\u00e9tensionn\u00e9e ou \u00e0 tourner entre pointes pour les arbres n\u00e9cessitant une grande pr\u00e9cision.<\/span><\/p>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Points \u00e0 consid\u00e9rer pour le soudage et la fabrication<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 est \u201c l'ami du soudeur \u201d. Certains disent que c'est l'acier au carbone le plus soudable du march\u00e9.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pourquoi il adh\u00e8re si bien<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La faible teneur en carbone (&lt;0,20 %) emp\u00eache la zone de soudure de former de la martensite dure et fragile lors du refroidissement du m\u00e9tal.<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pr\u00e9chauffage :<\/span><\/strong><span class=\"ng-star-inserted\"> G\u00e9n\u00e9ralement pas n\u00e9cessaire pour les pi\u00e8ces de moins de 2 pouces d'\u00e9paisseur.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pas n\u00e9cessaire :<\/span><\/strong><span class=\"ng-star-inserted\"> Traitement thermique apr\u00e8s soudage (PWHT).<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Proc\u00e9d\u00e9s :<\/span><\/strong><span class=\"ng-star-inserted\"> Fonctionne tr\u00e8s bien pour le soudage MIG (GMAW), TIG (GTAW), \u00e0 l'\u00e9lectrode enrob\u00e9e (SMAW) et oxyac\u00e9tyl\u00e9nique.<\/span><\/p>\n<\/li>\n<\/ul>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Conseils de fabrication<\/span><\/h3>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Cintrage :<\/span><\/strong><span class=\"ng-star-inserted\"> Il est plus difficile de plier le 1018 \u00e9tir\u00e9 \u00e0 froid que le lamin\u00e9 \u00e0 chaud. Utilisez une barre lamin\u00e9e \u00e0 chaud ou recuite pour \u00e9viter que le rayon ext\u00e9rieur ne fissure lors de pliages \u00e0 rayon serr\u00e9.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le soudage ajoute de la chaleur<\/span><\/strong><span class=\"ng-star-inserted\">, ce qui modifie la forme. Un soudage intensif sur un seul c\u00f4t\u00e9 d'une plaque peut provoquer un gauchissement car le 1018 est souvent utilis\u00e9 sous des formes qui ne soulagent pas les contraintes.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Diff\u00e9rentes m\u00e9thodes de traitement thermique de l'acier 1018<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 ne peut pas \u00eatre \u201c durci \u201d de la mani\u00e8re habituelle (par trempe et revenu) pour obtenir un c\u0153ur r\u00e9sistant, mais c'est le meilleur mat\u00e9riau pour la c\u00e9mentation.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">C\u00e9mentation (durcissement de la couche superficielle)<\/span><\/h3>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 ne contient pas assez de carbone pour durcir par lui-m\u00eame, il faut donc ajouter du carbone \u00e0 la surface.<\/span><\/p>\n<ol class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Processus :<\/span><\/strong><span class=\"ng-star-inserted\"> Chauffez la pi\u00e8ce dans une atmosph\u00e8re riche en carbone. Le carbone se diffuse dans la couche externe de la surface.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Trempe :<\/span><\/strong><span class=\"ng-star-inserted\"> Refroidissez rapidement la pi\u00e8ce. La surface, qui contient beaucoup de carbone, devient tr\u00e8s dure (Rc 55-60), mais le c\u0153ur, qui contient moins de carbone, reste r\u00e9sistant et flexible.<\/span><\/p>\n<\/li>\n<\/ol>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Utilisation :<\/span><\/strong><span class=\"ng-star-inserted\"> Engrenages, goupilles et plaques d\u2019usure o\u00f9 une surface dure r\u00e9siste \u00e0 l\u2019usure et un c\u0153ur r\u00e9sistant emp\u00eache la pi\u00e8ce de se casser lors d\u2019un impact.<\/span><\/p>\n<h3 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Normalisation vs. Recuit<\/span><\/h3>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Recuit :<\/span><\/strong><span class=\"ng-star-inserted\"> Cela rend l\u2019acier aussi mou que possible pour le fa\u00e7onnage.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Normalisation :<\/span><\/strong><span class=\"ng-star-inserted\"> Rend la structure du grain plus homog\u00e8ne en l\u2019affinant. Cela est souvent effectu\u00e9 sur les pi\u00e8ces forg\u00e9es en 1018 pour garantir une usinage toujours constant.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Utilisations courantes de l\u2019acier 1018 dans la fabrication<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 est le \u201c joueur polyvalent \u201d des m\u00e9taux.<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Arbres et goupilles<\/span><\/strong><span class=\"ng-star-inserted\"> sont les utilisations les plus courantes des barres en 1018 \u00e9tir\u00e9 \u00e0 froid. Arbres pour pompes, moteurs et goupilles de positionnement.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Gabarits et montages :<\/span><\/strong><span class=\"ng-star-inserted\"> Ils sont beaucoup utilis\u00e9s dans les ateliers d\u2019usinage pour fabriquer des plaques de base, des brides et des blocs de r\u00e9glage.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Boulons \u00e0 faible r\u00e9sistance<\/span><\/strong><span class=\"ng-star-inserted\">, goujons et tirants sont des exemples de fixations.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Supports structurels :<\/span><\/strong><span class=\"ng-star-inserted\"> Supports de montage soud\u00e9s pour machines.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Pi\u00e8ces c\u00e9ment\u00e9es :<\/span><\/strong><span class=\"ng-star-inserted\"> Cliquets, engrenages et pignons bon march\u00e9.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Lequel choisir : acier 1018 ou A36 ?<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">C\u2019est l\u2019erreur la plus courante. L\u2019A36 est la norme pour les formes structurelles comme les poutres en I et les corni\u00e8res, tandis que le 1018 est la norme pour les barres.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Tableau 3 : Comparaison A36 vs. 1018<\/span><\/strong><\/p>\n<div class=\"table-container ng-star-inserted\">\n<table>\n<tbody>\n<tr class=\"table-header ng-star-inserted\">\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Fonctionnalit\u00e9<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">1018 Acier<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Acier A36<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">D\u00e9finition du choix Logique<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">D\u00e9finition<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Composition chimique<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La limite d\u2019\u00e9lasticit\u00e9 est une propri\u00e9t\u00e9 m\u00e9canique.<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 garantit la chimie, et l\u2019A36 garantit la r\u00e9sistance.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Finition de surface<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u00c9tir\u00e9 \u00e0 froid : lisse et brillant<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Rugueux et \u00e9cailleux (lamin\u00e9 \u00e0 chaud)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Utilisez le 1018 pour les pi\u00e8ces n\u00e9cessitant de la pr\u00e9cision ou visibles.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Usinabilit\u00e9<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Coh\u00e9rente, bonne<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Incoh\u00e9rente (\u201c points durs \u201d)<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Utilisez le 1018 pour les pi\u00e8ces CNC.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Disponibilit\u00e9 des formes<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Barre, tige, fil<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Plaque, poutre et corni\u00e8re<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">L\u2019A36 est le type de forme structurelle le plus courant.<\/span><\/td>\n<\/tr>\n<tr class=\"ng-star-inserted\">\n<td class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Prix<\/span><\/strong><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Un peu plus \u00e9lev\u00e9<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le plus bas<\/span><\/td>\n<td class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">L\u2019A36 est l\u2019acier pour la construction en gros.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">La r\u00e8gle pour prendre une d\u00e9cision :<\/span><\/strong><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Usinez-vous une pi\u00e8ce n\u00e9cessitant une grande pr\u00e9cision, comme un arbre ou un boulon ? -&gt; <\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Choisissez le 1018.<\/span><\/strong><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Soudez-vous une table ou un cadre de b\u00e2timent ? -&gt; <\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Choisissez l\u2019A36.<\/span><\/strong><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Quand ne pas utiliser l\u2019acier 1018 : limites de conception<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Le 1018 est flexible, mais il a ses limites.<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Haute r\u00e9sistance requise :<\/span><\/strong><span class=\"ng-star-inserted\"> Si vous avez besoin d\u2019une limite d\u2019\u00e9lasticit\u00e9 \u00e9lev\u00e9e sans trop de volume, passez au 1045 (acier \u00e0 moyen carbone) ou au 4140 (acier alli\u00e9). Le 1018 se d\u00e9formera simplement.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Trempe \u00e0 c\u0153ur :<\/span><\/strong><span class=\"ng-star-inserted\"> Le 1018 ne peut pas durcir toute la pi\u00e8ce, seulement la surface. Utilisez de l\u2019acier \u00e0 outils ou du 4140.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">R\u00e9sistance \u00e0 la corrosion :<\/span><\/strong><span class=\"ng-star-inserted\"> Le 1018 rouille imm\u00e9diatement dans des conditions humides. Si vous ne pouvez pas le peindre ou le plaquer, utilisez de l\u2019acier inoxydable 304 ou de l\u2019aluminium \u00e0 la place.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Charges de fatigue \u00e9lev\u00e9es :<\/span><\/strong><span class=\"ng-star-inserted\"> Le 1018 n\u2019est pas un bon choix pour les pi\u00e8ces cycliques soumises \u00e0 de fortes contraintes (comme les vilebrequins) car il a moins de r\u00e9sistance et plus d\u2019impuret\u00e9s.<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">R\u00e9sum\u00e9 : Ce que les ing\u00e9nieurs doivent savoir sur l\u2019acier 1018<\/span><\/h2>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">L\u2019acier 1018 est la norme s\u00fbre et \u00e9conomique pour la conception m\u00e9canique.<\/span><\/p>\n<ul class=\"ng-star-inserted\">\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Usinabilit\u00e9 :<\/span><\/strong><span class=\"ng-star-inserted\"> C\u2019est la norme pour le tournage et le fraisage CNC fiable.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Fabrication :<\/span><\/strong><span class=\"ng-star-inserted\"> Il est facile \u00e0 souder sans \u00e9tapes compliqu\u00e9es.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Durcissement de surface :<\/span><\/strong><span class=\"ng-star-inserted\"> La c\u00e9mentation produit des pi\u00e8ces tr\u00e8s r\u00e9sistantes \u00e0 l\u2019usure.<\/span><\/p>\n<\/li>\n<li class=\"ng-star-inserted\">\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Prix :<\/span><\/strong><span class=\"ng-star-inserted\"> C\u2019est l\u2019un des m\u00e9taux les moins chers que vous puissiez acheter.<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Meilleure pratique :<\/span><\/strong><span class=\"ng-star-inserted\"> Pour les arbres, les axes et autres pi\u00e8ces usin\u00e9es, utilisez la barre \u00e9tir\u00e9e \u00e0 froid 1018. Utilisez le 1018 lamin\u00e9 \u00e0 chaud uniquement si l\u2019\u00e9tat de surface n\u2019a pas d\u2019importance ou si vous pr\u00e9voyez beaucoup de soudage. Si vous avez besoin de plus de r\u00e9sistance, utilisez du 1045 ou du 4140.<\/span><\/p>\n<h2 class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">FAQ<\/span><\/h2>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Q : Peut-on souder l\u2019acier 1018 ?<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">R : Oui, tr\u00e8s bien. Gr\u00e2ce \u00e0 sa faible teneur en carbone, c\u2019est l\u2019un des aciers les plus faciles \u00e0 souder. Pour la plupart des usages, il n\u2019a pas besoin d\u2019\u00eatre pr\u00e9chauff\u00e9 ou trait\u00e9 apr\u00e8s soudage.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Q : L\u2019acier 1018 rouille-t-il ?<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">R : Oui, tr\u00e8s rapidement. Il ne r\u00e9siste pas \u00e0 la rouille. Pour l\u2019emp\u00eacher de rouiller, il doit \u00eatre peint, rev\u00eatu par poudre, zingu\u00e9 ou huil\u00e9.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Q : Quelle est la diff\u00e9rence entre le 1018 et le 1045 ?<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">R : La teneur en carbone. Il y a environ 0,18% de carbone dans le 1018 et environ 0,45% de carbone dans le 1045. Le 1045 est plus r\u00e9sistant et peut \u00eatre durci \u00e0 c\u0153ur, mais il est plus difficile \u00e0 souder et \u00e0 usiner.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Q : Est-il possible de durcir l\u2019acier 1018 ?<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">R : Vous ne pouvez pas le tremper \u00e0 c\u0153ur (trempe et revenu) car il n\u2019a pas assez de carbone. Vous pouvez uniquement le c\u00e9menter (carburation) pour durcir l\u2019ext\u00e9rieur tout en gardant l\u2019int\u00e9rieur souple.<\/span><\/p>\n<p class=\"ng-star-inserted\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Q : Le 1018 est-il meilleur que l\u2019A36 ?<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">R : Oui, le 1018 est plus propre et plus constant pour l\u2019usinage. L\u2019A36 est g\u00e9n\u00e9ralement moins cher et suffisant pour le soudage structurel, comme la fabrication d\u2019un rack.<\/span><\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Lorsque les ing\u00e9nieurs et les fabricants ont besoin d'un mat\u00e9riau pr\u00e9visible, \u00e9conomique et compatible avec tout, ils choisissent g\u00e9n\u00e9ralement l'acier 1018.<\/p>","protected":false},"author":1,"featured_media":9621,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103],"tags":[],"class_list":["post-9450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-guide"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.5 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>1018 Steel Explained: Composition, Properties &amp; Selection Guide<\/title>\n<meta name=\"description\" content=\"Learn 1018 steel composition, mechanical properties, weldability, and common engineering applications, with guidance on when to choose it over other carbon steels.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cncmachiningshops.com\/fr\/1018-steel\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is 1018 Steel? 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