{"id":57066,"date":"2026-01-28T06:00:50","date_gmt":"2026-01-28T06:00:50","guid":{"rendered":"https:\/\/www.kaysuns.com\/?post_type=blog&#038;p=57066"},"modified":"2026-02-02T03:10:59","modified_gmt":"2026-02-02T03:10:59","slug":"difference-entre-ss-304-et-430","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/difference-entre-ss-304-et-430\/","title":{"rendered":"Quelle est la diff\u00e9rence entre l'acier inoxydable 304 et 430 ?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"57066\" class=\"elementor elementor-57066\" data-elementor-post-type=\"blog\">\n\t\t\t\t<div class=\"elementor-element elementor-element-814114c e-flex e-con-boxed e-con e-parent\" data-id=\"814114c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a83ad66 elementor-widget elementor-widget-text-editor\" data-id=\"a83ad66\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<strong>304 et 430<\/strong> Les aciers inoxydables poss\u00e8dent des compositions chimiques distinctes, qui d\u00e9terminent leurs performances dans diff\u00e9rents environnements. Le choix d'une mauvaise qualit\u00e9 peut entra\u00eener une corrosion rapide ou une d\u00e9faillance m\u00e9canique.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c70e418 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c70e418\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a4be266\" data-id=\"a4be266\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5cdcc27 elementor-widget elementor-widget-heading\" data-id=\"5cdcc27\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 aust\u00e9nitique VS 430 ferritique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54fa715 elementor-widget elementor-widget-text-editor\" data-id=\"54fa715\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLa diff\u00e9rence la plus importante entre le 304 et le 430 r\u00e9side dans leur structure cristalline.L'acier inoxydable 304 appartient \u00e0 la famille \u201caust\u00e9nitique\u201d, o\u00f9 sa teneur \u00e9lev\u00e9e en nickel modifie l'arrangement atomique, ce qui rend le m\u00e9tal non magn\u00e9tique et tr\u00e8s ductile.Cette structure lui permet d'exceller dans des temp\u00e9ratures extr\u00eames et des environnements \u00e0 haute pression.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3cf90c6 elementor-widget elementor-widget-text-editor\" data-id=\"3cf90c6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tEn revanche, l'acier inoxydable 430 est un alliage \u201cferritique\u201d. Il contient du chrome mais moins de nickel, ce qui le rend magn\u00e9tique et similaire \u00e0 l'acier au carbone. Alors que le 430 excelle dans des applications sp\u00e9cifiques, son adaptabilit\u00e9 structurelle n'est pas \u00e0 la hauteur de celle du 304.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fede7d1 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fede7d1\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6bf484c\" data-id=\"6bf484c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5da1f99 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"5da1f99\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ce que nous faisons<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85fccb6 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"85fccb6\" data-element_type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Plaque<\/li><li>Feuille<\/li><li>Forgeage<\/li><li>Barre ronde<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1e91e3 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"c1e91e3\" data-element_type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Bride<\/li><li>Tuyaux<\/li><li>Raccords<\/li><li>Sur mesure<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2686e2c\" data-id=\"2686e2c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-da8fd47 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"da8fd47\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Contactez-nous pour plus d'informations\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2dda1fa elementor-align-center elementor-mobile-align-center elementor-widget__width-initial elementor-widget elementor-widget-button\" data-id=\"2dda1fa\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\" id=\"#241018\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Nous contacter<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8caa9b4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8caa9b4\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aca1624\" data-id=\"aca1624\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-adfde31 elementor-widget elementor-widget-heading\" data-id=\"adfde31\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 et 430 : Composition chimique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-51f09ea elementor-widget elementor-widget-text-editor\" data-id=\"51f09ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLa \u201crecette\u201d chimique de 304 et 430 a un impact direct sur leur capacit\u00e9 \u00e0 r\u00e9sister \u00e0 la rouille. Le grade 304 comprend g\u00e9n\u00e9ralement 18% de chrome et 8% de nickel. Cette combinaison cr\u00e9e une couche passive tr\u00e8s stable sur la surface du m\u00e9tal.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69e26f2 elementor-widget elementor-widget-text-editor\" data-id=\"69e26f2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLe grade 430 contient g\u00e9n\u00e9ralement 16% \u00e0 18% de chrome mais presque pas de nickel (moins de 0,75%).Sans nickel,le film d'oxyde protecteur est moins robuste.Cela rend le 430 plus sensible \u00e0 la piq\u00fbre dans les environnements humides ou sal\u00e9s.Par cons\u00e9quent,la plupart des syst\u00e8mes de tuyauterie industrielle pr\u00e9f\u00e8rent le 304 pour une fiabilit\u00e9 \u00e0 long terme.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cfb0b5e elementor-widget elementor-widget-heading\" data-id=\"cfb0b5e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Comparaison de la composition chimique<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab475c1 elementor-widget elementor-widget-text-editor\" data-id=\"ab475c1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>\u00c9l\u00e9ment (%)<\/th>\n<th>Grade 304<\/th>\n<th>Note 430<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Cr<\/td>\n<td>18,0 \u2013 20,0<\/td>\n<td>16,0 \u2013 18,0<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Ni<\/td>\n<td>8,0 \u2013 10,5<\/td>\n<td>0.75 Max<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Mn<\/td>\n<td>2.0 Max<\/td>\n<td>1.0 Max<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">C<\/td>\n<td>0,08 Max<\/td>\n<td>0.12 Max<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Fe<\/td>\n<td>\u00c9quilibre<\/td>\n<td>\u00c9quilibre<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">C<\/td>\n<td>0,08 Max<\/td>\n<td>0.12 Max<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-d5c79b1 e-flex e-con-boxed e-con e-parent\" data-id=\"d5c79b1\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-68bba46 elementor-widget elementor-widget-heading\" data-id=\"68bba46\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 et 430 : Propri\u00e9t\u00e9s m\u00e9caniques<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6869d6d elementor-widget elementor-widget-text-editor\" data-id=\"6869d6d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Biens<\/th>\n<th>Grade 304<\/th>\n<th>Note 430<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">R\u00e9sistance \u00e0 la traction, min.<\/td>\n<td>75 ksi (515 MPa)<\/td>\n<td>65 ksi (450 MPa)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Limite d'\u00e9lasticit\u00e9 (0.2%), min.<\/td>\n<td>30 ksi (205 MPa)<\/td>\n<td>30 ksi (205 MPa)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Allongement (en 2in ou 50mm), min.<\/td>\n<td>40%<\/td>\n<td>22%<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Duret\u00e9, max.<\/td>\n<td>92 HRB (201 HBW)<\/td>\n<td>89 HRB (183 HBW)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c43c579 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c43c579\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-efd48e6\" data-id=\"efd48e6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9cc82f6 elementor-widget elementor-widget-heading\" data-id=\"9cc82f6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 et 430 : le score PREN<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d998935 elementor-widget elementor-widget-text-editor\" data-id=\"d998935\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Pour aller au-del\u00e0 des descriptions g\u00e9n\u00e9rales, les ing\u00e9nieurs utilisent souvent l'expression <a href=\"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-la-prenatalite\/\" target=\"_blank\" rel=\"noopener\">Indice \u00e9quivalent de r\u00e9sistance \u00e0 la piq\u00fbre (PREN)<\/a> Comme le grade 304 contient souvent des traces d'azote et un taux de chrome plus \u00e9lev\u00e9, son score PREN est syst\u00e9matiquement plus \u00e9lev\u00e9 que celui du grade 430.<br \/>La valeur PREN pour l'acier inoxydable 304 est <strong>18-20<\/strong>,tandis que celle de l'acier inoxydable 430 est de <strong>16-18<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e787d3a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e787d3a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f6c4f2f\" data-id=\"f6c4f2f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b26b8f4 elementor-widget elementor-widget-heading\" data-id=\"b26b8f4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 et 430 : Performance des syst\u00e8mes de tuyauterie<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-608553a elementor-widget elementor-widget-heading\" data-id=\"608553a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Application de la nuance 304<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-abb49bd elementor-widget elementor-widget-text-editor\" data-id=\"abb49bd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tNous s\u00e9lectionnons le mat\u00e9riau Grade 304 pour la grande majorit\u00e9 de nos produits. <a href=\"https:\/\/www.kaysuns.com\/fr\/raccords-de-tuyauterie-en-acier-inoxydable\/\" target=\"_blank\" rel=\"noopener\">raccords de tuyauterie en acier inoxydable<\/a> Sa soudabilit\u00e9 et sa r\u00e9sistance exceptionnelles en font un choix id\u00e9al pour les canalisations chimiques \u00e0 haute pression.Ce mat\u00e9riau conserve son int\u00e9grit\u00e9 dans les environnements \u00e0 basse temp\u00e9rature et r\u00e9siste \u00e0 la corrosion caus\u00e9e par la plupart des acides oxydants.Pour les syst\u00e8mes transportant de l'eau, des aliments ou des produits chimiques, le mat\u00e9riau de grade 304 est le choix standard de l'industrie.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1277cbc elementor-widget elementor-widget-heading\" data-id=\"1277cbc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Application de la classe 430<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-84740b6 elementor-widget elementor-widget-text-editor\" data-id=\"84740b6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tL'acier inoxydable 430 est plus couramment utilis\u00e9 dans les composants de tuyauterie int\u00e9rieure ou d\u00e9corative, tels que les conduits d'\u00e9vacuation des cuisines ou les pi\u00e8ces de garniture des appareils \u00e9lectrom\u00e9nagers.En raison de l'absence de nickel, il est nettement moins cher que l'acier 304.Toutefois, comme il devient cassant \u00e0 basse temp\u00e9rature et qu'il est difficile \u00e0 souder sans traitement thermique sp\u00e9cial, ce mat\u00e9riau est rarement utilis\u00e9 dans les syst\u00e8mes de tuyauterie en acier inoxydable \u00e0 haute pression.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-19879dc e-flex e-con-boxed e-con e-parent\" data-id=\"19879dc\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18c910f elementor-cta--layout-image-right elementor-cta--mobile-layout-image-above elementor-cta--skin-classic elementor-animated-content elementor-widget elementor-widget-call-to-action\" data-id=\"18c910f\" data-element_type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/01\/What-is-The-Difference-Between-Stainless-Steel-304-And-430-CTA-scaled-e1769579883358.webp);\" role=\"img\" aria-label=\"Quelle est la diff\u00e9rence entre l&#039;acier inoxydable 304 et 430 - CTA\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h2 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tN'h\u00e9sitez pas \u00e0 nous contacter\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tKAYSUNS propose des solutions globales pour les mat\u00e9riaux de tuyauterie tels que les tuyaux, les raccords, les brides, les vannes, les plaques, les pi\u00e8ces forg\u00e9es, les lingots d'acier inoxydable, d'acier duplex et d'acier alli\u00e9, toutes sortes d'\u00e9l\u00e9ments de fixation (boulons, \u00e9crous, rondelles plates, rondelles bomb\u00e9es) et d'autres produits. Nous acceptons un service personnalis\u00e9 pour nos produits et certains d'entre eux peuvent \u00eatre fournis en petites quantit\u00e9s. Si vous avez des questions sur notre soci\u00e9t\u00e9 et nos produits, n'h\u00e9sitez pas \u00e0 nous contacter.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t<span class=\"elementor-cta__button elementor-button elementor-size-\">\n\t\t\t\t\t\tObtenir un devis\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e7d8e86 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e7d8e86\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aae8bbb\" data-id=\"aae8bbb\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6c12344 elementor-widget elementor-widget-heading\" data-id=\"6c12344\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">304 et 430 : d\u00e9fis en mati\u00e8re de soudage et de fabrication<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c34d1c0 elementor-widget elementor-widget-text-editor\" data-id=\"c34d1c0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLe soudage de ces deux qualit\u00e9s diff\u00e9rentes d'acier inoxydable requiert des comp\u00e9tences sp\u00e9cialis\u00e9es distinctes. L'acier inoxydable 304 est r\u00e9put\u00e9 pour son excellente soudabilit\u00e9, ne n\u00e9cessitant ni pr\u00e9chauffage ni refroidissement complexe apr\u00e8s soudage. <a href=\"https:\/\/www.kaysuns.com\/fr\/bride-en-acier-inoxydable\/\" target=\"_blank\" rel=\"noopener\">Bride en acier inoxydable 304<\/a> \u00e0 l'aide de m\u00e9thodes de soudage TIG (gaz inerte de tungst\u00e8ne) ou MIG (gaz inerte m\u00e9tallique) standard.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9596187 elementor-widget elementor-widget-text-editor\" data-id=\"9596187\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tCependant, le soudage de l'acier inoxydable 430 est beaucoup plus difficile.La chaleur g\u00e9n\u00e9r\u00e9e par l'arc \u00e9lectrique provoque la croissance des grains de m\u00e9tal, ce qui entra\u00eene des soudures faibles et fragiles.Si le soudage de l'acier inoxydable 430 est n\u00e9cessaire, il doit g\u00e9n\u00e9ralement \u00eatre pr\u00e9chauff\u00e9 \u00e0 150\u00b0C. M\u00eame dans ce cas, la soudure risque de ne pas r\u00e9sister \u00e0 des contraintes m\u00e9caniques \u00e9lev\u00e9es. M\u00eame dans ce cas, la soudure risque de ne pas r\u00e9sister \u00e0 des contraintes m\u00e9caniques \u00e9lev\u00e9es. Pour garantir la solidit\u00e9 d'une bride, les professionnels optent presque toujours pour l'acier inoxydable 304.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a52e546 elementor-widget elementor-widget-heading\" data-id=\"a52e546\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Guide de s\u00e9lection pratique pour les ing\u00e9nieurs<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e663c1 elementor-widget elementor-widget-text-editor\" data-id=\"3e663c1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Biens<\/th>\n<th>Grade 304<\/th>\n<th>Note 430<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td>Excellent (\u00e9lev\u00e9)<\/td>\n<td>Mod\u00e9r\u00e9 (faible)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Soudabilit\u00e9<\/td>\n<td>Remarquable<\/td>\n<td>M\u00e9diocre \/ difficile<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Co\u00fbt<\/td>\n<td>Plus \u00e9lev\u00e9 (en raison du nickel)<\/td>\n<td>Plus bas (\u00e9conomique)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Cas d'utilisation id\u00e9al<\/td>\n<td>Tuyauteries et brides<\/td>\n<td>Environnement d\u00e9coratif et sec<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e0e2c9 elementor-widget elementor-widget-text-editor\" data-id=\"8e0e2c9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLe mat\u00e9riau de grade 304 pr\u00e9sente un taux d'allongement d'environ 40%, ce qui lui permet d'\u00eatre pli\u00e9 dans des formes complexes sans se fissurer. En revanche, le mat\u00e9riau de grade 430 pr\u00e9sente une ductilit\u00e9 nettement inf\u00e9rieure (environ 20%). \u00c0 basse temp\u00e9rature, les raccords de tuyauterie de grade 430 deviennent cassants, ce qui pr\u00e9sente un risque de \u201cfissuration sous contrainte\u201d dans les syst\u00e8mes de tuyauterie soumis \u00e0 de fortes vibrations.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cfad243 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cfad243\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-121d2b8\" data-id=\"121d2b8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cd5ad62 elementor-widget elementor-widget-heading\" data-id=\"cd5ad62\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">R\u00e9sistance \u00e0 la corrosion : piq\u00fbres et oxydation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e145647 elementor-widget elementor-widget-text-editor\" data-id=\"e145647\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tLorsque vous comparez 304 et 430, vous devez tenir compte de la \u201cr\u00e9sistance aux piq\u00fbres\u201d. Le grade 304 supporte beaucoup mieux les ions chlorure (comme le sel) que le grade 430. Si un tuyau en 430 reste dans un environnement humide ou sal\u00e9, il d\u00e9veloppera rapidement de petites taches de rouille.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9752d37 elementor-widget elementor-widget-text-editor\" data-id=\"9752d37\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tGr\u00e2ce \u00e0 sa teneur en nickel, l'acier inoxydable 304 conserve un film d'oxyde r\u00e9silient et auto-cicatrisant.Cela signifie que m\u00eame en cas de rayures superficielles, le tuyau peut se r\u00e9parer instantan\u00e9ment.Pour les infrastructures critiques, cette capacit\u00e9 d\u201c\u201dauto-cicatrisation\" compense suffisamment le co\u00fbt suppl\u00e9mentaire.Elle permet d'\u00e9viter les fuites dangereuses tout en prolongeant la dur\u00e9e de vie de l'ensemble du r\u00e9seau de pipelines.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-34f20e0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"34f20e0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-529ea98\" data-id=\"529ea98\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cd7a2b5 elementor-widget elementor-widget-heading\" data-id=\"cd7a2b5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title 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