{"id":49709,"date":"2025-05-20T06:54:51","date_gmt":"2025-05-20T06:54:51","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=49709"},"modified":"2025-07-01T06:12:08","modified_gmt":"2025-07-01T06:12:08","slug":"1-7709-acier-crucial-pour-les-raccords-de-tuyauterie-a-haute-performance","status":"publish","type":"post","link":"https:\/\/www.kaysuns.com\/fr\/1-7709-acier-crucial-pour-les-raccords-de-tuyauterie-a-haute-performance\/","title":{"rendered":"Le pouvoir d'achat : Pourquoi l'acier 1.7709 (21CrMoV5-7) est essentiel pour les tuyaux et les raccords \u00e0 haute performance"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"49709\" class=\"elementor elementor-49709\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ee6c201 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ee6c201\" 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-b5c3d20\" data-id=\"b5c3d20\" 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-4dba0a1 elementor-widget elementor-widget-heading\" data-id=\"4dba0a1\" 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\">Comprendre l'acier 1.7709<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b0ad0c elementor-widget elementor-widget-text-editor\" data-id=\"9b0ad0c\" 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>Qu'est-ce que l'acier 1.7709 ? Connu sous sa d\u00e9signation standard europ\u00e9enne 21CrMoV5-7, ce mat\u00e9riau est un acier alli\u00e9 tremp\u00e9 et revenu. Il est strictement conforme \u00e0 la norme EN 10269-2006. Cette norme couvre sp\u00e9cifiquement les aciers pour fixations utilis\u00e9s \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es et basses. Sa r\u00e9sistance principale provient d'\u00e9l\u00e9ments d'alliage tels que le chrome (Cr), <a href=\"https:\/\/www.kaysuns.com\/fr\/role-du-molybdene-dans-les-tubes-et-raccords-en-acier-inoxydable\/\" target=\"_blank\" rel=\"noopener\">Molybd\u00e8ne<\/a> (Mo) et du vanadium (V). Un processus de traitement thermique contr\u00f4l\u00e9, connu sous le nom de trempe et de revenu, optimise ses propri\u00e9t\u00e9s. Il permet d'\u00e9quilibrer efficacement la r\u00e9sistance, la ductilit\u00e9 et la t\u00e9nacit\u00e9. La densit\u00e9 de cet alliage est de 7,85 g\/cm\u00b3. Les entreprises utilisent largement ce mat\u00e9riau pour les fixations critiques telles que les boulons et les \u00e9crous. Ceux-ci sont essentiels dans les secteurs de l'\u00e9nergie, de l'a\u00e9rospatiale et des industries lourdes. Le 1.7709 est fiable jusqu'\u00e0 540\u00b0C.<\/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-9ea7a50 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9ea7a50\" 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-414152b\" data-id=\"414152b\" 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-7e70274 elementor-widget elementor-widget-heading\" data-id=\"7e70274\" 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\">Avantages principaux de 1.7709<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b346dd1 elementor-widget elementor-widget-accordion\" data-id=\"b346dd1\" data-element_type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1871\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1871\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Haute r\u00e9sistance et t\u00e9nacit\u00e9 \u00e9quilibr\u00e9es<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1871\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1871\"><p>L'acier 1.7709 offre une combinaison essentielle de haute r\u00e9sistance \u00e0 la traction (700-1220 MPa) et d'une excellente r\u00e9sistance aux chocs (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">63<\/span><span class=\"mord mathnormal\">J<\/span><\/span><\/span><\/span><\/span> \u00e0 temp\u00e9rature ambiante). Cela vaut pour des sections d'une \u00e9paisseur allant jusqu'\u00e0 250 mm apr\u00e8s le traitement thermique. Cet \u00e9quilibre garantit l'int\u00e9grit\u00e9 des composants sous des charges \u00e9lev\u00e9es.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1872\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1872\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Fiabilit\u00e9 exceptionnelle \u00e0 haute temp\u00e9rature<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1872\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1872\"><p>Pour les syst\u00e8mes fonctionnant jusqu'\u00e0 540\u00b0C, le 1.7709 conserve une r\u00e9sistance critique (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">350<\/span><span class=\"mord mathnormal\">MP<\/span><span class=\"mord mathnormal\">une<\/span><\/span><\/span><\/span><\/span>). Il forme une couche d'oxyde Cr\u2082O\u2083 dense \u00e0 sa surface. Cela lui conf\u00e8re une r\u00e9sistance importante au fluage et \u00e0 l'oxydation. Ceci est crucial pour les performances \u00e0 long terme dans les environnements chauds, souvent pr\u00e9sents dans les syst\u00e8mes de tuyauterie en acier inoxydable.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1873\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1873\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">R\u00e9silience \u00e9prouv\u00e9e \u00e0 basse temp\u00e9rature<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1873\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1873\"><p>M\u00eame dans des conditions de gel allant jusqu'\u00e0 -40\u00b0C, le 1.7709 conserve une importante r\u00e9sistance aux chocs (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">27<\/span><span class=\"mord mathnormal\">J<\/span><\/span><\/span><\/span><\/span>). Cette t\u00e9nacit\u00e9 \u00e0 basse temp\u00e9rature permet d'\u00e9viter les ruptures fragiles. Elle permet au mat\u00e9riau de convenir \u00e0 des applications critiques dans des climats divers ou \u00e0 des syst\u00e8mes cryog\u00e9niques adjacents raccord\u00e9s \u00e0 des tuyaux en acier inoxydable.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1874\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1874\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Traitement adaptable pour la fabrication<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1874\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1874\"><p>Il est plus facile de s'approvisionner en 1.7709 lorsqu'il fonctionne bien dans la fabrication. Il offre de bonnes propri\u00e9t\u00e9s de d\u00e9formation \u00e0 froid avec une duret\u00e9 recuite inf\u00e9rieure \u00e0 197 HB. Cela convient \u00e0 l'usinage de pr\u00e9cision et \u00e0 la frappe \u00e0 froid. Alors que le soudage n\u00e9cessite un pr\u00e9chauffage (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">200-25<\/span><span class=\"mord\">0<span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mbin mtight\">\u2218<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">C<\/span><\/span><\/span><\/span><\/span>), l'utilisation d'\u00e9lectrodes \u00e0 faible teneur en hydrog\u00e8ne permet d'\u00e9viter la fissuration thermique. Cette adaptabilit\u00e9 simplifie les processus de fabrication.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\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-aee5dcb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"aee5dcb\" 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-fabacf6\" data-id=\"fabacf6\" 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-fdfa0d5 elementor-widget elementor-widget-heading\" data-id=\"fdfa0d5\" 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\">Composition chimique de 1.7709<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1302fe elementor-widget elementor-widget-text-editor\" data-id=\"f1302fe\" 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>C<\/th>\n<th>Si<\/th>\n<th>Mn<\/th>\n<th>P<\/th>\n<th>S<\/th>\n<th>Cr<\/th>\n<th>Mo<\/th>\n<th>Ni<\/th>\n<th>V<\/th>\n<th>Cu<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Contenu (%)<\/td>\n<td>0.17-0.23<\/td>\n<td>\u22640.40<\/td>\n<td>0.40-0.70<\/td>\n<td>\u22640.025<\/td>\n<td>\u22640.015<\/td>\n<td>1.20-1.50<\/td>\n<td>0.60-0.80<\/td>\n<td>\u22640.30<\/td>\n<td>0.10-0.20<\/td>\n<td>\u22640.30<\/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\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-39398b6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"39398b6\" 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-9ebe9ad\" data-id=\"9ebe9ad\" 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-b0bce62 elementor-widget elementor-widget-heading\" data-id=\"b0bce62\" 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\">Applications typiques : O\u00f9 1.7709 convient<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a8e542 elementor-widget elementor-widget-text-editor\" data-id=\"3a8e542\" 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>L'acier 1.7709 est sp\u00e9cifi\u00e9 lorsque la d\u00e9faillance n'est pas envisageable. Bien qu'il ne soit pas typiquement form\u00e9 <em>en<\/em> Les tuyaux ou les raccords standard eux-m\u00eames, sa r\u00e9sistance est indispensable pour les fixations qui doivent \u00eatre utilis\u00e9es dans le cadre d'un projet de construction. <em>relier<\/em> des syst\u00e8mes de tuyaux et de raccords en acier inoxydable \u00e0 haute performance.<\/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-8c804a4 elementor-widget elementor-widget-text-editor\" data-id=\"8c804a4\" 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<ul><li data-sourcepos=\"48:1-48:328\"><strong>\u00c9nergie et \u00e9lectricit\u00e9 :<\/strong> Les boulons et \u00e9crous haute temp\u00e9rature en 1.7709 sont essentiels. Ils sont utilis\u00e9s pour raccorder des composants dans les turbines \u00e0 gaz, les syst\u00e8mes \u00e0 vapeur supercritique et les centrales nucl\u00e9aires. Ils peuvent r\u00e9sister \u00e0 des temp\u00e9ratures allant jusqu'\u00e0 540\u00b0C et \u00e0 des pressions allant jusqu'\u00e0 275 MPa. Fixations importantes pour les raccords de tuyauterie dans les environnements de refroidissement nucl\u00e9aire.<\/li><li data-sourcepos=\"49:1-49:306\"><strong>Machines lourdes et traitement chimique :<\/strong> Les boulons en 1.7709 s\u00e9curisent les r\u00e9acteurs \u00e0 haute pression. Ils r\u00e9sistent \u00e0 la corrosion due au soufre et au chlore. Cela permet de r\u00e9duire <a href=\"https:\/\/www.kaysuns.com\/fr\/fissuration-par-corrosion-sous-contrainte-dans-lacier-inoxydable\/\" target=\"_blank\" rel=\"noopener\">fissuration par corrosion sous contrainte<\/a> risque. Les composants des chaudi\u00e8res, comme les rotors des turbines \u00e0 vapeur ou les boulons de raccordement, subissent des cycles et des charges thermiques importants.<\/li><li data-sourcepos=\"50:1-51:0\"><strong>A\u00e9rospatiale :<\/strong> Les fixations de moteurs exigent une fiabilit\u00e9 extr\u00eame. Le 1.7709 conserve une grande int\u00e9grit\u00e9 sous des charges dynamiques. Il fonctionne dans une large gamme de temp\u00e9ratures (de -50\u00b0C \u00e0 540\u00b0C). Ces fixations sont essentielles dans les assemblages complexes, notamment les conduites de carburant ou les conduites hydrauliques pour lesquelles des tubes en acier inoxydable sp\u00e9cialis\u00e9s sont souvent utilis\u00e9s.<\/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\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4b2e462 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4b2e462\" 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-ab9acd8\" data-id=\"ab9acd8\" 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-f2f9f1d elementor-cta--layout-image-right elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-widget elementor-widget-call-to-action\" data-id=\"f2f9f1d\" 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<div class=\"elementor-cta\">\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\/2025\/05\/1.7709-CTA.webp);\" role=\"img\" aria-label=\"1.7709-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\tCe que nous faisons\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 fournit des solutions globales pour les mat\u00e9riaux de tuyauterie tels que les TUBES, les RACCORDS, les FLANGES, les VANNES en acier inoxydable, en acier duplex et en acier alli\u00e9, etc. Nous personnaliserons les produits les plus appropri\u00e9s pour vous. 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<a class=\"elementor-cta__button elementor-button elementor-size-\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\">\n\t\t\t\t\t\tNous contacter\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\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-57e3d23 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"57e3d23\" 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-a1a4386\" data-id=\"a1a4386\" 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-39645d9 elementor-widget elementor-widget-heading\" data-id=\"39645d9\" 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\">Traitement thermique et transformation pour la qualit\u00e9<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a2e4dc elementor-widget elementor-widget-text-editor\" data-id=\"7a2e4dc\" 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 data-sourcepos=\"54:1-54:124\">Les fournisseurs doivent suivre des processus stricts pour obtenir les propri\u00e9t\u00e9s 1.7709 requises. L'\u00e9tape critique est la trempe et le revenu :<\/p><ul data-sourcepos=\"56:1-58:0\"><li data-sourcepos=\"56:1-56:144\"><strong>Trempe :<\/strong> Chauffage \u00e0 <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">910-94<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>\u00a0suivi d'une trempe \u00e0 l'huile. Il en r\u00e9sulte une structure martensitique dure.<\/li><li data-sourcepos=\"57:1-58:0\"><strong>Trempe :<\/strong> R\u00e9chauffage \u00e0 haute temp\u00e9rature \u00e0 <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">650-72<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>\u00a0pendant au moins deux heures. Cela permet d'optimiser l'\u00e9quilibre entre la r\u00e9sistance et la robustesse.<\/li><\/ul><p data-sourcepos=\"59:1-59:302\">Un traitement ad\u00e9quat permet d'obtenir une duret\u00e9 uniforme (typiquement <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">325<\/span><span class=\"mbin\">\u00b1<\/span><\/span><span class=\"base\"><span class=\"mord\">5<\/span><span class=\"mord mathnormal\">H<\/span><span class=\"mord mathnormal\">B<\/span><\/span><\/span><\/span><\/span>) et les propri\u00e9t\u00e9s m\u00e9caniques apr\u00e8s traitement. Cette validation garantit une r\u00e9sistance minimale \u00e0 la traction de 1010 MPa et une r\u00e9duction de la surface d'au moins 62%. Ces param\u00e8tres sont essentiels pour les fixations soumises \u00e0 des charges \u00e9lev\u00e9es.<\/p><p data-sourcepos=\"61:1-61:326\">Pour le formage \u00e0 chaud, les temp\u00e9ratures de d\u00e9part sont les suivantes <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">1150-120<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>. La finition doit \u00eatre sup\u00e9rieure \u00e0 <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">85<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>. Cela permet d'\u00e9viter la formation de phases fragiles aux joints de grains. L'\u00e9crouissage peut n\u00e9cessiter un recuit interm\u00e9diaire. Cela permet d'\u00e9viter l'\u00e9crouissage et d'assurer un filetage pr\u00e9cis.<\/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-4089366 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4089366\" 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-5165581\" data-id=\"5165581\" 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-d9ec859 elementor-widget elementor-widget-heading\" data-id=\"d9ec859\" 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\">Nous contacter<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-73b371f elementor-widget-divider--view-line_text elementor-widget-divider--element-align-left elementor-widget elementor-widget-divider\" data-id=\"73b371f\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tPrendre contact\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3298913 elementor-align-start elementor-widget__width-initial elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"3298913\" data-element_type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-map-marker-alt\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">RM901 No.22 Tangjiaqiao Road Wenzhou Chine<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-phone-square-alt\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">+86 577 8551 1171<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"mailto:sales@kaysuns.com\" target=\"_blank\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-envelope-square\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">sales@kaysuns.com<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.kaysuns.com\/fr\/\" target=\"_blank\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-book-reader\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">https:\/\/www.kaysuns.com\/<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-86cf552 elementor-widget-divider--view-line_text elementor-widget-divider--element-align-left elementor-widget elementor-widget-divider\" data-id=\"86cf552\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tTrouvez-nous\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fbe71b e-grid-align-left elementor-shape-square elementor-grid-0 elementor-widget elementor-widget-social-icons\" data-id=\"2fbe71b\" data-element_type=\"widget\" data-widget_type=\"social-icons.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-social-icons-wrapper elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t<span class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t<a class=\"elementor-icon elementor-social-icon elementor-social-icon-facebook elementor-repeater-item-2f55736\" href=\"https:\/\/www.facebook.com\/kaysuns?mibextid=LQQJ4d\" target=\"_blank\" rel=\"nofollow\" >\n\t\t\t\t\t\t<span class=\"elementor-screen-only\">Facebook<\/span>\n\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fab fa-facebook\"><\/i>\t\t\t\t\t<\/a>\n\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<span class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t<a class=\"elementor-icon elementor-social-icon elementor-social-icon-linkedin elementor-repeater-item-25db865\" href=\"https:\/\/www.linkedin.com\/company\/kaysuns\/\" target=\"_blank\" rel=\"nofollow\" >\n\t\t\t\t\t\t<span class=\"elementor-screen-only\">Linkedin<\/span>\n\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fab fa-linkedin\"><\/i>\t\t\t\t\t<\/a>\n\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<span class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t<a class=\"elementor-icon elementor-social-icon elementor-social-icon-envelope elementor-repeater-item-bb1358c\" href=\"mailto:sales@kaysuns.com\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-screen-only\">Enveloppe<\/span>\n\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-envelope\"><\/i>\t\t\t\t\t<\/a>\n\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\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-e580bc9\" data-id=\"e580bc9\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\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-485b190 elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"485b190\" data-element_type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Blog-Contact\" aria-label=\"Blog-Contact\" action=\"\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"49709\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"485b190\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"1.7709 Steel:Crucial for High-Performance Pipe &amp; Fittings - Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"49709\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tNom\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Nom\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-number elementor-field-group elementor-column elementor-field-group-field_ff18289 elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_ff18289\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tT\u00e9l\u00e9phone\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t<input type=\"number\" name=\"form_fields[field_ff18289]\" id=\"form-field-field_ff18289\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" 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Connu sous sa d\u00e9signation standard europ\u00e9enne 21CrMoV5-7, ce mat\u00e9riau est un acier alli\u00e9 tremp\u00e9 et revenu. Il est strictement conforme \u00e0 la norme EN 10269-2006. Cette norme couvre sp\u00e9cifiquement les aciers pour fixations utilis\u00e9s \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es et basses. Sa r\u00e9sistance principale provient d'\u00e9l\u00e9ments d'alliage tels que le chrome (Cr),...&nbsp;<a href=\"https:\/\/www.kaysuns.com\/fr\/1-7709-acier-crucial-pour-les-raccords-de-tuyauterie-a-haute-performance\/\" rel=\"bookmark\">Lire plus \"<span class=\"screen-reader-text\">Le pouvoir d'achat : Pourquoi l'acier 1.7709 (21CrMoV5-7) est essentiel pour les tuyaux et les raccords \u00e0 haute performance<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":49720,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[316,186,51],"tags":[],"class_list":["post-49709","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-stainless-steel-knowledge","category-materials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1.7709 Steel:Crucial for High-Performance Pipe &amp; 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