{"id":5502,"date":"2020-01-10T06:41:16","date_gmt":"2020-01-10T06:41:16","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=5502"},"modified":"2026-03-03T02:36:30","modified_gmt":"2026-03-03T02:36:30","slug":"quest-ce-que-lacier-inoxydable-duplex-et-quels-sont-ses-avantages-et-ses-inconvenients","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-lacier-inoxydable-duplex-et-quels-sont-ses-avantages-et-ses-inconvenients\/","title":{"rendered":"Qu&#039;est-ce que l&#039;acier inoxydable duplex et quels sont ses avantages et inconv\u00e9nients"},"content":{"rendered":"<h2>Qu&#039;est-ce que l&#039;acier inoxydable duplex? Avantages et inconv\u00e9nients<\/h2>\n<figure id=\"attachment_5503\" aria-describedby=\"caption-attachment-5503\" style=\"width: 449px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/01\/duplex-pipes123.jpg\" target=\"_blank\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-5503\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/01\/duplex-pipes123.jpg\" alt=\"tuyaux duplex\" width=\"449\" height=\"320\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/01\/duplex-pipes123.jpg 449w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/01\/duplex-pipes123-300x214.jpg 300w\" sizes=\"(max-width: 449px) 100vw, 449px\" \/><\/a><figcaption id=\"caption-attachment-5503\" class=\"wp-caption-text\">tuyaux duplex<\/figcaption><\/figure>\n<p>L&#039;acier inoxydable duplex a une excellente r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et est \u00e9galement un acier inoxydable duplex (DSS) en acier inoxydable \u00e0 \u00e9conomie de nickel. Il fait r\u00e9f\u00e9rence \u00e0 la ferrite et \u00e0 l&#039;aust\u00e9nite repr\u00e9sentant chacune environ 50%. G\u00e9n\u00e9ralement, le contenu de moins de phase est le moins besoin \u00e9galement d&#039;atteindre 30% d&#039;acier inoxydable.<\/p>\n<p>Dans le cas d&#039;une faible teneur en C, la teneur en Cr est de 18% \u00e0 28% et la teneur en Ni est de 3% \u00e0 10%. Certains aciers contiennent \u00e9galement des \u00e9l\u00e9ments d&#039;alliage tels que Mo, Cu, Nb, Ti et N. Ce type d&#039;acier a les caract\u00e9ristiques de l&#039;acier inoxydable aust\u00e9nite et ferritique.<\/p>\n<p>Par rapport \u00e0 la ferrite, il pr\u00e9sente une plasticit\u00e9 et une t\u00e9nacit\u00e9 plus \u00e9lev\u00e9es, il n'est pas fragile \u00e0 temp\u00e9rature ambiante, ce qui l'am\u00e9liore consid\u00e9rablement. <a href=\"https:\/\/www.kaysuns.com\/fr\/corrosion-intergranulaire-danger-cache\/\" target=\"_blank\" rel=\"noopener\">corrosion intergranulaire<\/a> La r\u00e9sistance \u00e0 la traction et la performance de soudage, la fragilit\u00e9 \u00e0 475\u00b0C, la conductivit\u00e9 thermique \u00e9lev\u00e9e et la superplasticit\u00e9.<\/p>\n<p>Compar\u00e9 \u00e0 l&#039;acier inoxydable aust\u00e9nitique, il a une r\u00e9sistance plus \u00e9lev\u00e9e et une r\u00e9sistance consid\u00e9rablement am\u00e9lior\u00e9e \u00e0 la corrosion intergranulaire et \u00e0 la corrosion sous contrainte de chlorure.<\/p>\n<hr \/>\n<h3>L&#039;acier inoxydable duplex peut g\u00e9n\u00e9ralement \u00eatre divis\u00e9 en quatre cat\u00e9gories :<\/h3>\n<p>Le premier type d'alliage faible, repr\u00e9sentant la qualit\u00e9 <a href=\"https:\/\/www.kaysuns.com\/fr\/tube-lean-duplex-uns-s32304\/\" target=\"_blank\" rel=\"noopener\">UNSS32304<\/a>, ne contient pas de molybd\u00e8ne dans l'acier, PREN : 24-25, et peut \u00eatre utilis\u00e9 \u00e0 la place de l'AISI304 ou 316 en termes de r\u00e9sistance \u00e0 la corrosion sous contrainte.<\/p>\n<p>Le deuxi\u00e8me type est de type alliage moyen, repr\u00e9sentant la nuance UNSS31803, PREN\u00a0: 32-33, avec une r\u00e9sistance \u00e0 la corrosion entre l&#039;acier inoxydable aust\u00e9nitique AISI316L et 6% MO N.<\/p>\n<p>Le troisi\u00e8me type de type fortement alli\u00e9, contient g\u00e9n\u00e9ralement du 25% CR, contient \u00e9galement du molybd\u00e8ne et de l&#039;azote, et certains contiennent \u00e9galement du cuivre et du tungst\u00e8ne, les qualit\u00e9s standard sont UNSS32550, PREN\u00a0: 38-39 r\u00e9sistance \u00e0 la corrosion sup\u00e9rieure \u00e0 l&#039;acier inoxydable duplex 22% Cr.<\/p>\n<p>Le quatri\u00e8me type d&#039;acier inoxydable super duplex contient une teneur \u00e9lev\u00e9e en molybd\u00e8ne et en azote. Les qualit\u00e9s standard sont UNSS32750 et certaines contiennent \u00e9galement du tungst\u00e8ne et du cuivre. PREN&gt; 40, qui peut \u00eatre utilis\u00e9 dans des conditions moyennes difficiles et a une bonne r\u00e9sistance \u00e0 la corrosion et des propri\u00e9t\u00e9s m\u00e9caniques compl\u00e8tes. Comparable \u00e0 l&#039;acier inoxydable super aust\u00e9nitique.<\/p>\n<p>*Remarque\u00a0: PREN\u00a0: nombre \u00e9quivalent de r\u00e9sistance aux piq\u00fbres<\/p>\n<hr \/>\n<h3>Avantages de l&#039;acier inoxydable duplex<\/h3>\n<h4><strong>1. Compar\u00e9 \u00e0 l&#039;acier inoxydable aust\u00e9nitique<\/strong><\/h4>\n<ul>\n<li>1) La r\u00e9sistance du v\u00eatement est plus du double de celle de l&#039;acier inoxydable aust\u00e9nitique ordinaire, et il a une t\u00e9nacit\u00e9 plastique suffisante requise pour le formage. L&#039;\u00e9paisseur du r\u00e9servoir de stockage ou de la cuve sous pression en acier inoxydable duplex est inf\u00e9rieure de 30-50% \u00e0 celle de l&#039;acier inoxydable aust\u00e9nitique commun, ce qui est b\u00e9n\u00e9fique pour r\u00e9duire les co\u00fbts.<\/li>\n<li>2) Il a une excellente r\u00e9sistance \u00e0 la fissuration par corrosion sous contrainte, en particulier dans l&#039;environnement contenant des ions chlorure. M\u00eame l&#039;acier inoxydable duplex avec la plus faible teneur en alliage a une r\u00e9sistance plus \u00e9lev\u00e9e \u00e0 la fissuration par corrosion sous contrainte que l&#039;acier inoxydable aust\u00e9nitique. La corrosion sous contrainte est Le probl\u00e8me en suspens que l&#039;acier inoxydable aust\u00e9nitique ordinaire est difficile \u00e0 r\u00e9soudre.<\/li>\n<li>3) La r\u00e9sistance \u00e0 la corrosion de l&#039;acier inoxydable duplex 2205 le plus courant est meilleure que celle de l&#039;acier inoxydable aust\u00e9nitique 316L ordinaire dans de nombreux milieux. L&#039;acier inoxydable super duplex a une r\u00e9sistance \u00e0 la corrosion extr\u00eamement \u00e9lev\u00e9e. Dans certains milieux, comme l&#039;acide ac\u00e9tique, etc. Il peut m\u00eame remplacer l&#039;acier inoxydable aust\u00e9nitique fortement alli\u00e9 et m\u00eame les alliages r\u00e9sistants \u00e0 la corrosion.<\/li>\n<li>4) Il a une bonne r\u00e9sistance \u00e0 la corrosion locale. Par rapport \u00e0 l&#039;acier inoxydable aust\u00e9nitique \u00e0 teneur en alliage, sa r\u00e9sistance \u00e0 l&#039;usure et ses performances en fatigue par corrosion sont meilleures que celles de l&#039;acier inoxydable aust\u00e9nitique.<\/li>\n<li>5) Il a un coefficient de dilatation lin\u00e9aire inf\u00e9rieur \u00e0 celui de l&#039;acier inoxydable aust\u00e9nitique, est proche de l&#039;acier au carbone et convient au raccordement avec de l&#039;acier au carbone. Il a une importance technique importante, telle que la production de plaques ou de rev\u00eatements composites.<\/li>\n<\/ul>\n<h4><strong>2. Par rapport \u00e0 l&#039;acier inoxydable ferritique, les avantages de l&#039;acier inoxydable duplex sont les suivants\u00a0:<\/strong><\/h4>\n<ul>\n<li>1) Les propri\u00e9t\u00e9s m\u00e9caniques compl\u00e8tes sont sup\u00e9rieures \u00e0 celles de l&#039;acier inoxydable ferritique, en particulier la t\u00e9nacit\u00e9 du plastique. Pas aussi sensible \u00e0 la fragilit\u00e9 que l&#039;acier inoxydable ferritique.<\/li>\n<li>2) \u00c0 l&#039;exception de la r\u00e9sistance \u00e0 la corrosion sous contrainte, une autre r\u00e9sistance \u00e0 la corrosion locale est meilleure que l&#039;acier inoxydable ferritique.<\/li>\n<li>3) Les performances du processus de travail \u00e0 froid et les performances de formage \u00e0 froid sont bien meilleures que l&#039;acier inoxydable ferritique.<\/li>\n<li>4) Les performances de soudage sont bien meilleures que celles de l&#039;acier inoxydable ferritique. G\u00e9n\u00e9ralement, aucun pr\u00e9chauffage n&#039;est requis avant le soudage et aucun traitement thermique n&#039;est requis.<\/li>\n<li>5) Le domaine d&#039;application est plus large que l&#039;acier inoxydable ferritique.<\/li>\n<\/ul>\n<h3><\/h3>\n<hr \/>\n<h3>Applications de l&#039;acier inoxydable duplex<\/h3>\n<p>En raison de la haute r\u00e9sistance de l'acier duplex, il est souvent possible d'\u00e9conomiser des mat\u00e9riaux, par exemple en r\u00e9duisant l'\u00e9paisseur de la paroi du tube duplex. Prenons l'exemple d'un <a href=\"https:\/\/www.kaysuns.com\/fr\/duplex-2205-stainless-steel-pipe\/\" target=\"_blank\">SAF2205<\/a>, SAF2507.<\/p>\n<p>SAF2205 est adapt\u00e9 pour une utilisation dans des environnements contenant du chlore. Le mat\u00e9riau convient \u00e0 une utilisation dans des raffineries contenant du chlorure ou d&#039;autres milieux de traitement.<\/p>\n<p>Le SAF2205 est particuli\u00e8rement adapt\u00e9 aux \u00e9changeurs de chaleur utilisant des solutions aqueuses contenant du chlore ou de l&#039;eau saum\u00e2tre comme fluide de refroidissement. Ce mat\u00e9riau convient \u00e9galement aux solutions dilu\u00e9es d&#039;acide sulfurique et aux acides organiques purs et \u00e0 leurs m\u00e9langes.<\/p>\n<p>Utilis\u00e9 depuis 1983, le SAF2507 a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour les environnements difficiles contenant du chlore et a de nombreuses applications importantes dans l&#039;industrie de transformation.<\/p>","protected":false},"featured_media":5503,"template":"","categories":[186],"tags":[],"class_list":["post-5502","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is Duplex Stainless Steel And What Are Its Advantages And Disadvantages - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\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.kaysuns.com\/fr\/blog\/quest-ce-que-lacier-inoxydable-duplex-et-quels-sont-ses-avantages-et-ses-inconvenients\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is Duplex Stainless Steel And What Are Its Advantages And Disadvantages - Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n<meta property=\"og:description\" content=\"What Is Duplex Stainless Steel?\u00a0Advantages And Disadvantages Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel Duplex Stainless Steel (DSS). 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It refers to ferrite and austenite each accounting for about 50%. Generally, the content of less phase is the least Also need to reach 30% of stainless steel. 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