{"id":6504,"date":"2020-11-20T02:48:12","date_gmt":"2020-11-20T02:48:12","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6504"},"modified":"2025-12-15T07:07:14","modified_gmt":"2025-12-15T07:07:14","slug":"composition-chimique-et-resistance-a-la-corrosion-de-lacier-duplex-2707hd-s32707-acier-inoxydable","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/composition-chimique-et-resistance-a-la-corrosion-de-lacier-duplex-2707hd-s32707-acier-inoxydable\/","title":{"rendered":"Composition chimique et r\u00e9sistance \u00e0 la corrosion de l&#039;acier duplex 2707HD (acier inoxydable s32707)"},"content":{"rendered":"<p>L&#039;acier duplex 2707HD est un acier inoxydable super duplex et sa nuance UNS correspondante est l&#039;acier inoxydable S32707.<\/p>\n\n\n\n<p>L'acier inoxydable super duplex sp\u00e9cial est con\u00e7u pour pallier le manque local <a href=\"https:\/\/www.kaysuns.com\/fr\/la-resistance-a-la-corrosion-de-lacier-inoxydable\/\" target=\"_blank\">r\u00e9sistance \u00e0 la corrosion<\/a> et la r\u00e9sistance \u00e0 la chaleur du chlorure de l'acier inoxydable super duplex. Il est apparu apr\u00e8s 2000. La valeur PRE de l'acier inoxydable S32707 peut atteindre 49. Il est riche en azote, <a href=\"https:\/\/www.kaysuns.com\/fr\/role-du-molybdene-dans-les-tubes-et-raccords-en-acier-inoxydable\/\" target=\"_blank\">molybd\u00e8ne<\/a>La structure permet d'atteindre une limite d'\u00e9lasticit\u00e9 et une r\u00e9sistance \u00e0 la traction de 800MPa et 1000MPa respectivement. Gr\u00e2ce \u00e0 cette structure, la limite d'\u00e9lasticit\u00e9 et la r\u00e9sistance \u00e0 la traction du tube d'acier atteignent respectivement 800MPa et 1000MPa, et la plasticit\u00e9 et la t\u00e9nacit\u00e9 sont \u00e9galement maintenues \u00e0 un niveau relativement \u00e9lev\u00e9, n\u00e9cessaire pour les applications d'ing\u00e9nierie.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"629\" height=\"287\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/04\/heat-exchanger.jpg\" alt=\"\u00e9changeur de chaleur\" class=\"wp-image-5807\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/04\/heat-exchanger.jpg 629w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/04\/heat-exchanger-300x137.jpg 300w\" sizes=\"(max-width: 629px) 100vw, 629px\" \/><figcaption class=\"wp-element-caption\">\u00c9changeur de chaleur<\/figcaption><\/figure>\n<\/div>\n\n\n<p>L&#039;av\u00e8nement de l&#039;acier duplex 2707HD a consid\u00e9rablement \u00e9largi la gamme d&#039;applications de l&#039;acier inoxydable duplex et am\u00e9lior\u00e9 sa comp\u00e9titivit\u00e9 avec les mat\u00e9riaux \u00e0 haute teneur en nickel tels que l&#039;acier inoxydable super aust\u00e9nitique et les alliages r\u00e9sistant \u00e0 la corrosion \u00e0 haute teneur en nickel dans les applications d&#039;ing\u00e9nierie. La structure de l&#039;acier duplex 2707HD n&#039;est pas significativement diff\u00e9rente de l&#039;acier inoxydable super duplex tel que l&#039;acier inoxydable 2507.<\/p>\n\n\n\n<table width=\"80%\" border=\"1\" align=\"center\" cellpadding=\"1\" cellspacing=\"1\">\n  <col width=\"72\" span=\"12\" \/>\n  <tr>\n    <td colspan=\"12\" align=\"center\" u1:str=\"\"><strong>Composition chimique de l&#039;acier duplex 2707HD (%)<\/strong><\/td>\n  <\/tr>\n  <tr>\n    <td rowspan=\"2\" u1:str=\"\">Degr\u00e9 de composition chimique<\/td>\n    <td rowspan=\"2\" u1:str=\"\">Classe UNS<\/td>\n    <td u1:str=\"\">C<\/td>\n    <td u1:str=\"\">Si<\/td>\n    <td u1:str=\"\">Mn<\/td>\n    <td u1:str=\"\">S<\/td>\n    <td u1:str=\"\">P<\/td>\n    <td rowspan=\"2\" u1:str=\"\">Cr<\/td>\n    <td rowspan=\"2\" u1:str=\"\">Ni<\/td>\n    <td rowspan=\"2\" u1:str=\"\">Mo<\/td>\n    <td rowspan=\"2\" u1:str=\"\">Cu<\/td>\n    <td rowspan=\"2\" u1:str=\"\">N<\/td>\n  <\/tr>\n  <tr>\n    <td>max<\/td>\n    <td>max<\/td>\n    <td>max<\/td>\n    <td>max<\/td>\n    <td>max<\/td>\n  <\/tr>\n  <tr>\n    <td rowspan=\"2\" u1:str=\"\">00Cr27Ni7Mo5N<\/td>\n    <td u1:str=\"\">SAF 2707HD<\/td>\n    <td rowspan=\"2\" 0000000000000=\"\" u1:num=\"0.03\">0.03<\/td>\n    <td rowspan=\"2\" u1:num=\"1\" 00000000000000=\"\">1.00&nbsp;<\/td>\n    <td rowspan=\"2\" u1:num=\"1.5\" 000000000000=\"\">1.50&nbsp;<\/td>\n    <td rowspan=\"2\" 0000000000000=\"\" u1:num=\"0.02\">0.02<\/td>\n    <td rowspan=\"2\" u1:num=\"0.035\" 000000000000=\"\">0.035<\/td>\n    <td rowspan=\"2\" u1:str=\"\">26\/29<\/td>\n    <td rowspan=\"2\" u1:str=\"\">5.5\/9.5<\/td>\n    <td rowspan=\"2\" u1:str=\"\">4.0\/5.0<\/td>\n    <td rowspan=\"2\" u1:num=\"1\" 00000000000000=\"\">1<\/td>\n    <td rowspan=\"2\" u1:str=\"\">0.3\/0.5<\/td>\n  <\/tr>\n  <tr>\n    <td>UNS S32707<\/td>\n  <\/tr>\n<\/table>\n\n\n\n<p>\u00c9tant donn\u00e9 que la limite d&#039;\u00e9lasticit\u00e9 de l&#039;acier inoxydable duplex g\u00e9n\u00e9ral est le double de celle de l&#039;acier inoxydable aust\u00e9nitique g\u00e9n\u00e9ral, l&#039;utilisation de l&#039;acier inoxydable duplex peut r\u00e9duire consid\u00e9rablement l&#039;\u00e9paisseur du mat\u00e9riau et r\u00e9duire le poids de l&#039;\u00e9quipement, ce qui peut \u00e9conomiser des mat\u00e9riaux et r\u00e9duire les co\u00fbts. L&#039;acier duplex 2707HD est sup\u00e9rieur \u00e0 l&#039;acier inoxydable duplex g\u00e9n\u00e9ral et \u00e0 l&#039;acier inoxydable super duplex et pr\u00e9sente les avantages d&#039;\u00e9conomiser des mat\u00e9riaux et de r\u00e9duire les co\u00fbts.<\/p>\n\n\n\n<p>L&#039;acier inoxydable S32707 a une bonne soudabilit\u00e9. Il est surtout utilis\u00e9 pour <a href=\"https:\/\/www.kaysuns.com\/fr\/heat-exchanger-tubing\/\" target=\"_blank\">tube d'\u00e9changeur de chaleur<\/a>. Le soudage TIG\/GTAW (soudage \u00e0 l&#039;arc sous gaz inerte au tungst\u00e8ne\/gaz inerte au tungst\u00e8ne) est recommand\u00e9 pour le soudage des tubes en acier et des plaques tubulaires, ou manuel Pour le soudage et le soudage automatique TIG, le <a href=\"https:\/\/www.kaysuns.com\/fr\/consommables-de-soudage-pour-le-soudage-de-lacier-inoxydable-duplex-et-autres\/\" target=\"_blank\">consommables de soudage<\/a> peut \u00eatre Sandvik 27.9.5L. Dans la structure duplex +\u03b3 du m\u00e9tal fondu et de la zone affect\u00e9e thermiquement, la teneur en ferrite est de 30% \u00e0 70%.<\/p>\n\n\n\n<p>Pour les \u00e9changeurs de chaleur, il est recommand\u00e9 d&#039;utiliser la m\u00e9thode TIG\/GTAW pour souder le tube \u00e0 la plaque tubulaire. Le cycle thermique doit \u00eatre strictement contr\u00f4l\u00e9 pendant le processus de soudage, la temp\u00e9rature intercalaire est inf\u00e9rieure \u00e0 100 et la plage d&#039;apport de chaleur Q est de 0,2 \u00e0 1,5 KJ\/mm.<\/p>\n\n\n\n<p>L&#039;acier inoxydable S32707 a une excellente r\u00e9sistance aux piq\u00fbres, \u00e0 la corrosion caverneuse et \u00e0 la corrosion sous contrainte dans les environnements chlor\u00e9s, et est particuli\u00e8rement adapt\u00e9 \u00e0 la fabrication d&#039;\u00e9quipements d&#039;\u00e9changeur de chaleur qui utilisent de l&#039;eau de mer et des ions chlorure comme fluides de travail et de refroidissement. Par exemple, le faisceau sup\u00e9rieur de l&#039;\u00e9changeur de chaleur de l&#039;unit\u00e9 de distillation atmosph\u00e9rique de la raffinerie a remplac\u00e9 l&#039;acier inoxydable 2507 duplex par de l&#039;acier inoxydable S32707, et le tube de refroidissement du condenseur \u00e0 eau de mer en 2707HD (le c\u00f4t\u00e9 du tube est connect\u00e9 \u00e0 l&#039;eau de mer) a obtenu des r\u00e9sultats satisfaisants. En raison de la composition chimique et des caract\u00e9ristiques de performance de cet acier, il sera expans\u00e9 pour \u00eatre utilis\u00e9 dans des applications r\u00e9sistantes \u00e0 certains acides inorganiques et organiques.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>Post\u00e9 par <a href=\"https:\/\/www.kaysuns.com\/fr\/\" target=\"_blank\">raccords de tuyauterie en acier inoxydable<\/a> fournisseur, KAYSUNS<\/p>","protected":false},"featured_media":2691,"template":"","categories":[186],"tags":[],"class_list":["post-6504","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>Chemical Composition And Corrosion Resistance Of 2707HD Duplex Steel<\/title>\n<meta name=\"description\" content=\"2707HD duplex steel is a super duplex stainless steel with higher yield 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