{"id":56704,"date":"2026-01-20T06:12:23","date_gmt":"2026-01-20T06:12:23","guid":{"rendered":"https:\/\/www.kaysuns.com\/?post_type=blog&#038;p=56704"},"modified":"2026-01-20T06:16:19","modified_gmt":"2026-01-20T06:16:19","slug":"alliage-20-vs-28","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/alliage-20-vs-28\/","title":{"rendered":"Alliage 20 vs 28, quelle est la diff\u00e9rence ?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"56704\" class=\"elementor elementor-56704\" data-elementor-post-type=\"blog\">\n\t\t\t\t<div class=\"elementor-element elementor-element-75804a9 e-flex e-con-boxed e-con e-parent\" data-id=\"75804a9\" 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-ce26fba elementor-widget elementor-widget-text-editor\" data-id=\"ce26fba\" 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>Alliage 20 vs 28<\/strong>,Bien que les deux mat\u00e9riaux appartiennent \u00e0 la famille des aciers inoxydables de haute performance, ils se livrent \u00e0 des \u201cbatailles\u201d chimiques diff\u00e9rentes.\u201d<br \/>\nSi vous faites un mauvais choix, vous risquez une fissuration pr\u00e9matur\u00e9e par corrosion sous contrainte ou des piq\u00fbres localis\u00e9es. Ce guide pr\u00e9sente les diff\u00e9rences chimiques, m\u00e9caniques et pratiques entre ces deux moteurs.\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-6e238e6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6e238e6\" 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-dd00842\" data-id=\"dd00842\" 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-d6591ec elementor-widget elementor-widget-heading\" data-id=\"d6591ec\" 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'alliage 20<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9925312 elementor-widget elementor-widget-text-editor\" data-id=\"9925312\" 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'alliage 20 (UNS N08020) a re\u00e7u le surnom d\u201c\u201dalliage pour l'acide sulfurique\" pour une bonne raison : les scientifiques ont sp\u00e9cifiquement d\u00e9velopp\u00e9 ce mat\u00e9riau stabilis\u00e9 au niobium pour r\u00e9sister \u00e0 l'acide sulfurique en \u00e9bullition, \u00e0 la fronti\u00e8re entre l'acier inoxydable et les alliages de nickel.\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-170890b elementor-widget elementor-widget-text-editor\" data-id=\"170890b\" 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\tDans un r\u00e9seau de tuyauterie typique, l'alliage 20 est le meilleur choix pour le traitement chimique et la production alimentaire.Sa teneur \u00e9lev\u00e9e en nickel emp\u00eache la fissuration par corrosion sous contrainte induite par le chlorure.En outre, l'ajout de cuivre fournit une d\u00e9fense unique contre les acides agressifs.Pour les concepteurs de raccords de tuyauterie en acier inoxydable, l'alliage 20 offre une solution fiable pour le transport d'acides \u00e0 concentration moyenne \u00e0 \u00e9lev\u00e9e.\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-ffc4495 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ffc4495\" 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-3eee571\" data-id=\"3eee571\" 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-df38943 elementor-widget elementor-widget-heading\" data-id=\"df38943\" 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'alliage 28<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bdbb4d elementor-widget elementor-widget-text-editor\" data-id=\"8bdbb4d\" 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'alliage 28 (UNS N08028) est un acier inoxydable aust\u00e9nitique fortement alli\u00e9 et travaill\u00e9 \u00e0 froid.Alors que l'alliage 20 est destin\u00e9 aux acides, l'alliage 28 prosp\u00e8re dans les puits de p\u00e9trole et de gaz profonds et \u201dacides\u201d.Il contient des niveaux plus \u00e9lev\u00e9s de chrome et de molybd\u00e8ne par rapport \u00e0 de nombreuses nuances 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-ccc9bf3 elementor-widget elementor-widget-text-editor\" data-id=\"ccc9bf3\" 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\tCette chimie lui conf\u00e8re une r\u00e9sistance exceptionnelle \u00e0 la corrosion par piq\u00fbres et par crevasses.Dans le monde des tuyaux en acier inoxydable, l'alliage 28 est souvent utilis\u00e9 dans les tubes de fond de puits et les \u00e9changeurs de chaleur.Il supporte les environnements \u00e0 haute pression o\u00f9 le sulfure d'hydrog\u00e8ne (H<sub>2<\/sub>Si votre syst\u00e8me est confront\u00e9 \u00e0 des conditions en eaux profondes ou \u00e0 une production complexe d'acide phosphorique, l'alliage 28 est le meilleur candidat.\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-d2c5c7d elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d2c5c7d\" 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-dcc4acc\" data-id=\"dcc4acc\" 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-5228c4b elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"5228c4b\" 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-e4c756d elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"e4c756d\" 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-ba82fa1 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"ba82fa1\" 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-798de64\" data-id=\"798de64\" 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-c8e0641 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"c8e0641\" 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-26361d2 elementor-align-center elementor-mobile-align-center elementor-widget__width-initial elementor-widget elementor-widget-button\" data-id=\"26361d2\" 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<div class=\"elementor-element elementor-element-78078dc e-flex e-con-boxed e-con e-parent\" data-id=\"78078dc\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-fa45f3a e-con-full e-flex e-con e-child\" data-id=\"fa45f3a\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-31950b3 elementor-widget elementor-widget-heading\" data-id=\"31950b3\" 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\">Quand choisir l'alliage 20<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-707d56f elementor-widget elementor-widget-text-editor\" data-id=\"707d56f\" 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>Traitement de l'acide sulfurique<\/li><li>Lignes alimentaires et pharmaceutiques<\/li><li>Fabrication complexe<\/li><li>Exigences en mati\u00e8re de stabilisation du niobium<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-15d4512 e-con-full e-flex e-con e-child\" data-id=\"15d4512\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f75f74 elementor-widget elementor-widget-heading\" data-id=\"0f75f74\" 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\">Quand choisir l'alliage 28<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-445ad62 elementor-widget elementor-widget-text-editor\" data-id=\"445ad62\" 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>Environnements de gaz acides<\/li><li>Production d'acide phosphorique<\/li><li>\u00c9changeurs de chaleur \u00e0 eau de mer<\/li><li>Tubes haute pression<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\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-525335b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"525335b\" 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-658b0ec\" data-id=\"658b0ec\" 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-201b5e2 elementor-widget elementor-widget-heading\" data-id=\"201b5e2\" 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\">Alliage 20 VS 28 : comparaison de la 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-78d4647 elementor-widget elementor-widget-text-editor\" data-id=\"78d4647\" 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>Alliage 20 (UNS N08020)<\/th>\n<th>Alliage 28 (UNS N08028)<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Ni<\/td>\n<td>32.5 - 35<\/td>\n<td>30 - 32<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Cr<\/td>\n<td>19 - 21<\/td>\n<td>26 - 28<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Fe<\/td>\n<td>Equilibre (~ 33)<\/td>\n<td>\u00c9quilibre (~ 35)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Mo<\/td>\n<td>2 - 3<\/td>\n<td>3 - 4<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Cu<\/td>\n<td>3 - 4<\/td>\n<td>0.6 - 1.4<\/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-e37c259 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e37c259\" 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-8cdf026\" data-id=\"8cdf026\" 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-252d2c9 elementor-widget elementor-widget-heading\" data-id=\"252d2c9\" 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\">Alliage 20 VS 28 : pression et m\u00e9canique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a10104 elementor-widget elementor-widget-text-editor\" data-id=\"8a10104\" 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'alliage 28 est souvent soumis \u00e0 un travail \u00e0 froid pour am\u00e9liorer ses propri\u00e9t\u00e9s m\u00e9caniques, ce qui le rend id\u00e9al pour les tubes \u00e0 haute pression o\u00f9 l'\u00e9paisseur des parois doit \u00eatre r\u00e9duite au minimum. En revanche, l'alliage 20 conserve un profil de r\u00e9sistance aust\u00e9nitique plus standard et il est plus facile de le transformer en raccords de tuyauterie complexes en acier inoxydable tels que les t\u00e9s et les r\u00e9ducteurs.\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-ae95e40 elementor-widget elementor-widget-text-editor\" data-id=\"ae95e40\" 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 outre, les taux de dilatation thermique diff\u00e8rent l\u00e9g\u00e8rement.Lorsque vous concevez un joint de bride, vous devez vous assurer que vos joints et vos boulons peuvent supporter le cycle thermique de ces alliages.Parce qu'ils ont tous deux une teneur \u00e9lev\u00e9e en nickel, ils se dilatent davantage que l'acier au carbone.Par cons\u00e9quent, l'utilisation des normes d'assemblage correctes, telles que l'ASME PCC-1, est vitale pour un raccordement sans fuite.\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-cf8daa0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cf8daa0\" 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-97f7011\" data-id=\"97f7011\" 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-165c1a9 elementor-widget elementor-widget-heading\" data-id=\"165c1a9\" 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\">Alliage 20 VS 28 : comparaison de la r\u00e9sistance \u00e0 la corrosion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b5b61f elementor-widget elementor-widget-text-editor\" data-id=\"7b5b61f\" 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>Milieux corrosifs<\/th>\n<th>Alliage pr\u00e9f\u00e9r\u00e9<\/th>\n<th>Raison de la s\u00e9lection<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Acide sulfurique (H<sub>2<\/sub>SO<sub>4<\/sub>)<\/td>\n<td rowspan=\"3\">Alliage 20<\/td>\n<td>Teneur plus \u00e9lev\u00e9e en cuivre et en nickel<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Acide nitrique (HNO<sub>3<\/sub>)<\/td>\n<td>Performance stable dans les acides oxydants<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Fluides pharmaceutiques<\/td>\n<td>Excellente puret\u00e9 et facilit\u00e9 de nettoyage<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Acide phosphorique (H<sub>3<\/sub>PO<sub>4<\/sub>)<\/td>\n<td rowspan=\"2\">Alliage 28<\/td>\n<td>Teneur sup\u00e9rieure en chrome (27%)<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Gaz acides (H<sub>2<\/sub>S + Cl<sup>\u2013<\/sup>)<\/td>\n<td>Meilleure r\u00e9sistance \u00e0 Pitting\/SSC<\/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-a7bd5c0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a7bd5c0\" 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-e54527a\" data-id=\"e54527a\" 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-08f1aa9 elementor-widget elementor-widget-heading\" data-id=\"08f1aa9\" 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\">Alliage 20 VS 28 : d\u00e9fis en mati\u00e8re de fabrication et de soudage<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-716d333 elementor-widget elementor-widget-text-editor\" data-id=\"716d333\" 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 l'acier inoxydable de ces qualit\u00e9s n\u00e9cessite une expertise professionnelle.<a href=\"https:\/\/www.kaysuns.com\/fr\/fournisseur-de-tuyaux-en-alliage-20\/\" target=\"_blank\" rel=\"noopener\">Tube en alliage 20<\/a> est stabilis\u00e9 au niobium pour \u00e9viter la \u201csensibilisation\u201d pendant le soudage, ce qui signifie que vous pouvez le souder sans perdre la r\u00e9sistance \u00e0 la corrosion dans la zone affect\u00e9e thermiquement.\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-5257e45 elementor-widget elementor-widget-text-editor\" data-id=\"5257e45\" 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'alliage 28 n\u00e9cessite un contr\u00f4le minutieux de la chaleur afin d'\u00e9viter la formation de phases interm\u00e9talliques. Si le bain de soudure reste trop chaud pendant trop longtemps, le mat\u00e9riau peut devenir cassant.<br \/>Les professionnels de Kaysuns utilisent souvent le soudage TIG avec du gaz Argon de haute puret\u00e9 pour la passe de racine d'un tuyau en alliage 28, ce qui garantit que la couche passive interne reste intacte, emp\u00eachant ainsi toute corrosion localis\u00e9e future au niveau du joint.\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-25c10c3 e-flex e-con-boxed e-con e-parent\" data-id=\"25c10c3\" 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-017f4e2 elementor-cta--layout-image-left elementor-cta--mobile-layout-image-above elementor-cta--skin-classic elementor-animated-content elementor-widget elementor-widget-call-to-action\" data-id=\"017f4e2\" 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\/2025\/12\/alloy-20-pipe.webp);\" role=\"img\" aria-label=\"alliage-20-tuyau\"><\/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-b1d9f71 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b1d9f71\" 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-625d3ff\" data-id=\"625d3ff\" 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-52f1b50 elementor-widget elementor-widget-heading\" data-id=\"52f1b50\" 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\">Alliage 20 vs 28 : Comparaison du PREN<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7811b69 elementor-widget elementor-widget-text-editor\" data-id=\"7811b69\" 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 les ing\u00e9nieurs \u00e9valuent l'alliage 20 par rapport \u00e0 l'alliage 28 pour l'eau de mer ou les environnements riches en chlorures, ils examinent l'indice \u00e9quivalent de r\u00e9sistance \u00e0 la piq\u00fbre (PREN), une formule qui mesure la r\u00e9sistance d'un alliage aux piq\u00fbres localis\u00e9es.\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-81f14c8 elementor-widget elementor-widget-text-editor\" data-id=\"81f14c8\" 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<div class=\"math-block\" data-math=\"PREN = Cr + 3.3 \\cdot Mo + 16 \\cdot N\"><strong>PREN = Cr + 3,3 - Mo + 16 - N<\/strong><\/div>\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-81e76f5 elementor-widget elementor-widget-text-editor\" data-id=\"81e76f5\" 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'alliage 28 pr\u00e9sente g\u00e9n\u00e9ralement un PREN d'environ <b data-path-to-node=\"17\" data-index-in-node=\"50\">38 \u00e0 40<\/b>,tandis que l'alliage 20 se situe autour de <b data-path-to-node=\"17\" data-index-in-node=\"87\">24 \u00e0 26<\/b>.<br \/>Par cons\u00e9quent, l'alliage 28 est nettement mieux \u00e9quip\u00e9 pour les environnements o\u00f9 les d\u00e9p\u00f4ts de sel ou les fluides stagnants peuvent provoquer des br\u00e8ches localis\u00e9es dans la couche passive. Si votre syst\u00e8me de tuyauterie utilise des \u00e9changeurs de chaleur refroidis \u00e0 l'eau de mer, le PREN plus \u00e9lev\u00e9 de l'alliage 28 est essentiel pour la s\u00e9curit\u00e9 \u00e0 long terme.\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-fc1e1a1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fc1e1a1\" 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-0173d9e\" data-id=\"0173d9e\" 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-c93f506 elementor-widget elementor-widget-heading\" data-id=\"c93f506\" 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-e8d23c4 elementor-widget-divider--view-line_text elementor-widget-divider--element-align-left elementor-widget elementor-widget-divider\" data-id=\"e8d23c4\" 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-48ba3ed 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