{"id":2554,"date":"2025-09-18T01:06:33","date_gmt":"2025-09-18T01:06:33","guid":{"rendered":"https:\/\/greenyellow-gerbil-196913.hostingersite.com\/?post_type=product&#038;p=2554"},"modified":"2025-09-18T01:08:13","modified_gmt":"2025-09-18T01:08:13","slug":"weathering-steel-billet-q345b","status":"publish","type":"product","link":"https:\/\/baosteelmaterials.com\/fr\/produit\/weathering-steel-billet-q345b\/","title":{"rendered":"Billet en acier r\u00e9sistant aux intemp\u00e9ries Q345B"},"content":{"rendered":"<table>\n<thead>\n<tr>\n<th>Param\u00e8tres<\/th>\n<th>Valeur<\/th>\n<th>Remarques<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Standard<\/strong><\/td>\n<td>GB\/T 1591-2008, GB\/T 4171-2008<\/td>\n<td>Conforme aux normes relatives aux aciers faiblement alli\u00e9s \u00e0 haute r\u00e9sistance et aux aciers r\u00e9sistant aux intemp\u00e9ries<\/td>\n<\/tr>\n<tr>\n<td><strong>Grade<\/strong><\/td>\n<td>Q345B (type de vieillissement)<\/td>\n<td>Test d'impact \u00e0 20\u2103 avec une r\u00e9sistance accrue \u00e0 la corrosion atmosph\u00e9rique.<\/td>\n<\/tr>\n<tr>\n<td><strong>Composition chimique (wt%)<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>- Carbone (C)<\/td>\n<td>\u22640.20<\/td>\n<td>Contr\u00f4le de la soudabilit\u00e9 et de la r\u00e9sistance \u00e0 la corrosion<\/td>\n<\/tr>\n<tr>\n<td>- Silicium (Si)<\/td>\n<td>\u22640.55<\/td>\n<td>Aide \u00e0 la formation d'une couche d'oxyde protectrice<\/td>\n<\/tr>\n<tr>\n<td>- Mangan\u00e8se (Mn)<\/td>\n<td>\u22641.70<\/td>\n<td>Am\u00e9liore la r\u00e9sistance et la robustesse<\/td>\n<\/tr>\n<tr>\n<td>- Phosphore (P)<\/td>\n<td>0.015 - 0.040<\/td>\n<td>Favorise la formation de patine pour une meilleure r\u00e9sistance aux intemp\u00e9ries<\/td>\n<\/tr>\n<tr>\n<td>- Soufre (S)<\/td>\n<td>\u22640.040<\/td>\n<td>Minimis\u00e9 pour r\u00e9duire les risques de fragilit\u00e9 et de corrosion<\/td>\n<\/tr>\n<tr>\n<td>- Chrome (Cr)<\/td>\n<td>0.30 - 0.70<\/td>\n<td>\u00c9l\u00e9ment cl\u00e9 pour am\u00e9liorer la r\u00e9sistance \u00e0 la corrosion atmosph\u00e9rique<\/td>\n<\/tr>\n<tr>\n<td>- Nickel (Ni)<\/td>\n<td>\u22640.50<\/td>\n<td>Am\u00e9liore la r\u00e9sistance \u00e0 la corrosion dans les environnements difficiles<\/td>\n<\/tr>\n<tr>\n<td>- Cuivre (Cu)<\/td>\n<td>0.20 - 0.50<\/td>\n<td>Critique pour la formation d'une couche de patine protectrice<\/td>\n<\/tr>\n<tr>\n<td>- Niobium (Nb)<\/td>\n<td>\u22640.07<\/td>\n<td>Microalliage pour l'affinement du grain<\/td>\n<\/tr>\n<tr>\n<td>- Vanadium (V)<\/td>\n<td>\u22640.15<\/td>\n<td>Am\u00e9liore la force et la r\u00e9sistance<\/td>\n<\/tr>\n<tr>\n<td>- Titane (Ti)<\/td>\n<td>\u22640.20<\/td>\n<td>Am\u00e9liore la stabilit\u00e9 structurelle<\/td>\n<\/tr>\n<tr>\n<td><strong>Propri\u00e9t\u00e9s m\u00e9caniques<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>- Limite d'\u00e9lasticit\u00e9 (ReL)<\/td>\n<td>\u2265345 MPa<\/td>\n<td>Pour une \u00e9paisseur \u226416mm<\/td>\n<\/tr>\n<tr>\n<td>- R\u00e9sistance \u00e0 la traction (Rm)<\/td>\n<td>470 - 630 MPa<\/td>\n<td>Assure l'int\u00e9grit\u00e9 structurelle sous charge<\/td>\n<\/tr>\n<tr>\n<td>- Allongement (A)<\/td>\n<td>\u226521%<\/td>\n<td>Assure la ductilit\u00e9 pour la fabrication<\/td>\n<\/tr>\n<tr>\n<td>- \u00c9nergie d'impact (Akv)<\/td>\n<td>\u226534 J<\/td>\n<td>\u00c0 20\u2103 (\u00e9chantillon longitudinal), r\u00e9siste \u00e0 la rupture fragile.<\/td>\n<\/tr>\n<tr>\n<td>- Essai de flexion<\/td>\n<td>180\u00b0<\/td>\n<td>Diam\u00e8tre de courbure : 2a (\u226416mm) \/ 3a (&gt;16mm)<\/td>\n<\/tr>\n<tr>\n<td><strong>R\u00e9sistance \u00e0 la corrosion<\/strong><\/td>\n<td>2 \u00e0 5 fois sup\u00e9rieur \u00e0 l'acier au carbone ordinaire<\/td>\n<td>Forme une patine dense et adh\u00e9rente (couche d'oxyde protectrice) dans les conditions atmosph\u00e9riques.<\/td>\n<\/tr>\n<tr>\n<td><strong>Conditions de livraison<\/strong><\/td>\n<td>Lamin\u00e9s \u00e0 chaud, normalis\u00e9s, TMCP<\/td>\n<td>La surface peut d\u00e9velopper une premi\u00e8re couche de rouille pendant le stockage<\/td>\n<\/tr>\n<tr>\n<td><strong>Applications typiques<\/strong><\/td>\n<td>Ponts, fa\u00e7ades de b\u00e2timents, structures ext\u00e9rieures, infrastructures de transport et \u00e9quipements industriels expos\u00e9s aux intemp\u00e9ries<\/td>\n<td>Id\u00e9al pour r\u00e9duire la maintenance et prolonger la dur\u00e9e de vie dans les environnements ext\u00e9rieurs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>La billette d'acier r\u00e9sistant aux intemp\u00e9ries Q345B est un acier faiblement alli\u00e9 haute performance con\u00e7u pour exceller dans les environnements ext\u00e9rieurs et difficiles, combinant la solidit\u00e9 du Q345B avec une r\u00e9sistance accrue \u00e0 la corrosion atmosph\u00e9rique. Conforme aux normes GB\/T 1591-2008 et GB\/T 4171-2008, cette billette forme une patine protectrice et auto-cicatrisante au fil du temps, \u00e9liminant le besoin de peintures ou de rev\u00eatements fr\u00e9quents, ce qui en fait un choix rentable et durable pour les applications ext\u00e9rieures \u00e0 long terme.<\/p>","protected":false},"featured_media":2542,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[26],"product_tag":[],"class_list":["post-2554","product","type-product","status-publish","has-post-thumbnail","product_cat-specialty-billets","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product\/2554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/comments?post=2554"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media\/2542"}],"wp:attachment":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media?parent=2554"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_brand?post=2554"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_cat?post=2554"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_tag?post=2554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}