{"id":2555,"date":"2025-09-18T01:08:39","date_gmt":"2025-09-18T01:08:39","guid":{"rendered":"https:\/\/greenyellow-gerbil-196913.hostingersite.com\/?post_type=product&#038;p=2555"},"modified":"2025-09-18T01:35:54","modified_gmt":"2025-09-18T01:35:54","slug":"large-square-billet-200x200mm-q345b","status":"publish","type":"product","link":"https:\/\/baosteelmaterials.com\/fr\/produit\/large-square-billet-200x200mm-q345b\/","title":{"rendered":"Grande pi\u00e8ce carr\u00e9e 200x200mm 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<\/td>\n<td>Norme pour les aciers de construction \u00e0 haute r\u00e9sistance faiblement alli\u00e9s<\/td>\n<\/tr>\n<tr>\n<td><strong>Grade<\/strong><\/td>\n<td>Q345B<\/td>\n<td>Impact test\u00e9 \u00e0 20\u2103<\/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>Pour assurer une bonne soudabilit\u00e9 et une bonne formabilit\u00e9<\/td>\n<\/tr>\n<tr>\n<td>- Silicium (Si)<\/td>\n<td>\u22640.55<\/td>\n<td>Favorise la d\u00e9soxydation et influe sur la r\u00e9sistance et la t\u00e9nacit\u00e9.<\/td>\n<\/tr>\n<tr>\n<td>- Mangan\u00e8se (Mn)<\/td>\n<td>\u22641.70<\/td>\n<td>Am\u00e9lioration de la r\u00e9sistance et de la t\u00e9nacit\u00e9 de la billette<\/td>\n<\/tr>\n<tr>\n<td>- Phosphore (P)<\/td>\n<td>\u22640.040<\/td>\n<td>Maintenu \u00e0 un niveau bas pour \u00e9viter la fragilisation<\/td>\n<\/tr>\n<tr>\n<td>- Soufre (S)<\/td>\n<td>\u22640.040<\/td>\n<td>Faible contenu pour une meilleure qualit\u00e9 et une meilleure performance<\/td>\n<\/tr>\n<tr>\n<td>- Niobium (Nb)<\/td>\n<td>\u22640.07<\/td>\n<td>El\u00e9ment de 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 les propri\u00e9t\u00e9s de solidit\u00e9 et de r\u00e9sistance \u00e0 la chaleur<\/td>\n<\/tr>\n<tr>\n<td>- Titane (Ti)<\/td>\n<td>\u22640.20<\/td>\n<td>Contribue \u00e0 am\u00e9liorer la t\u00e9nacit\u00e9 et la stabilit\u00e9 structurelle<\/td>\n<\/tr>\n<tr>\n<td>- Azote (N)<\/td>\n<td>\u22640.012<\/td>\n<td>Contr\u00f4l\u00e9 pour \u00e9viter la fragilisation induite par l'azote<\/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 les sections dans la gamme de taille appropri\u00e9e, y compris cette billette carr\u00e9e, cruciale pour la r\u00e9sistance \u00e0 la charge.<\/td>\n<\/tr>\n<tr>\n<td>- R\u00e9sistance \u00e0 la traction (Rm)<\/td>\n<td>470-630 MPa<\/td>\n<td>Garantir l'int\u00e9grit\u00e9 structurelle globale dans diverses conditions de charge<\/td>\n<\/tr>\n<tr>\n<td>- Allongement (A)<\/td>\n<td>\u226521%<\/td>\n<td>Fournit la ductilit\u00e9 n\u00e9cessaire pour une \u00e9ventuelle d\u00e9formation au cours du traitement ou de l'utilisation.<\/td>\n<\/tr>\n<tr>\n<td>- \u00c9nergie d'impact (Akv)<\/td>\n<td>\u226534 J<\/td>\n<td>\u00c0 20\u2103 (\u00e9chantillon longitudinal), important pour r\u00e9sister \u00e0 un impact soudain et \u00e9viter une fracture fragile.<\/td>\n<\/tr>\n<tr>\n<td>- Essai de flexion<\/td>\n<td>180\u00b0<\/td>\n<td>Diam\u00e8tre de courbure : 2a pour \u226416mm ; 3a pour &gt;16mm (o\u00f9 \"a\" repr\u00e9sente la dimension pertinente comme l'\u00e9paisseur ou la longueur du c\u00f4t\u00e9 dans les cas appropri\u00e9s), pertinent pour les processus de fabrication.<\/td>\n<\/tr>\n<tr>\n<td><strong>Dimensions<\/strong><\/td>\n<td>200 x 200 mm (section carr\u00e9e)<\/td>\n<td>Taille nominale standard ; il peut y avoir des plages de tol\u00e9rance admissibles dans la production r\u00e9elle.<\/td>\n<\/tr>\n<tr>\n<td><strong>Longueur<\/strong><\/td>\n<td>Personnalisable en fonction des besoins sp\u00e9cifiques<\/td>\n<td>G\u00e9n\u00e9ralement fournis dans certaines longueurs selon les commandes des clients<\/td>\n<\/tr>\n<tr>\n<td><strong>Qualit\u00e9 de la surface<\/strong><\/td>\n<td>Il doit g\u00e9n\u00e9ralement \u00eatre exempt de fissures, de d\u00e9fauts de surface tels que des rayures profondes, etc.<\/td>\n<td>Respecter les normes de qualit\u00e9 en vue d'une transformation ou d'une application ult\u00e9rieure<\/td>\n<\/tr>\n<tr>\n<td><strong>Conditions de livraison<\/strong><\/td>\n<td>Lamin\u00e9s \u00e0 chaud, normalis\u00e9s, normalis\u00e9s + tremp\u00e9s, TMCP (Thermo-Mechanical Control Process)<\/td>\n<td>Sur la base des exigences sp\u00e9cifiques de fabrication et d'utilisation<\/td>\n<\/tr>\n<tr>\n<td><strong>Applications typiques<\/strong><\/td>\n<td>Composants structurels dans la construction, les ponts, les ch\u00e2ssis de machines lourdes et d'autres applications n\u00e9cessitant une r\u00e9sistance \u00e9lev\u00e9e et une bonne formabilit\u00e9.<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Le grand billet carr\u00e9 200x200mm Q345B est un produit robuste en acier faiblement alli\u00e9 \u00e0 haute r\u00e9sistance, con\u00e7u pour r\u00e9pondre aux exigences de la fabrication de structures \u00e0 grande \u00e9chelle et de la fabrication de machines lourdes. Conforme aux normes GB\/T 1591-2008, cette billette carr\u00e9e de 200x200mm combine une r\u00e9sistance, une formabilit\u00e9 et une soudabilit\u00e9 exceptionnelles, ce qui en fait une mati\u00e8re premi\u00e8re id\u00e9ale pour cr\u00e9er des composants durables et porteurs dans les projets de construction, d'infrastructure et industriels.<\/p>","protected":false},"featured_media":2557,"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":[27],"product_tag":[],"class_list":["post-2555","product","type-product","status-publish","has-post-thumbnail","product_cat-square-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\/2555","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=2555"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media\/2557"}],"wp:attachment":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media?parent=2555"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_brand?post=2555"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_cat?post=2555"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_tag?post=2555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}