{"id":2551,"date":"2025-09-18T00:55:10","date_gmt":"2025-09-18T00:55:10","guid":{"rendered":"https:\/\/greenyellow-gerbil-196913.hostingersite.com\/?post_type=product&p=2551"},"modified":"2025-09-18T01:02:00","modified_gmt":"2025-09-18T01:02:00","slug":"pipeline-steel-billet-q345b","status":"publish","type":"product","link":"https:\/\/baosteelmaterials.com\/fr\/produit\/pipeline-steel-billet-q345b\/","title":{"rendered":"Billet d'acier pour pipeline Q345B"},"content":{"rendered":"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Param\u00e8tres<\/th>\nValeur<\/th>\nRemarques<\/th>\n<\/tr>\n<\/thead>\n
Standard<\/strong><\/td>\nGB\/T 1591-2008<\/td>\nAcier de construction \u00e0 haute r\u00e9sistance faiblement alli\u00e9<\/td>\n<\/tr>\n
Grade<\/strong><\/td>\nQ345B<\/td>\nImpact test\u00e9 \u00e0 20\u2103<\/td>\n<\/tr>\n
Composition chimique (wt%)<\/strong><\/td>\n<\/td>\n<\/td>\n<\/tr>\n
- Carbone (C)<\/td>\n\u22640.20<\/td>\nContr\u00f4l\u00e9 pour la soudabilit\u00e9 dans les applications de pipelines<\/td>\n<\/tr>\n
- Silicium (Si)<\/td>\n\u22640.55<\/td>\n<\/td>\n<\/tr>\n
- Mangan\u00e8se (Mn)<\/td>\n\u22641.70<\/td>\nAm\u00e9liore la r\u00e9sistance et la robustesse<\/td>\n<\/tr>\n
- Phosphore (P)<\/td>\n\u22640.040<\/td>\nMinimis\u00e9 pour r\u00e9duire la fragilit\u00e9 dans le service des pipelines<\/td>\n<\/tr>\n
- Soufre (S)<\/td>\n\u22640.040<\/td>\nLa faible teneur garantit une bonne soudabilit\u00e9 et une bonne ductilit\u00e9.<\/td>\n<\/tr>\n
- Niobium (Nb)<\/td>\n\u22640.07<\/td>\nEl\u00e9ment de microalliage pour l'affinement du grain<\/td>\n<\/tr>\n
- Vanadium (V)<\/td>\n\u22640.15<\/td>\nAm\u00e9liore la solidit\u00e9 et la r\u00e9sistance \u00e0 la chaleur<\/td>\n<\/tr>\n
- Titane (Ti)<\/td>\n\u22640.20<\/td>\nAm\u00e9liore la t\u00e9nacit\u00e9 et la stabilit\u00e9 structurelle<\/td>\n<\/tr>\n
- Azote (N)<\/td>\n\u22640.012<\/td>\nContr\u00f4l\u00e9 pour \u00e9viter la fragilisation<\/td>\n<\/tr>\n
Propri\u00e9t\u00e9s m\u00e9caniques<\/strong><\/td>\n<\/td>\n<\/td>\n<\/tr>\n
- Limite d'\u00e9lasticit\u00e9 (ReL)<\/td>\n\u2265345 MPa<\/td>\nPour une \u00e9paisseur \u226416mm ; critique pour la r\u00e9sistance \u00e0 la pression<\/td>\n<\/tr>\n
- R\u00e9sistance \u00e0 la traction (Rm)<\/td>\n470-630 MPa<\/td>\nGarantit l'int\u00e9grit\u00e9 sous les pressions d'exploitation du pipeline<\/td>\n<\/tr>\n
- Allongement (A)<\/td>\n\u226521%<\/td>\nFlexibilit\u00e9 pour l'installation et l'extension des pipelines<\/td>\n<\/tr>\n
- \u00c9nergie d'impact (Akv)<\/td>\n\u226534 J<\/td>\n\u00c0 20\u2103 (\u00e9chantillon longitudinal), r\u00e9siste \u00e0 la rupture sous l'effet de charges dynamiques.<\/td>\n<\/tr>\n
- Essai de flexion<\/td>\n180\u00b0<\/td>\nDiam\u00e8tre de courbure : 2a (\u226416mm) \/ 3a (>16mm) pour la formation de composants de pipeline.<\/td>\n<\/tr>\n
Conditions de livraison<\/strong><\/td>\nLamin\u00e9s \u00e0 chaud, normalis\u00e9s, TMCP (Thermo-Mechanical Control Process)<\/td>\nAdapt\u00e9 aux exigences de fabrication des pipelines<\/td>\n<\/tr>\n
Applications typiques<\/strong><\/td>\nPipelines de transport de p\u00e9trole\/gaz, pipelines de transport d'eau, pipelines de fluides industriels et composants d'appareils \u00e0 pression<\/td>\nCon\u00e7ue pour les hautes pressions, les longues distances et les environnements difficiles<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"

Cette billette d'acier pour pipeline Q345B est con\u00e7ue pour \u00e9quilibrer la r\u00e9sistance, la soudabilit\u00e9 et la t\u00e9nacit\u00e9 - des exigences cl\u00e9s pour des syst\u00e8mes de pipeline fiables. Ses propri\u00e9t\u00e9s chimiques et m\u00e9caniques garantissent des performances sous pression interne, charges externes et contraintes environnementales, ce qui en fait un choix fiable pour les projets d'\u00e9nergie et d'infrastructure.<\/p>","protected":false},"featured_media":2528,"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-2551","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\/2551","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=2551"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media\/2528"}],"wp:attachment":[{"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/media?parent=2551"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_brand?post=2551"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_cat?post=2551"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/baosteelmaterials.com\/fr\/wp-json\/wp\/v2\/product_tag?post=2551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}