{"id":5433,"date":"2026-08-14T08:53:01","date_gmt":"2026-08-14T08:53:01","guid":{"rendered":"https:\/\/beiyutitanium.com\/titanium-bar-heat-and-batch-acceptance\/"},"modified":"2026-08-15T01:47:35","modified_gmt":"2026-08-15T01:47:35","slug":"titanium-bar-heat-and-batch-acceptance","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/fr\/titanium-bar-heat-and-batch-acceptance\/","title":{"rendered":"Par coul\u00e9e ou par lot : niveau d'acceptation des barres en titane"},"content":{"rendered":"
\"Representative<\/figure>\n

Une coul\u00e9e peut arriver sous forme de plusieurs lots<\/h2>\n

Une coul\u00e9e correspond \u00e0 la fusion. Un lot correspond \u00e0 ce qui a \u00e9t\u00e9 trait\u00e9 ensemble ensuite. Une m\u00eame coul\u00e9e peut \u00eatre r\u00e9partie entre des lots qui ont \u00e9t\u00e9 recuits, travaill\u00e9s ou finis s\u00e9par\u00e9ment, et les r\u00e9sultats m\u00e9caniques sont rapport\u00e9s pour chacun d'eux. D\u00e9cider du niveau auquel vous acceptez le mat\u00e9riau est une d\u00e9cision de commande, et non une question \u00e0 r\u00e9gler lorsque le certificat mati\u00e8re arrive.<\/p>\n\n\n\n\n\n\n\n
Niveau<\/th>\nCe qu'il identifie<\/th>\n<\/tr>\n<\/thead>\n
Coul\u00e9e<\/td>\nLa fusion dont provient le mat\u00e9riau<\/td>\n<\/tr>\n
Lot<\/td>\nLe mat\u00e9riau trait\u00e9 ensemble apr\u00e8s la fusion<\/td>\n<\/tr>\n
Pi\u00e8ce<\/td>\nLa barre individuelle telle que marqu\u00e9e et livr\u00e9e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Quelles propri\u00e9t\u00e9s rel\u00e8vent de quel niveau<\/h2>\n

Cette distinction d\u00e9termine le nombre de rapports d'essai que vous devriez attendre.<\/p>\n\n\n\n\n\n\n\n
Propri\u00e9t\u00e9<\/th>\nNiveau auquel il appartient<\/th>\n<\/tr>\n<\/thead>\n
Composition chimique<\/td>\nUne propri\u00e9t\u00e9 de la coul\u00e9e, indiqu\u00e9e par num\u00e9ro de coul\u00e9e<\/td>\n<\/tr>\n
Propri\u00e9t\u00e9s m\u00e9caniques<\/td>\nInfluenc\u00e9e par le traitement, indiqu\u00e9e par lot<\/td>\n<\/tr>\n
R\u00e9sultats dimensionnels et de surface<\/td>\nPar pi\u00e8ce lorsque le contr\u00f4le est effectu\u00e9 \u00e0 100 pour cent<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pourquoi une m\u00eame coul\u00e9e peut pr\u00e9senter des r\u00e9sultats m\u00e9caniques diff\u00e9rents<\/h2>\n

Les lots issus d'une m\u00eame coul\u00e9e ont la m\u00eame composition chimique, mais pas n\u00e9cessairement un historique de traitement identique. Les valeurs indiqu\u00e9es respectent les minimums de la sp\u00e9cification et ne sont pas cens\u00e9es \u00eatre identiques d'un lot \u00e0 l'autre.<\/p>\n\n\n\n\n\n\n\n
Ce qui varie entre les lots issus d'une m\u00eame coul\u00e9e<\/th>\n<\/tr>\n<\/thead>\n
Le parcours de traitement effectivement suivi par le lot<\/td>\n<\/tr>\n
L'\u00e9tat de livraison auquel il a \u00e9t\u00e9 fini<\/td>\n<\/tr>\n
La dimension de section au point d'essai<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Les champs \u00e0 indiquer lorsque vous demandez des r\u00e9sultats par lot<\/h2>\n

Les champs figurant sur le certificat<\/a> est d\u00e9fini par la sp\u00e9cification command\u00e9e et par les exigences de la commande. Ce sont ceux que les acheteurs travaillant selon une sp\u00e9cification pour implants ou appareils \u00e0 pression d\u00e9signent normalement<\/a>.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Champ \u00e0 indiquer sur la commande<\/th>\nCe qu'il consigne<\/th>\n<\/tr>\n<\/thead>\n
R\u00e9sistance \u00e0 la traction<\/td>\nValeur mesur\u00e9e par rapport au minimum de la sp\u00e9cification<\/td>\n<\/tr>\n
Limite d'\u00e9lasticit\u00e9<\/td>\nValeur mesur\u00e9e par rapport au minimum de la sp\u00e9cification<\/td>\n<\/tr>\n
Allongement<\/td>\nValeur mesur\u00e9e par rapport au minimum de la sp\u00e9cification<\/td>\n<\/tr>\n
R\u00e9duction de section<\/td>\nValeur mesur\u00e9e lorsque la sp\u00e9cification l'exige<\/td>\n<\/tr>\n
Teneur en hydrog\u00e8ne<\/td>\nValeur mesur\u00e9e par rapport au maximum de la sp\u00e9cification<\/td>\n<\/tr>\n
Microstructure<\/td>\n\u00c9valu\u00e9 lorsque la commande l'exige<\/td>\n<\/tr>\n
R\u00e9sultat du contr\u00f4le par ultrasons<\/td>\nR\u00e9sultat du contr\u00f4le command\u00e9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Comment indiquer le niveau d'acceptation sur la commande<\/h2>\n

Une commande indiquant “certificat d'essai requis” ne pr\u00e9cise pas \u00e0 quel niveau l'acceptation est \u00e9valu\u00e9e. Voici les trois formulations habituelles.<\/p>\n\n\n\n\n\n\n\n
La commande indique<\/th>\nCe \u00e0 quoi cela engage l'usine<\/th>\n<\/tr>\n<\/thead>\n
Par coul\u00e9e<\/td>\nUn ensemble de r\u00e9sultats couvrant tous les produits issus de cette coul\u00e9e<\/td>\n<\/tr>\n
Par lot<\/td>\nR\u00e9sultats pour chaque lot trait\u00e9 au sein de la coul\u00e9e<\/td>\n<\/tr>\n
Par coul\u00e9e et par lot<\/td>\nComposition chimique au niveau de la coul\u00e9e, r\u00e9sultats m\u00e9caniques au niveau du lot<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Lignes \u00e0 copier dans votre commande<\/h2>\n
Niveau de d\u00e9claration de la composition chimique : ______ (indiquer par coul\u00e9e et si l'analyse du lingot est \u00e9galement requise) Niveau de d\u00e9claration des r\u00e9sultats m\u00e9caniques : ______ (indiquer par coul\u00e9e ou par lot) Caract\u00e9ristiques \u00e0 d\u00e9clarer : ______ (traction, limite d'\u00e9lasticit\u00e9, allongement, striction, hydrog\u00e8ne, microstructure) R\u00e9sultats de contr\u00f4le \u00e0 d\u00e9clarer : ______ (indiquer chaque contr\u00f4le avec sa norme et sa classe d'acceptation) Tra\u00e7abilit\u00e9 : l'identification de la coul\u00e9e et du lot doit figurer sur le certificat et sur le marquage du mat\u00e9riau Lots mixtes : ______ (indiquer si du mat\u00e9riau provenant de plus d'une coul\u00e9e peut \u00eatre exp\u00e9di\u00e9 pour une m\u00eame ligne)<\/pre>\n
La derni\u00e8re ligne est celle qui est le plus souvent omise. Indiquez si une seule ligne de commande peut \u00eatre fournie \u00e0 partir de plus d'une coul\u00e9e, car cela d\u00e9termine comment les certificats et le marquage doivent \u00eatre organis\u00e9s<\/a> avant l'exp\u00e9dition du mat\u00e9riau.<\/p>\n
\n
D\u00e9tails des sp\u00e9cifications avec sources<\/h2>\n
La norme produit fixe ce qui est \u00e9chantillonn\u00e9 et rapport\u00e9, d'abord au niveau de la coul\u00e9e. ASTM B348<\/a> exige, au minimum, que l'analyse des \u00e9chantillons pr\u00e9lev\u00e9s en haut et en bas du lingot soit r\u00e9alis\u00e9e et rapport\u00e9e pour tous les \u00e9l\u00e9ments list\u00e9s pour la nuance (ASTM B348, exigences chimiques, notes de tableau). Elle exige \u00e9galement que l'hydrog\u00e8ne soit rapport\u00e9 sur le produit fini, alors que l'hydrog\u00e8ne du lingot ne doit pas n\u00e9cessairement l'\u00eatre, et pr\u00e9cise que les tol\u00e9rances d'analyse du produit n'\u00e9largissent pas les exigences d'analyse de coul\u00e9e mais couvrent uniquement les variations entre laboratoires (ASTM B348, analyse du produit).<\/p>\n\n\n\n\n\n\n\n\n
Niveau<\/th>\nCe qu'ASTM B348 fixe \u00e0 ce niveau<\/th>\n<\/tr>\n<\/thead>\n
Lingot, par coul\u00e9e<\/td>\nAnalyse du haut et du bas r\u00e9alis\u00e9e et rapport\u00e9e pour les \u00e9l\u00e9ments list\u00e9s<\/td>\n<\/tr>\n
Produit fini<\/td>\nHydrog\u00e8ne rapport\u00e9 sur le produit fini<\/td>\n<\/tr>\n
Analyse du produit<\/td>\nLes tol\u00e9rances couvrent les variations interlaboratoires, et non une limite de coul\u00e9e plus large<\/td>\n<\/tr>\n
Niveau d'acceptation<\/td>\nIndiqu\u00e9 par l'acheteur sur la commande<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Ce que cela donne en pratique est visible dans la propre documentation de production de Beiyu. Pour une coul\u00e9e repr\u00e9sentative de Ti-6Al-4V, r\u00e9partie sur quatre lots transform\u00e9s, la r\u00e9sistance \u00e0 la traction d\u00e9clar\u00e9e allait de 961 \u00e0 1082 MPa et la striction de 42 \u00e0 55 pour cent, chaque lot \u00e9tant sup\u00e9rieur aux minima de sp\u00e9cification pour implant de 860 MPa en traction et 795 MPa en limite d'\u00e9lasticit\u00e9 selon lesquels la commande a \u00e9t\u00e9 \u00e9valu\u00e9e. Il s'agit de r\u00e9sultats pour une coul\u00e9e et ses lots, non d'une sp\u00e9cification g\u00e9n\u00e9rale, et ils sont d\u00e9clar\u00e9s par lot pr\u00e9cis\u00e9ment parce que les lots issus d'une m\u00eame coul\u00e9e ne doivent pas \u00eatre identiques. Les essais de traction suivent ASTM E8 \u00e0 une vitesse de d\u00e9formation de 0.003 \u00e0 0.007 pouce par pouce par minute jusqu'\u00e0 la limite d'\u00e9lasticit\u00e9 sp\u00e9cifi\u00e9e (ASTM B348, propri\u00e9t\u00e9s m\u00e9caniques).<\/p>\n
Envoyer une demande de prix technique<\/h2>\n
Pour les demandes de prix de barres en titane, indiquez si l'acceptation est \u00e9valu\u00e9e par coul\u00e9e ou par lot, si une ligne peut \u00eatre approvisionn\u00e9e \u00e0 partir de plus d'une coul\u00e9e, ainsi que la nuance, la norme, le diam\u00e8tre, l'\u00e9tat, l'\u00e9tendue du contr\u00f4le et le dossier de certificats requis.<\/p>\n
Envoyer les d\u00e9tails de la demande de prix<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
One heat can arrive as several batches A heat is the melt. A batch is what was processed together afterwards. A single heat can be split across batches that were annealed, worked or finished separately, and the mechanical results are reported for each of them. Deciding which level you accept against is an order decision, […]<\/p>\n","protected":false},"author":2,"featured_media":5485,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-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":"","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-4)","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-4)","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-4)","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":""}},"footnotes":""},"categories":[27,137],"tags":[],"class_list":["post-5433","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-technical-guides"],"yoast_head":"\nPer Heat or Per Batch: Titanium Bar Acceptance Level<\/title>\n<meta name=\"description\" content=\"Chemistry belongs to the melt, mechanical results are affected by processing. See which properties sit at which level and how to write the acceptance level on the order.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/beiyutitanium.com\/fr\/titanium-bar-heat-and-batch-acceptance\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Per Heat or Per Batch: Titanium Bar Acceptance Level\" \/>\n<meta property=\"og:description\" content=\"Chemistry belongs to the melt, mechanical results are affected by processing. 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Production runs through the Beiyu titanium mill in Baoji, Shaanxi. 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