{"id":4507,"date":"2026-06-23T14:14:37","date_gmt":"2026-06-23T14:14:37","guid":{"rendered":"https:\/\/beiyutitanium.com\/grade-1-titanium-cp-uns-r50250\/"},"modified":"2026-08-18T04:47:18","modified_gmt":"2026-08-18T04:47:18","slug":"grade-1-titanium-cp-uns-r50250","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/fr\/grade-1-titanium-cp-uns-r50250\/","title":{"rendered":"Titane Grade 1 (titane CP, UNS R50250) : propri\u00e9t\u00e9s, formabilit\u00e9 et quand l'utiliser"},"content":{"rendered":"

<\/p>\n

Grade 1 est le titane commercialement pur le plus mou, UNS R50250, Werkstoff 3.7025. ASTM B265 fixe une r\u00e9sistance \u00e0 la traction minimale de 240 MPa avec un allongement minimal de 24 % et limite l'oxyg\u00e8ne \u00e0 0,18 wt%. Cette combinaison en fait la nuance adapt\u00e9e \u00e0 l'emboutissage profond, au placage, aux plaques assembl\u00e9es par soudage explosif et au fil.<\/p>\n

<\/p>\n

Le titane Grade 1 est le plus tendre et le plus formable des nuances commercialement pures. Il pr\u00e9sente la r\u00e9sistance la plus faible des titanes CP, mais la meilleure ductilit\u00e9 et r\u00e9sistance \u00e0 la corrosion, ce qui en fait la nuance de choix pour les pi\u00e8ces embouties profond\u00e9ment, le placage et le fil. Cette page pr\u00e9sente ce qu'est le Grade 1, ses performances, sa comparaison avec le Grade 2 et le Grade 5, et quand le sp\u00e9cifier.<\/p>\n

<\/p>\n

D\u00e9signation europ\u00e9enne :<\/strong> Dans le syst\u00e8me EN et DIN, il s'agit de Werkstoff 3.7025; selon ASTM, il s'agit d'UNS R50250 (CP Grade 1), barre selon ASTM B348 ou DIN 17862, t\u00f4le selon ASTM B265 ou DIN 17860.<\/p>\n

<\/p>\n

D\u00e9signation fran\u00e7aise :<\/strong> Un plan fran\u00e7ais peut d\u00e9signer cette nuance par T35, le code fran\u00e7ais de la nuance \u00e9crite UNS R50250 en ASTM et Werkstoff 3.7025 en EN et DIN.<\/p>\n

<\/p>\n

Ce qu'est le titane Grade 1<\/h2>\n

Grade 1 est un titane commercialement pur, UNS R50250, pr\u00e9sentant les plus faibles teneurs en oxyg\u00e8ne et en fer parmi les nuances CP. Une teneur plus faible en \u00e9l\u00e9ments interstitiels signifie une r\u00e9sistance moindre mais une ductilit\u00e9 sup\u00e9rieure, de sorte que le m\u00e9tal s'\u00e9tire, se plie et se soude facilement. Beiyu fournit Grade 1 en t\u00f4le, plaque, tube et fil conform\u00e9ment \u00e0 la norme ASTM applicable, et examine chaque demande selon la forme, les dimensions et l'\u00e9tat demand\u00e9s avant de soumettre une offre.<\/p>\n\n\n\n\n\n\n\n\n\n
La valeur minimale de limite d'\u00e9lasticit\u00e9 n'est volontairement pas indiqu\u00e9e ici sous forme de tableau : deux chiffres publi\u00e9s circulent pour cette nuance et celui applicable d\u00e9pend de la norme command\u00e9e, prenez donc celui figurant dans la norme indiqu\u00e9e sur votre commande.<\/caption>\n
Champ<\/th>\nValeur indiqu\u00e9e par le guide<\/th>\n<\/tr>\n<\/thead>\n
Mat\u00e9riau<\/td>\nTitane commercialement pur, le plus faible en oxyg\u00e8ne et en fer des nuances CP<\/td>\n<\/tr>\n
UNS<\/td>\nR50250<\/td>\n<\/tr>\n
Oxyg\u00e8ne<\/td>\nMaintenu \u00e0 0,18 wt%<\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction minimale<\/td>\n240 MPa (35 ksi), selon ASTM B265 Tableau 2<\/td>\n<\/tr>\n
Allongement minimal<\/td>\n24 pour cent, selon ASTM B265 Tableau 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Propri\u00e9t\u00e9s m\u00e9caniques<\/h2>\n

\u00c0 l'\u00e9tat recuit, Grade 1 pr\u00e9sente une r\u00e9sistance \u00e0 la traction ASTM minimale proche de 240 MPa (35 ksi) et une limite d'\u00e9lasticit\u00e9 minimale de 138 MPa (20 ksi), avec un allongement d'environ 24 pour cent. Il s'agit de la nuance CP la moins r\u00e9sistante mais la plus ductile, ce qui la rend utile pour le formage. Les valeurs r\u00e9elles sont confirm\u00e9es pour chaque num\u00e9ro de coul\u00e9e sur le certificat de r\u00e9ception 3.1 selon EN 10204.<\/p>\n\n\n\n\n\n\n\n\n
Propri\u00e9t\u00e9<\/th>\nGrade 1 (titane CP, R50250)<\/th>\n<\/tr>\n<\/thead>\n
R\u00e9sistance \u00e0 la traction (min, recuit)<\/td>\n240 MPa \/ 35 ksi<\/td>\n<\/tr>\n
Limite d'\u00e9lasticit\u00e9 (min, recuit)<\/td>\n170 MPa \/ 25 ksi<\/td>\n<\/tr>\n
Allongement (min)<\/td>\n24 %<\/td>\n<\/tr>\n
Caract\u00e9ristique cl\u00e9<\/td>\nformabilit\u00e9 et ductilit\u00e9 maximales<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

R\u00e9sistance \u00e0 la corrosion<\/h2>\n

Le Grade 1 poss\u00e8de le m\u00eame film d'oxyde de titane que les autres nuances CP, il r\u00e9siste donc bien \u00e0 l'eau de mer, aux acides oxydants, aux chlorures et \u00e0 la plupart des eaux naturelles. Son comportement \u00e0 la corrosion est proche de celui du Grade 2 ; les acheteurs choisissent le Grade 1 plut\u00f4t que le Grade 2 pour le formage et la ductilit\u00e9, non pour une diff\u00e9rence de corrosion. Pour les acides r\u00e9ducteurs ou le service de corrosion caverneuse en saumure chaude, le Grade 7 ou le Grade 12 sont les meilleures r\u00e9ponses.<\/p>\n

Grade 1 ou Grade 2<\/h2>\n

Le Grade 2 est la nuance CP polyvalente de r\u00e9f\u00e9rence, avec une r\u00e9sistance \u00e0 la traction minimale de 345 MPa et un \u00e9quilibre entre r\u00e9sistance et r\u00e9sistance \u00e0 la corrosion. Le Grade 1 \u00e9change de la r\u00e9sistance contre de la ductilit\u00e9 : il s'emboutit plus profond\u00e9ment et tol\u00e8re des pliages plus serr\u00e9s. Sp\u00e9cifier le Grade 1 lorsqu'une pi\u00e8ce doit \u00eatre embouti ou form\u00e9e fortement ; sp\u00e9cifier le Grade 2 lorsqu'elle n\u00e9cessite plus de r\u00e9sistance, et c'est le choix par d\u00e9faut pour la plupart des services anticorrosion.<\/p>\n\n\n\n\n\n\n
Compar\u00e9 \u00e0<\/th>\nCe que le guide indique<\/th>\n<\/tr>\n<\/thead>\n
Grade 2<\/td>\nGrade 2 est la nuance CP polyvalente de r\u00e9f\u00e9rence avec une r\u00e9sistance \u00e0 la traction minimale de 345 MPa, offrant un \u00e9quilibre entre r\u00e9sistance et r\u00e9sistance \u00e0 la corrosion. Grade 1 sacrifie la r\u00e9sistance au profit de la ductilit\u00e9 : il permet un formage plus profond et supporte des pliages plus serr\u00e9s<\/td>\n<\/tr>\n
Grade 5<\/td>\nGrade 5 (Ti-6Al-4V) est l'alliage \u00e0 haute r\u00e9sistance, \u00e0 environ 895 MPa, utilis\u00e9 pour les pi\u00e8ces usin\u00e9es et structurelles. Grade 1 se situe \u00e0 l'oppos\u00e9 : faible r\u00e9sistance, forte aptitude au formage, r\u00e9sistance totale \u00e0 la corrosion. Ils sont rarement en concurrence pour la m\u00eame application<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Grade 1 ou Grade 5<\/h2>\n

Le Grade 5 (Ti-6Al-4V) est l'alliage \u00e0 haute r\u00e9sistance, \u00e0 environ 895 MPa, utilis\u00e9 pour les pi\u00e8ces usin\u00e9es et structurelles. Le Grade 1 se situe \u00e0 l'oppos\u00e9 : faible r\u00e9sistance, formabilit\u00e9 \u00e9lev\u00e9e, pleine r\u00e9sistance \u00e0 la corrosion. Ils sont rarement en concurrence pour le m\u00eame usage. Choisir le Grade 5 lorsque la r\u00e9sistance prime, et le Grade 1 lorsque le formage et la ductilit\u00e9 priment.<\/p>\n

Applications typiques<\/h2>\n

Le Grade 1 est utilis\u00e9 pour les pi\u00e8ces embouties profond\u00e9ment et estamp\u00e9es, les plaques plaqu\u00e9es par explosion, les substrats d'anode, et comme fil de soudage ERTi-1 pour l'assemblage du titane CP. Il appara\u00eet aussi dans les \u00e9changeurs de chaleur et les \u00e9quipements chimiques o\u00f9 la formabilit\u00e9 compte plus que la r\u00e9sistance. La majorit\u00e9 de sa demande concerne la t\u00f4le, la plaque et le fil plut\u00f4t que la barre.<\/p>\n\n\n\n\n\n\n\n\n\n
Application indiqu\u00e9e dans le guide<\/th>\nD\u00e9tail<\/th>\n<\/tr>\n<\/thead>\n
Pi\u00e8ces embouties profondes et press\u00e9es<\/td>\nLorsque l'aptitude au formage est d\u00e9terminante<\/td>\n<\/tr>\n
Plaque plaqu\u00e9e par explosion<\/td>\nMat\u00e9riau de placage<\/td>\n<\/tr>\n
Substrats d'anode<\/td>\nMat\u00e9riau de substrat<\/td>\n<\/tr>\n
Fil de soudage ERTi-1<\/td>\nPour l'assemblage de titane commercialement pur<\/td>\n<\/tr>\n
\u00c9changeurs de chaleur et \u00e9quipements chimiques<\/td>\nLorsque l'aptitude au formage importe davantage que la r\u00e9sistance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Formes et normes<\/h2>\n

Associez Grade 1 \u00e0 la fois \u00e0 une forme de produit et \u00e0 sa sp\u00e9cification applicable : t\u00f4le et plaque<\/a> selon ASTM B265, tube<\/a> selon ASTM B338, barre selon ASTM B348 et fil selon ASTM B863 ou AWS A5.16 lorsqu'il est command\u00e9 comme m\u00e9tal d'apport ERTi-1. Associez la nuance et la norme \u00e0 l'\u00e9paisseur ou au diam\u00e8tre, \u00e0 la largeur ou \u00e0 la longueur, \u00e0 l'\u00e9tat de surface et \u00e0 la quantit\u00e9. Pour les consommables de soudage, comparez la guide du fil de soudage en titane<\/a> avec la page produit du fil de soudage et des baguettes d'apport ERTi<\/a>.<\/p>\n\n\n\n\n\n\n\n\n
Forme<\/th>\nNorme cit\u00e9e par le guide<\/th>\n<\/tr>\n<\/thead>\n
T\u00f4le et plaque<\/td>\nASTM B265<\/td>\n<\/tr>\n
Tube<\/td>\nASTM B338<\/td>\n<\/tr>\n
Barre<\/td>\nASTM B348<\/td>\n<\/tr>\n
Fil<\/td>\nASTM B863, ou AWS A5.16 lorsqu'il est command\u00e9 comme m\u00e9tal d'apport ERTi-1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Co\u00fbt et comment le sp\u00e9cifier<\/h2>\n

Pour des dimensions courantes comparables, Grade 1 et Grade 2 font souvent l'objet d'offres dans la m\u00eame large fourchette de prix. Grade 1 est parfois propos\u00e9 l\u00e9g\u00e8rement en dessous de Grade 2 lorsqu'une coul\u00e9e et une dimension adapt\u00e9es sont d\u00e9j\u00e0 au programme, et au-dessus dans le cas contraire. Sa demande plus faible peut n\u00e9cessiter une production sp\u00e9ciale, tandis que la forme, la dimension, l'\u00e9tat, la quantit\u00e9, les exigences de contr\u00f4le et les conditions de livraison influencent \u00e9galement la comparaison.<\/p>\n

Questions courantes<\/h2>\n

\u00c0 quoi sert le titane Grade 1 ?<\/strong> Pi\u00e8ces embouties profond\u00e9ment et form\u00e9es, placage par explosion, substrats d'anode, et fil de soudage ERTi-1, l\u00e0 o\u00f9 la formabilit\u00e9 et la r\u00e9sistance \u00e0 la corrosion comptent plus que la r\u00e9sistance m\u00e9canique.<\/p>\n

Le Grade 1 est-il identique au Grade 2 ?<\/strong> Non. Les deux sont commercialement purs, mais le Grade 1 est plus tendre et plus ductile, avec une r\u00e9sistance plus faible ; le Grade 2 pr\u00e9sente plus de r\u00e9sistance et est le choix par d\u00e9faut g\u00e9n\u00e9ral.<\/p>\n

Le Grade 1 est-il performant contre la corrosion ?<\/strong> Oui. Sa r\u00e9sistance \u00e0 la corrosion est \u00e9quivalente \u00e0 celle du Grade 2 en eau de mer, en pr\u00e9sence de chlorures et en milieux oxydants.<\/p>\n

Quelle norme couvre le fil Grade 1 ?<\/strong> L'ASTM B863 couvre le fil en titane, et l'AWS A5.16 r\u00e9pertorie le Grade 1 comme m\u00e9tal d'apport de soudage ERTi-1.<\/p>\n

Beiyu Titanium est la marque internationale d'exportation de titane de Jiaxing Beiyu New Materials Technology Co., Ltd., avec une base de production \u00e0 Baoji, Shaanxi. Pour une demande de prix de titane Grade 1, envoyez la forme du produit, la norme ASTM, les dimensions et tol\u00e9rances, l'\u00e9tat, la quantit\u00e9, l'application et toute exigence relative aux documents de contr\u00f4le ou \u00e0 la tra\u00e7abilit\u00e9 \u00e0 penn@beiyutitanium.com. Consultez la gamme de mat\u00e9riaux en titane<\/a> pour choisir la fili\u00e8re de produit pertinente. Pour comparer d'abord les nuances, consultez la guide de comparaison des nuances de titane<\/a> et le page titane Grade 2<\/a>.<\/p>\n

<\/p>\n

Ce qui distingue Grade 1 des nuances voisines, et comment cela est mesur\u00e9<\/h2>\n

Grade 1 est la plus souple et la plus formable des nuances commercialement pures, et ce qui la situe ainsi est un ensemble de limites relatives aux \u00e9l\u00e9ments interstitiels plut\u00f4t qu'une gamme de transformation. Puisque la limite est un nombre, la m\u00e9thode qui sous-tend ce nombre fait partie de la base d'acceptation.<\/p>\n\n\n\n\n\n\n\n\n
Ce qui est rapport\u00e9<\/th>\nM\u00e9thode \u00e0 laquelle la sp\u00e9cification fait r\u00e9f\u00e9rence<\/th>\nPourquoi cela importe pour cette nuance<\/th>\n<\/tr>\n<\/thead>\n
Oxyg\u00e8ne et azote<\/td>\nASTM E1409<\/td>\nL'oxyg\u00e8ne est le principal facteur qui distingue Grade 1 de Grade 2<\/td>\n<\/tr>\n
Hydrog\u00e8ne<\/td>\nASTM E1447<\/td>\nLa limite la plus stricte du groupe et la moins visible en atelier<\/td>\n<\/tr>\n
Carbone<\/td>\nASTM E1941<\/td>\nRapport\u00e9s par combustion plut\u00f4t que par une technique non pr\u00e9cis\u00e9e<\/td>\n<\/tr>\n
Arrondi des valeurs d\u00e9clar\u00e9es<\/td>\nASTM E29<\/td>\nD\u00e9termine si une valeur interstitielle limite est accept\u00e9e ou non<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

La d\u00e9signation d'une m\u00e9thode \u00e9tablit comment une valeur a \u00e9t\u00e9 obtenue. Elle n'ajoute pas un examen que la commande n'a pas demand\u00e9.<\/p>\n

Ce qu'une commande de Grade 1 devrait comporter au-del\u00e0 de la nuance<\/h2>\n\n\n\n\n\n\n\n\n
Ligne<\/th>\nPourquoi cela importe ici<\/th>\n<\/tr>\n<\/thead>\n
Norme applicable avec la nuance<\/td>\nLes limites rel\u00e8vent de la sp\u00e9cification, et non du seul nom de la nuance<\/td>\n<\/tr>\n
Forme du produit et dimension d\u00e9terminante<\/td>\nD\u00e9termine quel tableau de tol\u00e9rances s'applique<\/td>\n<\/tr>\n
Condition de livraison<\/td>\nLa formabilit\u00e9 est la raison pour laquelle Grade 1 a \u00e9t\u00e9 choisi, la condition n'est donc pas accessoire<\/td>\n<\/tr>\n
P\u00e9rim\u00e8tre des informations rapport\u00e9es<\/td>\nD\u00e9termine ce qui appara\u00eet au-del\u00e0 des r\u00e9sultats d\u00e9j\u00e0 exig\u00e9s par la sp\u00e9cification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beiyu fournit Grade 1 avec un certificat de r\u00e9ception 3.1 selon EN 10204 et une tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e, le p\u00e9rim\u00e8tre de rapport \u00e9tant d\u00e9fini par la commande.<\/p>\n

D\u00e9tails des sp\u00e9cifications avec sources<\/h2>\n

Grade 1 (UNS R50250) est la nuance non alli\u00e9e la plus tendre : r\u00e9sistance \u00e0 la traction minimale de 240 MPa (35 ksi) et allongement minimal de 24%, selon ASTM B265, Tableau 2. La limite d'\u00e9lasticit\u00e9 minimale diff\u00e8re selon les \u00e9ditions publi\u00e9es et entre les sp\u00e9cifications industrielles et pour implants, prenez donc celle indiqu\u00e9e dans la norme et l'\u00e9dition mentionn\u00e9es sur votre commande.<\/p>\n

L'aptitude \u00e0 la mise en forme provient des limites d'\u00e9l\u00e9ments interstitiels les plus strictes des nuances CP, avec l'oxyg\u00e8ne limit\u00e9 \u00e0 0,18% selon ASTM B265, Tableau 1, contre 0,25% pour Grade 2. La d\u00e9signation europ\u00e9enne \u00e9quivalente est Werkstoff 3.7025 dans DIN 17850.<\/p>\n

<\/p>","protected":false},"excerpt":{"rendered":"

Grade 1 is the softest commercially pure titanium, UNS R50250, Werkstoff 3.7025. ASTM B265 sets 240 MPa minimum tensile strength with 24 percent minimum elongation and holds oxygen to 0.18 wt%. That combination makes it the grade for deep drawing, cladding, explosive-bonded plate and wire. Grade 1 titanium is the softest and most formable of 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Ce travail reposait sur des plans de contr\u00f4le et d'essais, la certification des mat\u00e9riaux et la tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e, la coordination du contr\u00f4le par tierce partie, ainsi que le contr\u00f4le de la documentation et des dossiers de projet. Ce sont les quatre m\u00eames \u00e9l\u00e9ments qu'un acheteur de l'industrie des proc\u00e9d\u00e9s ou un acheteur soumis \u00e0 r\u00e9glementation exigera d'un fournisseur de titane, et le fait d'avoir d\u00fb les faire appliquer en tant que client explique qu'ils soient trait\u00e9s ici comme faisant partie de la fourniture plut\u00f4t que comme des documents produits ult\u00e9rieurement. Son travail quotidien couvre les questions auxquelles ce site est destin\u00e9 \u00e0 r\u00e9pondre : choisir entre des nuances de titane commercialement pur et alli\u00e9 pour un service corrosif, lire un certificat mati\u00e8re par rapport \u00e0 la norme command\u00e9e, et faire correspondre la d\u00e9signation d'un acheteur (nuance ASTM, UNS, num\u00e9ro Werkstoff allemand ou code NF fran\u00e7ais) au m\u00eame m\u00e9tal sur diff\u00e9rents march\u00e9s. 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