{"id":4505,"date":"2026-06-23T14:06:11","date_gmt":"2026-06-23T14:06:11","guid":{"rendered":"https:\/\/beiyutitanium.com\/grade-9-titanium-ti-3al-2-5v-uns-r56320\/"},"modified":"2026-08-18T04:47:18","modified_gmt":"2026-08-18T04:47:18","slug":"grade-9-titanium-ti-3al-2-5v-uns-r56320","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/fr\/grade-9-titanium-ti-3al-2-5v-uns-r56320\/","title":{"rendered":"Titane Grade 9 (Ti-3Al-2.5V, UNS R56320) : propri\u00e9t\u00e9s, usage en tube et quand le choisir"},"content":{"rendered":"

<\/p>\n

Le titane Grade 9 est Ti-3Al-2.5V, UNS R56320, Werkstoff 3.7195. La r\u00e9sistance minimale \u00e0 la traction est d'environ 620 MPa, contre 345 MPa pour Grade 2 et 895 MPa pour Grade 5. Il reste formable \u00e0 froid et soudable \u00e0 cette r\u00e9sistance, raison pour laquelle c'est la nuance la plus souvent \u00e9tir\u00e9e en tube.<\/p>\n

<\/p>\n

Le titane Grade 9 se situe entre le Grade 2 commercialement pur et le Ti-6Al-4V du Grade 5. Il offre une r\u00e9sistance sup\u00e9rieure au titane CP tout en restant formable et soudable, ce qui en fait la nuance la plus souvent \u00e9tir\u00e9e en tube. Cette page pr\u00e9sente ce qu'est le Grade 9, 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 3.7195 (Ti-3Al-2.5V) ; dans ASTM, il s'agit d'UNS R56320 (Grade 9).<\/p>\n

Ce qu'est le titane Grade 9<\/h2>\n

Le Grade 9 est l'alliage Ti-3Al-2.5V, UNS R56320 : environ 3 % d'aluminium et 2,5 % de vanadium, le reste \u00e9tant du titane. Ce faible ajout d'alliage augmente la r\u00e9sistance au-dessus des nuances CP sans atteindre la teneur totale en alliage du Grade 5, de sorte que le m\u00e9tal se travaille encore \u00e0 froid et se soude. Beiyu Titanium fournit le Grade 9 en tube et en barre selon les normes ASTM et AMS, avec un certificat mati\u00e8re de r\u00e9ception 3.1 selon EN 10204 et une tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e sur la commande.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Champ<\/th>\nValeur indiqu\u00e9e par le guide<\/th>\n<\/tr>\n<\/thead>\n
Alliage<\/td>\nTi-3Al-2.5V<\/td>\n<\/tr>\n
UNS<\/td>\nR56320<\/td>\n<\/tr>\n
Aluminium<\/td>\n2.5 \u00e0 3.5 pour cent, selon ASTM B265 Tableau 1<\/td>\n<\/tr>\n
Vanadium<\/td>\n2.0 \u00e0 3.0 pour cent, selon ASTM B265 Tableau 1<\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction minimale, recuit<\/td>\n620 MPa (90 ksi), selon ASTM B265 Tableau 2<\/td>\n<\/tr>\n
Limite d'\u00e9lasticit\u00e9 minimale, recuit<\/td>\n483 MPa, selon ASTM B265 Tableau 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

\u00c0 l'\u00e9tat recuit, le Grade 9 pr\u00e9sente une r\u00e9sistance \u00e0 la traction minimale ASTM proche de 620 MPa (90 ksi) et une limite d'\u00e9lasticit\u00e9 proche de 500 MPa (70 ksi), avec un allongement d'environ 15 %. C'est environ le double de la r\u00e9sistance du Grade 2 pour une m\u00eame faible densit\u00e9, ce qui est le compromis qui le rend utile. Les valeurs r\u00e9elles sont confirm\u00e9es par 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 9 (Ti-3Al-2.5V, R56320)<\/th>\n<\/tr>\n<\/thead>\n
R\u00e9sistance \u00e0 la traction (min, recuit)<\/td>\n620 MPa \/ 90 ksi<\/td>\n<\/tr>\n
Limite d'\u00e9lasticit\u00e9 (min, recuit)<\/td>\n500 MPa \/ 70 ksi<\/td>\n<\/tr>\n
Allongement (min)<\/td>\n15 %<\/td>\n<\/tr>\n
\u00c9tat<\/td>\nrecuit ; \u00e9croui et d\u00e9tensionn\u00e9 pour un tube \u00e0 r\u00e9sistance sup\u00e9rieure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

Le Grade 9 conserve l'essentiel de la r\u00e9sistance \u00e0 la corrosion du titane CP car c'est encore un alliage riche en titane qui forme le m\u00eame film d'oxyde protecteur. Il supporte bien l'eau de mer, les acides oxydants et les chlorures. Pour les acides r\u00e9ducteurs ou le service en zones confin\u00e9es serr\u00e9es, le Grade 7 ou le Grade 12 restent les meilleurs choix en corrosion ; le Grade 9 est sp\u00e9cifi\u00e9 pour son rapport r\u00e9sistance\/poids, pas comme am\u00e9lioration anticorrosion.<\/p>\n

Grade 9 ou Grade 2<\/h2>\n

Le Grade 2 est du titane commercialement pur avec une r\u00e9sistance \u00e0 la traction minimale de 345 MPa, choisi pour le service anticorrosion et la facilit\u00e9 de formage. Le Grade 9 double environ cette r\u00e9sistance tout en restant soudable et formable. Sp\u00e9cifier le Grade 9 plut\u00f4t que le Grade 2 lorsqu'un tube ou une pi\u00e8ce doit supporter une pression ou une charge que le titane CP ne peut pas supporter, et le Grade 2 lorsque l'objectif est la r\u00e9sistance \u00e0 la corrosion plut\u00f4t que la r\u00e9sistance m\u00e9canique.<\/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 un titane commercialement pur avec une r\u00e9sistance \u00e0 la traction minimale de 345 MPa, retenu pour les applications corrosives et le formage ais\u00e9. Grade 9 double approximativement cette r\u00e9sistance tout en restant soudable et formable<\/td>\n<\/tr>\n
Grade 5<\/td>\nGrade 5 (Ti-6Al-4V) atteint environ 895 MPa, mais est plus difficile \u00e0 former et \u00e0 souder. Grade 9 \u00e9change la r\u00e9sistance maximale contre la capacit\u00e9 d'\u00eatre \u00e9tir\u00e9 \u00e0 froid en tube \u00e0 paroi mince et pli\u00e9 sans fissuration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Grade 9 ou Grade 5<\/h2>\n

Le Grade 5 (Ti-6Al-4V) atteint environ 895 MPa mais est plus difficile \u00e0 former et \u00e0 souder. Le Grade 9 \u00e9change une r\u00e9sistance maximale contre la capacit\u00e9 \u00e0 \u00eatre \u00e9tir\u00e9 \u00e0 froid en tube \u00e0 paroi mince et pli\u00e9 sans fissurer. Pour les pi\u00e8ces structurelles usin\u00e9es n\u00e9cessitant une r\u00e9sistance maximale, le Grade 5 l'emporte ; pour le tube \u00e0 haute r\u00e9sistance et le travail de formage, le Grade 9 est la nuance pratique.<\/p>\n

Applications typiques<\/h2>\n

Le Grade 9 est la r\u00e9f\u00e9rence du tube en titane \u00e0 haute r\u00e9sistance : circuits hydrauliques a\u00e9rospatiaux, tube haute pression, et applications sportives comme les cadres de v\u00e9lo. Il appara\u00eet aussi en barre lorsqu'une pi\u00e8ce n\u00e9cessite plus de r\u00e9sistance que le titane CP mais doit \u00eatre form\u00e9e ou soud\u00e9e. La plupart des acheteurs acc\u00e8dent au Grade 9 via le tube plut\u00f4t que la plaque.<\/p>\n\n\n\n\n\n\n\n
Domaine d'application<\/th>\nCe que le guide indique<\/th>\n<\/tr>\n<\/thead>\n
Tubes en titane \u00e0 haute r\u00e9sistance<\/td>\nConduites hydrauliques a\u00e9rospatiales et tubes haute pression; Grade 9 est d\u00e9crit comme la nuance de r\u00e9f\u00e9rence dans ce domaine<\/td>\n<\/tr>\n
Applications sportives<\/td>\nComme les cadres de bicyclettes<\/td>\n<\/tr>\n
Barre<\/td>\nLorsqu'une pi\u00e8ce n\u00e9cessite une r\u00e9sistance sup\u00e9rieure \u00e0 celle du titane commercialement pur mais doit \u00eatre form\u00e9e ou soud\u00e9e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Formes et normes<\/h2>\n

Beiyu fournit le Grade 9 principalement en tube sans soudure et soud\u00e9 selon ASTM B338<\/a>, et en barre selon ASTM B348. Le tube a\u00e9rospatial est souvent appel\u00e9 selon AMS 4943, 4944 ou 4945. Associer la nuance \u00e0 la forme dans la demande : diam\u00e8tre ext\u00e9rieur, \u00e9paisseur de paroi, longueur, fili\u00e8re (sans soudure ou soud\u00e9) et \u00e9tat. Voir la gamme de tubes en titane<\/a> pour les formes en stock.<\/p>\n\n\n\n\n\n\n\n
Forme<\/th>\nNorme cit\u00e9e par le guide<\/th>\n<\/tr>\n<\/thead>\n
Tube sans soudure et soud\u00e9<\/td>\nASTM B338<\/td>\n<\/tr>\n
Barre<\/td>\nASTM B348<\/td>\n<\/tr>\n
Tube a\u00e9rospatial<\/td>\nSouvent sp\u00e9cifi\u00e9 selon AMS 4943, 4944 ou 4945<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

Le Grade 9 co\u00fbte plus cher que le Grade 2 en raison de l'ajout d'alliage et de la transformation du tube, et moins cher que la barre Ti-6Al-4V de sp\u00e9cification a\u00e9rospatiale utilis\u00e9e pour les pi\u00e8ces forg\u00e9es. Pour obtenir une offre pr\u00e9cise, indiquer la nuance, la norme, le diam\u00e8tre ext\u00e9rieur et l'\u00e9paisseur de paroi, la longueur, l'\u00e9tat, et l'\u00e9tendue des certificats. Le mat\u00e9riau est fourni avec un certificat mati\u00e8re de r\u00e9ception 3.1 selon EN 10204 et une tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e selon l'\u00e9tendue de la commande.<\/p>\n

Questions courantes<\/h2>\n

Le Grade 9 est-il identique au Ti-3Al-2.5V ?<\/strong> Oui. Grade 9, Ti-3Al-2.5V et UNS R56320 d\u00e9signent le m\u00eame alliage.<\/p>\n

Le Grade 9 est-il plus r\u00e9sistant que le Grade 2 ?<\/strong> Oui, environ le double de la r\u00e9sistance \u00e0 la traction \u00e0 l'\u00e9tat recuit, tout en restant formable et soudable.<\/p>\n

Le Grade 9 peut-il \u00eatre soud\u00e9 ?<\/strong> Oui, avec la protection de gaz inerte que le titane exige toujours. Cette soudabilit\u00e9 est l'une des raisons de son utilisation en tube.<\/p>\n

Quelle norme couvre le tube Grade 9 ?<\/strong> L'ASTM B338 couvre le tube en titane, y compris le Grade 9 ; le tube a\u00e9rospatial est souvent sp\u00e9cifi\u00e9 selon AMS 4943, 4944 ou 4945.<\/p>\n

Beiyu Titanium est la marque internationale d'exportation de titane de Jiaxing Beiyu New Materials Technology Co., Ltd., fournisseur et exportateur de titane & avec une production directe \u00e0 Baoji, Shaanxi. Pour une offre de tube ou de barre en titane Grade 9 avec un certificat de r\u00e9ception 3.1 selon EN 10204, envoyez les dimensions et la norme \u00e0 penn@beiyutitanium.com. Pour comparer d'abord les nuances, consultez le guide de comparaison des nuances de titane<\/a>.<\/p>\n

<\/p>\n

Positionnement de Grade 9 et informations que la commande doit toujours indiquer<\/h2>\n

Grade 9 est choisi lorsque le titane commercialement pur n'est pas suffisamment r\u00e9sistant et que l'alliage complet d\u00e9passe les besoins de la pi\u00e8ce. Cette d\u00e9cision d\u00e9termine le mat\u00e9riau. Elle ne d\u00e9termine pas les rubriques qui d\u00e9cident de l'acceptation du produit livr\u00e9.<\/p>\n\n\n\n\n\n\n\n
D\u00e9termin\u00e9 par la nuance<\/th>\nToujours d\u00e9termin\u00e9 par la commande<\/th>\n<\/tr>\n<\/thead>\n
Plage de composition et propri\u00e9t\u00e9s m\u00e9caniques minimales<\/td>\nForme de produit et dimension applicable avec tol\u00e9rance<\/td>\n<\/tr>\n
Comportement dans le service pr\u00e9vu<\/td>\n\u00c9tat de livraison, indiqu\u00e9 s\u00e9par\u00e9ment de l'\u00e9tat de surface<\/td>\n<\/tr>\n
Cha\u00eene de sp\u00e9cifications \u00e0 laquelle appartient le num\u00e9ro UNS<\/td>\n\u00c9tendue du contr\u00f4le et sa classe d'acceptation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Comment les valeurs qui placent une coul\u00e9e dans la plage sont obtenues<\/h2>\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>\nCe que sa d\u00e9signation \u00e9tablit<\/th>\n<\/tr>\n<\/thead>\n
Composition de l'alliage<\/td>\nASTM E539 et ASTM E2371<\/td>\nLes voies spectrom\u00e9triques d\u00e9sign\u00e9es dans les documents r\u00e9f\u00e9renc\u00e9s<\/td>\n<\/tr>\n
Oxyg\u00e8ne et azote<\/td>\nASTM E1409<\/td>\nLes interstitiels qui modifient les propri\u00e9t\u00e9s au sein de la plage<\/td>\n<\/tr>\n
Hydrog\u00e8ne<\/td>\nASTM E1447<\/td>\nD\u00e9termin\u00e9 par une m\u00e9thode d\u00e9sign\u00e9e<\/td>\n<\/tr>\n
Propri\u00e9t\u00e9s de traction<\/td>\nASTM E8<\/td>\nComment les valeurs de r\u00e9sistance ont \u00e9t\u00e9 obtenues<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

La d\u00e9signation d'une m\u00e9thode \u00e9tablit comment une valeur a \u00e9t\u00e9 produite. Elle n'ajoute pas un contr\u00f4le que la commande n'a pas demand\u00e9, et elle ne rend pas interchangeables une analyse de coul\u00e9e et une analyse ult\u00e9rieure du produit.<\/p>\n

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

Grade 9 (Ti-3Al-2.5V, UNS R56320) contient 2.5 \u00e0 3.5% d'aluminium et 2.0 \u00e0 3.0% de vanadium, selon ASTM B265<\/a>, Tableau 1. \u00c0 l'\u00e9tat recuit, les minimums sont de 620 MPa (90 ksi) en traction et de 483 MPa de limite d'\u00e9lasticit\u00e9, selon ASTM B265, Tableau 2, soit environ 80% au-dessus du seuil de 345 MPa de Grade 2.<\/p>\n

The alloy’s main product form is tube: ASTM B338<\/a>, la sp\u00e9cification pour les tubes en titane sans soudure et soud\u00e9s destin\u00e9s aux condenseurs et \u00e9changeurs de chaleur, liste Grade 9 aux c\u00f4t\u00e9s des nuances non alli\u00e9es. Son allongement minimum de 15% \u00e0 l'\u00e9tat recuit (ASTM B265, Tableau 2) laisse une aptitude suffisante au travail \u00e0 froid pour la r\u00e9duction et le cintrage des tubes.<\/p>\n

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

Grade 9 titanium is Ti-3Al-2.5V, UNS R56320, Werkstoff 3.7195. Minimum tensile strength is about 620 MPa, against 345 MPa for Grade 2 and 895 MPa for Grade 5. It stays cold formable and weldable at that strength, which is why it is the grade most often drawn into tube. Grade 9 titanium sits between commercially 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