{"id":6274,"date":"2026-09-19T12:36:40","date_gmt":"2026-09-19T12:36:40","guid":{"rendered":"https:\/\/beiyutitanium.com\/titanium-hardness-by-grade\/"},"modified":"2026-09-19T12:36:40","modified_gmt":"2026-09-19T12:36:40","slug":"titanium-hardness-by-grade","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/fr\/titanium-hardness-by-grade\/","title":{"rendered":"Duret\u00e9 du titane par grade : valeurs Rockwell, Brinell et Vickers"},"content":{"rendered":"

La duret\u00e9 du titane d\u00e9pend du grade. Les grades non alli\u00e9s se situent sur l'\u00e9chelle Rockwell B, de 70 HRB pour Grade 1 \u00e0 100 HRB pour Grade 4, tandis que les alliages Grade 9, Grade 5 et Grade 23 passent sur l'\u00e9chelle Rockwell C, Grade 5 \u00e9tant \u00e0 33 HRC nominal selon RMI Titanium Company Titanium Alloy Guide<\/em>. Ce sont des valeurs typiques, non des limites : ni ASTM B265 ni ASTM B348 ne fixe d'exigence de duret\u00e9, une valeur de duret\u00e9 ne devient donc une valeur v\u00e9rifi\u00e9e que lorsque la commande la demande.<\/p>\n

\"Digital
Microm\u00e8tre num\u00e9rique mesurant le diam\u00e8tre d'une barre de titane sur un marbre de contr\u00f4le<\/figcaption><\/figure>\n

Duret\u00e9 du titane par grade<\/h2>\n

Les valeurs nominales ci-dessous proviennent des fiches techniques par grade d'une seule publication, le RMI Titanium Alloy Guide<\/em> (janvier 2000), de sorte que chaque ligne repose sur la m\u00eame base. Lorsqu'une fiche technique Beiyu Titanium donne sa propre valeur typique pour le m\u00eame grade, celle-ci figure dans la derni\u00e8re colonne au lieu d'\u00eatre fusionn\u00e9e, car il s'agit de valeurs typiques provenant de deux publications, et pour Grade 2 sur des \u00e9chelles diff\u00e9rentes.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Nuance<\/th>\nUNS<\/th>\nDuret\u00e9 nominale RMI<\/th>\nValeur typique de la fiche technique Beiyu<\/th>\n<\/tr>\n
Grade 1<\/td>\nR50250<\/td>\n70 HRB<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 2<\/td>\nR50400<\/td>\n82 HRB<\/td>\nEnviron 150 HB, ou 160 \u00e0 200 HV<\/td>\n<\/tr>\n
Grade 3<\/td>\nR50550<\/td>\n90 HRB<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 4<\/td>\nR50700<\/td>\n100 HRB<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 7<\/td>\nR52400<\/td>\n82 HRB<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 12<\/td>\nR53400<\/td>\n88 HRB<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 9<\/td>\nR56320<\/td>\n25 HRC<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 23<\/td>\nR56407<\/td>\n32 HRC<\/td>\nNon publi\u00e9<\/td>\n<\/tr>\n
Grade 5<\/td>\nR56400<\/td>\n33 HRC<\/td>\n30 \u00e0 36 HRC \u00e0 l'\u00e9tat recuit, environ 330 HV ou 334 HB ; environ 35 \u00e0 39 HRC apr\u00e8s mise en solution et vieillissement<\/td>\n<\/tr>\n<\/table>\n

Les num\u00e9ros UNS sont donn\u00e9s \u00e0 titre de correspondance ; l'ASTM B348 elle-m\u00eame n'identifie le mat\u00e9riau que par son num\u00e9ro de grade. Le Grade 23 y figure sous R56407, et R56401 est le num\u00e9ro que l'ASTM F136 attribue \u00e0 la forme implantable du m\u00eame alliage. La ligne du Grade 5 est celle o\u00f9 les deux sources peuvent \u00eatre lues l'une contre l'autre sur une m\u00eame \u00e9chelle : les 33 HRC nominaux de RMI tombent \u00e0 l'int\u00e9rieur de la plage recuite de 30 \u00e0 36 HRC de la fiche technique Grade 5<\/a>.<\/p>\n

Duret\u00e9 et limite d'oxyg\u00e8ne pour les grades non alli\u00e9s<\/h2>\n

Les quatre grades non alli\u00e9s ne sont pas quatre puret\u00e9s d'un m\u00eame m\u00e9tal au sens large. Ils se distinguent par leurs limites en oxyg\u00e8ne, azote et fer, et les valeurs de duret\u00e9 RMI croissent dans le m\u00eame ordre que la limite d'oxyg\u00e8ne.<\/p>\n\n\n\n\n\n\n
Nuance<\/th>\nOxyg\u00e8ne, max (% en masse)<\/th>\nAzote, max (% en masse)<\/th>\nFer, max (% en masse)<\/th>\nDuret\u00e9 nominale RMI<\/th>\n<\/tr>\n
Grade 1<\/td>\n0.18<\/td>\n0.03<\/td>\n0.20<\/td>\n70 HRB<\/td>\n<\/tr>\n
Grade 2<\/td>\n0.25<\/td>\n0.03<\/td>\n0.30<\/td>\n82 HRB<\/td>\n<\/tr>\n
Grade 3<\/td>\n0.35<\/td>\n0.05<\/td>\n0.30<\/td>\n90 HRB<\/td>\n<\/tr>\n
Grade 4<\/td>\n0.40<\/td>\n0.05<\/td>\n0.50<\/td>\n100 HRB<\/td>\n<\/tr>\n<\/table>\n

Pour l'acheteur, la lecture pratique est que choisir entre Grade 1 et Grade 4 revient aussi \u00e0 choisir entre le plus tendre et le plus dur de la famille non alli\u00e9e.<\/p>\n

Lire HRB, HRC, HB et HV c\u00f4te \u00e0 c\u00f4te<\/h2>\n

Une valeur sur l'\u00e9chelle Rockwell B et une valeur sur l'\u00e9chelle Rockwell C, Brinell ou Vickers ne sont pas le m\u00eame nombre exprim\u00e9 dans des unit\u00e9s diff\u00e9rentes. Dans le guide RMI, les grades non alli\u00e9s ainsi que Grade 7 et Grade 12 sont donn\u00e9s sur Rockwell B, et les alliages Grade 9, Grade 5 et Grade 23 sur Rockwell C : c'est l\u00e0 que le tableau ci-dessus change d'\u00e9chelle. La conversion entre \u00e9chelles exige une base de conversion convenue pour le mat\u00e9riau ; une limite port\u00e9e sur un plan doit donc nommer l'\u00e9chelle sur laquelle elle est \u00e9crite, et l'essai doit \u00eatre conduit sur cette \u00e9chelle.<\/p>\n\n\n\n\n\n\n
\u00c9chelle<\/th>\nO\u00f9 elle appara\u00eet dans les sources par grade utilis\u00e9es ici<\/th>\n<\/tr>\n
HRB (Rockwell B)<\/td>\nGrades non alli\u00e9s ainsi que Grade 7 et Grade 12 dans le guide RMI<\/td>\n<\/tr>\n
HRC (Rockwell C)<\/td>\nGrade 5, Grade 9 et Grade 23 dans le guide RMI ; Grade 5 sur la fiche technique Beiyu<\/td>\n<\/tr>\n
HB (Brinell)<\/td>\nFiches techniques Beiyu pour Grade 2 et Grade 5<\/td>\n<\/tr>\n
HV (Vickers)<\/td>\nFiches techniques Beiyu pour Grade 2 et Grade 5<\/td>\n<\/tr>\n<\/table>\n

La duret\u00e9 Mohs, l'\u00e9chelle de rayure utilis\u00e9e pour les min\u00e9raux, n'appara\u00eet pour aucun grade dans l'une ou l'autre source.<\/p>\n

L'\u00e9tat de livraison modifie-t-il la duret\u00e9 du titane ?<\/h2>\n

Oui, pour les alliages traitables thermiquement. La fiche technique du Grade 5 donne 30 \u00e0 36 HRC \u00e0 l'\u00e9tat recuit et environ 35 \u00e0 39 HRC apr\u00e8s mise en solution et vieillissement : le m\u00eame alliage peut donc arriver dans deux plages de duret\u00e9 diff\u00e9rentes selon l'\u00e9tat inscrit sur la commande. La valeur RMI du Grade 5 est une valeur nominale sans plage d'\u00e9tat. Pour les grades non alli\u00e9s, l'\u00e9tat recuit est l'\u00e9tat de livraison normal et les valeurs du tableau sont celles \u00e0 attendre.<\/p>\n

\"Batch
Lot de barres rondes en titane rectifi\u00e9es de pr\u00e9cision, dispos\u00e9es pour l'inspection<\/figcaption><\/figure>\n

Inscrire une limite de duret\u00e9 sur une commande de titane<\/h2>\n

Comme ASTM B265 et B348 ne comportent pas de colonne de duret\u00e9, un certificat \u00e9tabli selon ces seules normes n'est pas tenu d'indiquer la duret\u00e9, et le mat\u00e9riau ne peut pas \u00eatre refus\u00e9 sur la duret\u00e9 au titre de ces normes. Le volet documentaire est pr\u00e9sent\u00e9 dans la comparaison titane vs acier inoxydable<\/a>. Lorsque la pi\u00e8ce exige effectivement une limite de duret\u00e9, la commande doit la porter comme exigence suppl\u00e9mentaire.<\/p>\n\n\n\n\n\n\n
Ligne sur la commande<\/th>\n\u00c0 indiquer<\/th>\n<\/tr>\n
Nuance et \u00e9tat<\/td>\nPar exemple Grade 5 recuit, ou Grade 5 mis en solution et vieilli<\/td>\n<\/tr>\n
\u00c9chelle<\/td>\nL'\u00e9chelle utilis\u00e9e par le plan (HRB, HRC, HB ou HV), indiqu\u00e9e explicitement<\/td>\n<\/tr>\n
Limite<\/td>\nMinimum, maximum ou plage sur cette \u00e9chelle<\/td>\n<\/tr>\n
M\u00e9thode d'essai et consignation<\/td>\nLa m\u00e9thode d'essai, et le fait que le r\u00e9sultat soit consign\u00e9 sur le certificat<\/td>\n<\/tr>\n<\/table>\n

Pour la barre, la liste de contr\u00f4le de demande de prix pour barre en titane<\/a> indique les autres lignes n\u00e9cessaires \u00e0 la demande, et le mat\u00e9riau est fourni sous forme de Barre en titane Grade 2<\/a> ou plaque Ti-6Al-4V<\/a> parmi d'autres formes de produit.<\/p>\n

Questions courantes<\/h2>\n

Quel est le grade de titane le plus dur ?<\/strong> Dans les valeurs RMI pour les grades ci-dessus, Grade 5 est \u00e0 33 HRC nominal et Grade 23 \u00e0 32 HRC ; parmi les grades non alli\u00e9s, Grade 4 est \u00e0 100 HRB.<\/p>\n

Le titane est-il plus dur que l'acier ?<\/strong> Cela d\u00e9pend de l'acier ; la comparaison, y compris la raison pour laquelle l'usure est une question de surface et non une valeur de duret\u00e9 du m\u00e9tal de base, se trouve dans la comparaison titane vs acier inoxydable<\/a>.<\/p>\n

Quelle est la duret\u00e9 du titane Grade 2 ?<\/strong> Une valeur nominale de 82 HRB dans le guide RMI ; la fiche technique Grade 2<\/a> donne des valeurs typiques d'environ 150 HB, ou 160 \u00e0 200 HV.<\/p>\n

Le titane est-il magn\u00e9tique ?<\/strong> La r\u00e9ponse, avec les valeurs de perm\u00e9abilit\u00e9 par grade, se trouve sur le titane est-il magn\u00e9tique<\/a>.<\/p>\n

Le titane est-il lourd ?<\/strong> La densit\u00e9 par grade et le poids au m\u00e8tre par dimension de barre se trouvent sur le titane est-il lourd<\/a>.<\/p>\n

La duret\u00e9 figure-t-elle sur un certificat mati\u00e8re de titane ?<\/strong> ASTM B265 et B348 ne l'exigent pas, elle n'appara\u00eet donc que lorsque la commande l'ajoute, comme dans la section commande ci-dessus.<\/p>\n

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

Les valeurs nominales de duret\u00e9 proviennent de RMI Titanium Company Titanium Alloy Guide<\/em> (janvier 2000), qui donne un chiffre nominal par grade sur ses fiches techniques : 70 HRB pour le Grade 1, 82 HRB pour le Grade 2, 90 HRB pour le Grade 3, 100 HRB pour le Grade 4, 82 HRB pour le Grade 7, 88 HRB pour le Grade 12, 25 HRC pour le Grade 9, 32 HRC pour le Grade 23 et 33 HRC pour le Grade 5. Les maximums d'oxyg\u00e8ne, d'azote et de fer du tableau des grades non alli\u00e9s proviennent des lignes de composition chimique du m\u00eame guide pour ces grades. Les chiffres Beiyu sont les valeurs typiques port\u00e9es sur les fiches techniques Beiyu Titanium des Grades 2 et 5 ; ils sont pr\u00e9sent\u00e9s \u00e0 c\u00f4t\u00e9 de ceux de RMI plut\u00f4t que r\u00e9concili\u00e9s, parce qu'il s'agit de valeurs typiques issues de deux publications et, pour le Grade 2, sur des \u00e9chelles diff\u00e9rentes. Aucune de ces valeurs n'est une limite de sp\u00e9cification : l'ASTM B265 et l'ASTM B348 fixent des exigences chimiques, m\u00e9caniques et dimensionnelles et ne contiennent aucune exigence de duret\u00e9, de sorte que la duret\u00e9 n'est v\u00e9rifi\u00e9e que lorsque la commande l'ajoute.<\/p>\n

\u00c9l\u00e9ments \u00e0 indiquer dans la demande de prix<\/h2>\n

Indiquez le grade, l'\u00e9tat de livraison et, si le plan en comporte une, la limite de duret\u00e9 avec son \u00e9chelle ; avec ces \u00e9l\u00e9ments, un essai de duret\u00e9 est chiffr\u00e9 avec le mat\u00e9riau au lieu d'\u00eatre soulev\u00e9 au contr\u00f4le. Beiyu Titanium fournit du titane en Grade 1, 2, 5, 7, 9, 12 et 23 sous forme de barre, plaque, t\u00f4le, tube et pi\u00e8ces forg\u00e9es selon les sp\u00e9cifications ASTM et AMS, avec un certificat mati\u00e8re EN 10204 3.1 selon l'\u00e9tendue de la commande.<\/p>","protected":false},"excerpt":{"rendered":"

Titanium hardness depends on the grade. The unalloyed grades sit on the Rockwell B scale, from 70 HRB for Grade 1 to 100 HRB for Grade 4, while the alloys Grade 9, Grade 5 and Grade 23 move to the Rockwell C scale, with Grade 5 at a nominal 33 HRC in the RMI Titanium […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","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 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Production runs through the Beiyu titanium mill in Baoji, Shaanxi. 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Over 15 years in titanium export he has learned to review each specification line himself, checking grade, standard, dimensions, tolerance and certificate scope against mill capability before quoting, rather than routing enquiries through a sales desk. He came to titanium supply from the other side of the transaction. Before leading Beiyu's international business he worked at Koch (Koch-Glitsch) and was directly involved in delivering a SABIC petrochemical project in Fujian, China. That work was built on inspection and test plans, material certification and heat traceability, third party inspection coordination, and project documentation and dossier control. Those are the same four things a process industry or regulated buyer will hold a titanium supplier to, and having had to enforce them as a customer is why they are treated here as part of the supply rather than as paperwork produced afterwards. His day-to-day work spans the questions this site is written to answer: choosing between commercially pure and alloyed titanium grades for a corrosive service, reading a mill test certificate against the ordered standard, and matching a buyer's designation (ASTM grade, UNS, German Werkstoff number or French NF code) to the same metal across markets. Beiyu supplies titanium, nickel-alloy and refractory mill products across bar, rod, plate, tube, block, ring, coil, ingot, forgings and machined parts, with EN 10204 3.1 documentation and heat-number traceability.\",\"url\":\"https:\\\/\\\/beiyutitanium.com\\\/fr\\\/author\\\/penn-ma\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Duret\u00e9 du titane par Grade | HRB, HRC, HB et HV | Beiyu","description":"Duret\u00e9 du titane par Grade : 70 HRB pour le Grade 1 jusqu'\u00e0 33 HRC pour le Grade 5, avec les sources, la signification de chaque \u00e9chelle et pourquoi ASTM B265 et B348 ne fixent aucune limite de duret\u00e9.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/beiyutitanium.com\/fr\/titanium-hardness-by-grade\/","og_locale":"fr_FR","og_type":"article","og_title":"Titanium Hardness by Grade | HRB, HRC, HB 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m\u00e9dical et industriel dans le monde entier. La production est assur\u00e9e par l'usine de titane Beiyu \u00e0 Baoji, Shaanxi. Les commandes sont trait\u00e9es sur demande de prix, avec des certificats de r\u00e9ception 3.1 selon EN 10204 et une tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e disponibles sur demande.","areaServed":"Worldwide","knowsAbout":["Titanium","Titanium alloy","Titanium bar","Titanium sheet and plate","Titanium tube and pipe","Titanium forgings","Titanium wire","Titanium anode"],"address":{"@type":"PostalAddress","streetAddress":"Baotai Road Industrial Park, High-tech Development Zone","addressLocality":"Baoji","addressRegion":"Shaanxi","addressCountry":"CN"},"legalName":"Jiaxing Beiyu New Materials Technology Co., Ltd."},{"@type":"Person","@id":"https:\/\/beiyutitanium.com\/#\/schema\/person\/3560db17cf08813edf34f012735b971b","name":"Penn Ma","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/0659bdefb633d0d8e567b06d2f8bffac2a369834e53e96c922a06fd8a96f3c72?s=96&d=mm&r=g","caption":"Penn Ma"},"description":"Penn Ma est la personne qui r\u00e9pond aux demandes de prix chez Beiyu Titanium. Avec plus de 15 ans d'exp\u00e9rience dans l'exportation de titane, il a appris \u00e0 examiner lui-m\u00eame chaque ligne de sp\u00e9cification, en v\u00e9rifiant la nuance, la norme, les dimensions, la tol\u00e9rance et le p\u00e9rim\u00e8tre du certificat par rapport aux capacit\u00e9s de l'usine avant d'\u00e9tablir une offre, plut\u00f4t que d'orienter les demandes vers un service commercial. Il est venu \u00e0 l'approvisionnement en titane depuis l'autre c\u00f4t\u00e9 de la transaction. Avant de diriger les activit\u00e9s internationales de Beiyu, il a travaill\u00e9 chez Koch (Koch-Glitsch) et a particip\u00e9 directement \u00e0 la r\u00e9alisation d'un projet p\u00e9trochimique SABIC dans le Fujian, en Chine. 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. Beiyu fournit des produits d'usine en titane, alliages de nickel et m\u00e9taux r\u00e9fractaires, notamment des barres, tiges, plaques, tubes, blocs, anneaux, bobines, lingots, pi\u00e8ces forg\u00e9es et pi\u00e8ces usin\u00e9es, avec documentation EN 10204 3.1 et tra\u00e7abilit\u00e9 par num\u00e9ro de coul\u00e9e.","url":"https:\/\/beiyutitanium.com\/fr\/author\/penn-ma\/"}]}},"_links":{"self":[{"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/posts\/6274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/comments?post=6274"}],"version-history":[{"count":0,"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/posts\/6274\/revisions"}],"wp:attachment":[{"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/media?parent=6274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/categories?post=6274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beiyutitanium.com\/fr\/wp-json\/wp\/v2\/tags?post=6274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}