{"id":4608,"date":"2026-07-12T12:43:46","date_gmt":"2026-07-12T12:43:46","guid":{"rendered":"https:\/\/beiyutitanium.com\/titanium-for-medical-implants\/"},"modified":"2026-07-30T01:13:27","modified_gmt":"2026-07-30T01:13:27","slug":"titanium-for-medical-implants","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/de\/titanium-for-medical-implants\/","title":{"rendered":"Titanium for Medical Implants: Grades, Standards, and How to Specify"},"content":{"rendered":"

<\/p>\n

Titanium reaches medical implants as two material families: commercially pure (CP) titanium in Grades 1 to 4, and the Ti-6Al-4V alloy in standard and extra-low-interstitial (ELI) forms. Which one a device uses comes down to load. CP titanium to ASTM F67 handles corrosion-driven and lower-load parts; Ti-6Al-4V ELI to ASTM F136 (Grade 23) carries load-bearing orthopedic, spinal and trauma implants. The grade, the governing standard, and the acceptance criteria all belong on the order.<\/p>\n

Beiyu Titanium supplies implant-grade titanium as mill products, CP bar and wire to ASTM F67 and Ti-6Al-4V ELI to ASTM F136, including precision centerless-ground routes, for machining into finished devices by the manufacturer. When EN 10204 3.1 documentation and heat or lot traceability are required, state the requested reporting scope in the RFQ. This guide is the hub for our medical titanium content<\/a>: it maps the grades and standards, then links to the deep guides for each. It uses implant-standard language rather than the loose phrase “medical grade titanium,” which body-jewelry marketing has made ambiguous; for an implant, the ASTM or ISO standard is what to specify.<\/p>\n

Why is titanium used for medical implants?<\/h2>\n

Titanium is used for medical implants because it combines corrosion resistance, established biocompatibility, a high strength-to-weight ratio and a lower elastic modulus than cobalt-chromium alloys or stainless steels. Its stable oxide film supports corrosion resistance in physiological environments. Appropriately prepared titanium surfaces can support osseointegration, allowing bone to grow against or into an implant surface. The lower modulus can also reduce, though not eliminate, stress shielding. CP titanium and Ti-6Al-4V are both used for implant manufacture; the drawing, load case and governing material standard determine the selection.<\/p>\n

Which titanium grades are used for medical implants?<\/h2>\n

These six ASTM grades cover common implant-material selections, split between unalloyed CP titanium and the Ti-6Al-4V alloy. The table aggregates the ASTM grade families; each is covered in depth in the linked guides below.<\/p>\n\n\n\n\n\n\n\n\n\n\n
G\u00fcte<\/th>\nUNS<\/th>\nTyp<\/th>\nStrength vs formability<\/th>\nCommon implant role<\/th>\nImplantatnorm<\/th>\n<\/tr>\n<\/thead>\n
CP Grade 1<\/td>\nR50250<\/td>\nUnalloyed CP<\/td>\nLowest strength, most formable<\/td>\nFormed, low-load CP parts<\/td>\nASTM F67<\/td>\n<\/tr>\n
CP Grade 2<\/td>\nR50400<\/td>\nUnalloyed CP<\/td>\nBalanced strength and formability<\/td>\nNon-load-bearing CP components<\/td>\nASTM F67<\/td>\n<\/tr>\n
CP Grade 3<\/td>\nR50550<\/td>\nUnalloyed CP<\/td>\nHigher CP strength<\/td>\nHigher-load CP parts<\/td>\nASTM F67<\/td>\n<\/tr>\n
CP Grade 4<\/td>\nR50700<\/td>\nUnalloyed CP<\/td>\nHighest CP strength<\/td>\nDental posts, higher-load CP<\/td>\nASTM F67<\/td>\n<\/tr>\n
Grade 5 Ti-6Al-4V<\/td>\nR56400<\/td>\nAlpha-beta alloy, standard interstitial<\/td>\nHigh strength<\/td>\nImplants specified standard interstitial<\/td>\nASTM F1472<\/td>\n<\/tr>\n
Grade 23 Ti-6Al-4V ELI<\/td>\nR56401<\/td>\nAlpha-beta alloy, extra-low interstitial<\/td>\nHigh strength plus fracture toughness<\/td>\nLoad-bearing orthopedic, spinal, trauma<\/td>\nASTM F136<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

UNS and standard scope are; implant role reflects common practice. Confirm the exact grade and standard on the drawing.<\/em><\/p>\n

Corrosion resistance is essentially common to all six, so the decision is a strength-and-toughness one. CP grades separate only by controlled oxygen and iron; the alloy grades separate by interstitial ceiling. For the broader alloy-versus-CP picture beyond implants, see our Vergleichsleitfaden f\u00fcr Titang\u00fcten<\/a>.<\/p>\n

Which ASTM and ISO standards apply to implant titanium?<\/h2>\n

This map is what most grade-list pages leave out, and it is the part a buyer actually needs to write a clean purchase order. Implant titanium carries a surgical-implant material standard (the F-series or ISO 5832 series) and, for bar and wire, a general product standard alongside it.<\/p>\n

When the drawing moves from the general implant map to standard-interstitial Ti-6Al-4V or implant forgings, use Beiyu’s ASTM F1472 and F620 guide<\/a> for the certificate-chain detail around R56400, R56401 and B381 F-23 \/ R56407.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Norm<\/th>\nMaterial scope<\/th>\nUNS<\/th>\nForms<\/th>\nRole on the order<\/th>\n<\/tr>\n<\/thead>\n
ASTM F67<\/td>\nUnalloyed titanium for surgical implant applications, Grades 1-4<\/td>\nR50250 \/ R50400 \/ R50550 \/ R50700<\/td>\nStrip, sheet, plate, bar, billet, forging, wire<\/td>\nASTM CP implant specification<\/td>\n<\/tr>\n
ASTM F136<\/td>\nWrought annealed Ti-6Al-4V ELI for surgical implant applications<\/td>\nR56401<\/td>\nStrip, sheet, plate, bar, forging bar, wire<\/td>\nASTM ELI implant specification<\/td>\n<\/tr>\n
ASTM F1472<\/td>\nWrought annealed Ti-6Al-4V for surgical implant applications<\/td>\nR56400<\/td>\nStrip, sheet, plate, bar, forging bar, wire<\/td>\nASTM standard-interstitial implant specification<\/td>\n<\/tr>\n
ASTM B348\/B348M<\/td>\nTitanium and titanium-alloy bar and billet<\/td>\nGrade-specific<\/td>\nBar, billet<\/td>\nGeneral commercial bar specification; do not substitute its grade designations for F136<\/td>\n<\/tr>\n
ASTM B863<\/td>\nTitanium and titanium-alloy wire<\/td>\nGrade-specific<\/td>\nDraht<\/td>\nGeneral commercial wire specification; use only when the drawing separately requires it<\/td>\n<\/tr>\n
ISO 5832-2:2025<\/td>\nUnalloyed titanium for surgical-implant manufacture<\/td>\nSix tensile-strength grades<\/td>\nWrought material<\/td>\nSeparate ISO material system; not a direct Grade 1-4 conversion table<\/td>\n<\/tr>\n
ISO 5832-3:2021<\/td>\nWrought Ti-6Al-4V for surgical-implant manufacture<\/td>\nTi-6Al-4V<\/td>\nWrought material<\/td>\nSeparate ISO chemistry and test requirements<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Standard scopes and UNS are. ASTM F136 and F1472 identify distinct UNS grades. ISO 5832-2 and ISO 5832-3 use their own material definitions, so do not convert between ASTM and ISO by nickname alone; match chemistry, mechanical requirements and revision to the drawing.<\/em><\/p>\n

ASTM F67, F136 and F1472 each cover bar within their own scope. A drawing may separately call for a B-series product specification, but the purchaser and supplier must reconcile the grade designation and every chemical, mechanical and dimensional requirement rather than assume automatic dual certification. European orders may cite the ISO 5832 series instead of an ASTM implant specification; the systems are not word-for-word equivalents, so the drawing and certificate revision govern.<\/p>\n

Commercially pure titanium: which of Grades 1 to 4?<\/h2>\n

CP titanium is the corrosion-resistance workhorse of the implant world, chosen where a part does not carry heavy load. All four grades share near-identical corrosion behavior and differ only in strength and formability, which rise with controlled oxygen from Grade 1 to Grade 4. Grade 2 is the default for most CP work; Grade 1 wins where forming governs; Grade 4 is the strongest CP grade and appears in dental and higher-load CP parts. Because corrosion resistance is common across the four, moving off Grade 2 is a strength or forming decision, not a corrosion one. The full selection logic, service-by-service, is covered in depth in our CP titanium Grades 1-4 selection guide<\/a>.<\/p>\n

Specifying CP implant bar to ASTM F67<\/h2>\n

When a CP part is an implant, ASTM F67 controls the implant material. F67 covers Grades 1 to 4 in strip, sheet, plate, bar, billet, forging and wire. On the RFQ, the finish, diameter tolerance, grain size and hydrogen limit decide whether the bar runs cleanly on a Swiss lathe and passes incoming inspection, not the grade number alone. How to state those requirements is covered in depth in our ASTM F67 medical CP bar guide<\/a>.<\/p>\n

Ti-6Al-4V ELI to ASTM F136 for load-bearing implants<\/h2>\n

For many load-bearing devices, the titanium alloy specified is Ti-6Al-4V. Where fatigue and fracture toughness govern, a common choice is the extra-low-interstitial grade: Ti-6Al-4V ELI, Grade 23, UNS R56401, to ASTM F136. ELI retains the nominal 6% aluminum and 4% vanadium alloy basis while applying tighter interstitial limits than standard Grade 5. Where a drawing permits standard interstitial content, ASTM F1472 (Grade 5, R56400) applies instead; the two are not interchangeable and the UNS on the certificate must match. What ELI means, F136 versus F1472, and how to specify bar and fine wire is covered in depth in our ASTM F136 ELI bar guide<\/a>.<\/p>\n

Grain size and hydrogen: the acceptance criteria<\/h2>\n

Beyond grade and dimensions, grain size and hydrogen are two metallurgical criteria that may be added to implant-bar acceptance. They are normally reviewed through the mill test report or a separately required test report; independent testing remains possible when the purchase specification requires it. The quick-reference below aggregates common call-outs; the measurement methods and RFQ wording are covered in depth in our grain size and hydrogen guide<\/a>.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Acceptance criterion<\/th>\nTypical medical call-out<\/th>\nHow verified<\/th>\nSource<\/th>\n<\/tr>\n<\/thead>\n
Grain size<\/td>\nASTM E112 number, higher is finer; commonly \u22655.0 general, \u22658.0 precision<\/td>\nMetallographic, polished and etched section<\/td>\n\/<\/td>\n<\/tr>\n
Hydrogen, CP (F67)<\/td>\n0.015% (150 ppm) max<\/td>\nInert gas fusion at the mill<\/td>\n<\/td>\n<\/tr>\n
Hydrogen, Ti-6Al-4V ELI (F136)<\/td>\n0.012% (120 ppm) max, confirm current revision<\/td>\nInert gas fusion at the mill<\/td>\n<\/td>\n<\/tr>\n
Tighter hydrogen call-outs<\/td>\nDown to 0.0034% (34 ppm) on precision stock<\/td>\nVerified at the mill, not goods-in<\/td>\n<\/td>\n<\/tr>\n
Diameter tolerance<\/td>\n\u00b10.0005 in (\u00b10.0127 mm); unilateral +0\/-0.0004 in on Swiss stock<\/td>\nGauge at final grind<\/td>\n<\/td>\n<\/tr>\n
Oberfl\u00e4chenbeschaffenheit<\/td>\n32 RMS (\u22480.8 \u00b5m) ground<\/td>\nWareneingangspr\u00fcfung<\/td>\n<\/td>\n<\/tr>\n
Microstructure<\/td>\nEquiaxed alpha (CP) or equiaxed alpha-beta, no continuous grain-boundary alpha (ELI)<\/td>\nMetallographic report when required<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Any limit tighter than the standard has to be stated on the RFQ, because the mill has to verify it during production and it cannot be recovered at incoming inspection. Beiyu reviews any tighter-than-standard grain-size or hydrogen limit per order against mill capability.<\/p>\n

Which product form for which implant application?<\/h2>\n

Implant makers buy titanium as mill products and machine or form the finished device themselves. The form drives the companion product standard and the finishing.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Form<\/th>\nTypical implant applications<\/th>\nCommon standards<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Stange<\/td>\nOrthopedic screws and rods, dental posts, trauma-plate stock<\/td>\nF67 or F136, with B348<\/td>\nPrecision centerless ground for Swiss machining<\/td>\n<\/tr>\n
Draht<\/td>\nFine device components, spinal cable, K-wire stock<\/td>\nF67 or F136, with B863<\/td>\nFine down to sub-millimetre on spools, \u00d80.58 mm seen<\/td>\n<\/tr>\n
Platte und Blech<\/td>\nBone plates, maxillofacial plates; titanium alloy plate for load-bearing sites<\/td>\nF67 for CP, with B265; alloy plate per the applicable wrought spec<\/td>\nState thickness and flatness<\/td>\n<\/tr>\n
Foil \/ thin sheet<\/td>\nBarrier membranes, thin device components<\/td>\nB265<\/td>\n0.127 mm is a common thin call-out<\/td>\n<\/tr>\n
Forging \/ billet<\/td>\nNear-net implant preforms such as hip-stem blanks<\/td>\nF136 or F1472<\/td>\nMachined from the forging<\/td>\n<\/tr>\n
Porous structure<\/td>\nOsseointegration surfaces and scaffolds<\/td>\nApplication-specific<\/td>\nSintered or additively built; a distinct form from wrought mill product<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Beiyu supplies CP titanium as bar, wire, sheet and plate, and Ti-6Al-4V ELI as bar and wire, against one documentation chain; fine implant wire is described on our thin titanium wire page<\/a>. Porous titanium is used across the industry to promote bone in-growth on implant surfaces, but it is a separate product form specified differently from wrought bar or plate.<\/p>\n

What does the 2026 titanium supply picture mean for implant buyers?<\/h2>\n

One published titanium price-tracker series placed its global mill-product average at USD 9.42\/kg in Q1 2026, up from USD 7.92\/kg in Q1 2025. The same series reported Q1 2026 regional index points of USD 14.48\/kg for Europe and USD 6.49\/kg for North America. These are broad regional tracker values, not quotations for ASTM F136 or other implant-certified stock; grade, melt route, testing, finish, quantity and documentation can move an actual RFQ far from the index.<\/p>\n

For a medical buyer the practical reading is simple: qualified implant-grade capacity is the scarcest slice of that market, so locking specifications early, confirming lead time at RFQ stage, and qualifying a second documentation-complete source are worth more in 2026 than chasing spot price. What moves the underlying price is covered in our guide to what drives titanium prices<\/a>.<\/p>\n

How is implant-grade material certified and traced?<\/h2>\n

Medical buyers qualify the paper trail as strictly as the metal, so the certificate is the acceptance record. For implant scope, material can be sourced from mills operating certified ISO 13485 quality systems, and the producing mill’s certificates accompany the material per order, so the certificate entity always matches the mill on the mill test certificate. When the order requires EN 10204 3.1 documentation, the RFQ should define the heat or lot traceability, chemistry, mechanical results and any grain-size or hydrogen reporting required by the drawing. ELI status in particular is provable only by chemistry: the certificate must show the interstitial limits met and UNS R56401 identified, because a bar certified only to standard Grade 5 (R56400) is not F136 material. Beiyu supplies implant-grade mill products for manufacturers to machine into finished devices, and does not supply finished implants.<\/p>\n

What to put on a titanium implant material RFQ<\/h2>\n

A titanium implant material RFQ that can be quoted in one pass states the grade, the standards, the form and dimensions, and the acceptance criteria together.<\/p>\n

If the order is specifically for implant-chain bar rather than a wider implant-material map, our medical titanium bar RFQ checklist<\/a> turns the line items into a field-by-field purchase check before the enquiry goes out.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
RFQ field<\/th>\nWhat to state<\/th>\n<\/tr>\n<\/thead>\n
Grade and type<\/td>\nCP Grade 1\/2\/3\/4, or Ti-6Al-4V ELI (Grade 23) \/ standard (Grade 5)<\/td>\n<\/tr>\n
Governing standards<\/td>\nImplant material spec (F67, F136, F1472 or the applicable ISO 5832 part); add a separate product standard only when the drawing requires it and all grade requirements are reconciled<\/td>\n<\/tr>\n
Form and dimensions<\/td>\nBar, wire, plate or forging; diameter or thickness, length or spool<\/td>\n<\/tr>\n
Toleranz<\/td>\nDiameter or thickness tolerance, unilateral if required<\/td>\n<\/tr>\n
Oberfl\u00e4chenbeschaffenheit<\/td>\nGround finish target, for example 32 RMS (\u22480.8 \u00b5m)<\/td>\n<\/tr>\n
Zustand<\/td>\nAnnealed, or as specified<\/td>\n<\/tr>\n
Grain size<\/td>\nMinimum ASTM E112 number, reported on the certificate<\/td>\n<\/tr>\n
Hydrogen<\/td>\nMaximum content, and any tighter-than-standard limit<\/td>\n<\/tr>\n
Microstructure<\/td>\nRequired alpha or alpha-beta condition when the drawing calls for it<\/td>\n<\/tr>\n
Zertifikat<\/td>\nEN 10204 3.1 mit R\u00fcckverfolgbarkeit \u00fcber die Chargennummer<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Send the drawing or specification and Beiyu reviews each line against grind and metallurgical capability before quoting.<\/p>\n

For the standard-interstitial branch of implant Ti-6Al-4V, including how ASTM F1472 differs from F136 and how ASTM F620 forgings keep the source-material UNS, see our ASTM F1472 standard-interstitial spec guide<\/a>.<\/p>\n

H\u00e4ufig gestellte Fragen<\/h2>\n

Welcher Titan-Grade wird f\u00fcr medizinische Implantate verwendet?<\/strong>
\nIt depends on load. Commercially pure titanium in Grades 1 to 4, to ASTM F67, is used for corrosion-driven and lower-load parts. For load-bearing implants the metal is the Ti-6Al-4V alloy: extra-low-interstitial Grade 23 to ASTM F136 for fatigue-critical orthopedic, spinal and trauma parts, or standard-interstitial Grade 5 to ASTM F1472 where a drawing permits. The drawing and its cited standard set the exact grade.<\/p>\n

What titanium alloy is used for medical implants?<\/strong>
\nThe titanium alloy used for medical implants is Ti-6Al-4V. It comes in two implant grades: extra-low-interstitial Grade 23 (UNS R56401) to ASTM F136, commonly specified for load-bearing and fatigue-critical implants, and standard-interstitial Grade 5 (UNS R56400) to ASTM F1472. ELI is selected where the drawing requires its tighter interstitial limits; the UNS on the certificate must match the specified grade.<\/p>\n

Is implant-grade titanium the same as medical grade titanium?<\/strong>
\n“Medical grade titanium” is an informal umbrella term. For an implant it means titanium certified to a surgical-implant standard: CP titanium to ASTM F67 or ISO 5832-2, or Ti-6Al-4V to ASTM F136, F1472 or ISO 5832-3. The same phrase is used loosely in body-jewelry marketing, usually meaning Grade 23 or Grade 5 without any implant-standard certification. For an implant, specify the ASTM or ISO standard, not the phrase itself.<\/p>\n

Which titanium grade is best for orthopedic implants?<\/strong>
\nFor load-bearing orthopedic implants, Ti-6Al-4V ELI (Grade 23) to ASTM F136 is frequently specified because its tighter interstitial limits support fracture-toughness and fatigue requirements. Commercially pure titanium to ASTM F67 is used for orthopedic parts that are corrosion-driven or lower-load rather than fatigue-critical. The drawing decides.<\/p>\n

Is porous titanium used for medical implants?<\/strong>
\nYes. Porous titanium, sintered or additively built, is used to create surfaces that bone grows into, improving fixation on orthopedic and dental implants. It is a distinct product form from wrought bar, wire or plate and is specified by its own application requirements rather than a bar or plate standard.<\/p>\n

What standards do implant titanium bars ship against?<\/strong>
\nImplant bar ships against a surgical-implant material standard, ASTM F67 for CP or ASTM F136 for Ti-6Al-4V ELI, and is documented on the required mill test certificate with heat-number traceability. A drawing may separately require a general bar standard, but the grade and all acceptance requirements must be reconciled rather than assumed equivalent. European buyers may cite ISO 5832-2 or ISO 5832-3 in place of an ASTM implant specification.<\/p>\n

Request a quote for implant-grade titanium<\/h2>\n

To quote implant-grade titanium, Beiyu needs: grade and type (CP 1\/2\/3\/4, or Ti-6Al-4V ELI Grade 23 \/ standard Grade 5), the governing implant and product standards, form and dimensions, tolerance, surface finish, condition, and any grain-size or hydrogen requirement<\/strong>. Send the drawing or specification and we review each line against grind and metallurgical capability before quoting, with EN 10204 3.1 mill test certificates and heat-number traceability by order scope. Beiyu supplies mill products for implant manufacturing, not finished devices. Kontaktieren Sie Beiyu Titanium f\u00fcr eine Anfrage.<\/a><\/p>\n

\n

\u00dcber den Autor<\/h2>\n

Penn Ma<\/strong> hat 15 Jahre Titanexport bei Beiyu Titanium hinter sich und pr\u00fcft dort Titan- und Nickellegierungs-Anfragen, Grade-Auswahl, Zeugnisumfang und norm\u00fcbergreifende Bezeichnungen selbst. Er arbeitet \u00fcber Stab, Rundmaterial, Platte, Rohr, Block, Ring, Coil, Ingot, Schmiedeteile und spanend bearbeitete Teile hinweg, mit Dokumentation 3.1 nach EN 10204 und R\u00fcckverfolgbarkeit \u00fcber die Chargennummer im t\u00e4glichen Einsatz. Zum vollst\u00e4ndigen Autorenprofil<\/a>.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"

Titan f\u00fcr medizinische Implantate: CP Grades 1-4 nach ASTM F67, Ti-6Al-4V ELI Grade 23 nach F136 sowie F1472- und ISO 5832-Normen, Formen und 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