Ti-6Al-4V Grade 5 Titanium Alloy Supplier
Description
Grade 5 Titanium (Ti-6Al-4V / TA6V / 3.7164) is the most widely used titanium alloy in the world, accounting for approximately 50% of global titanium consumption. Known as the “workhorse alloy”, it combines high mechanical strength (tensile strength ≥ 895 MPa), low density (4.43 g/cm³) and excellent corrosion resistance — making it the standard material for aerospace structures, medical instrumentation, marine components and high-performance industrial applications.
Grade 5 differs from Grade 23 (Ti-6Al-4V ELI / TA6V ELI) by its higher interstitial content — specifically oxygen (max. 0.20% vs. 0.13% for ELI). This gives Grade 5 higher tensile strength, while Grade 23 offers superior fracture toughness and ductility for implantable medical devices.
STAINLESS stocks Grade 5 Titanium from multiple qualified and approved sources, available in a wide range of diameters and dimensions to meet your machining and processing requirements. Cut-to-length, slugs and made-to-measure formats are available directly from our service centres.
Every delivery is accompanied by the producer’s certificate of origin, full chemical and mechanical test reports, and complete melt traceability, meeting the documentation requirements of the aerospace, medical and defence industries worldwide.
Main applications
Ti-6Al-4V is used in particular in the manufacture of structural and engine parts, but also in aeronautical fasteners. TA6V4 is highly resistant to corrosion, which makes it suitable for use in marine environments, the surface treatment industry and the deck fittings industry. The material is available mainly in the annealed state but can be treated (STA) with a temperature resistance close to 350°C.
Metallurgy
Grade 5 Titanium can be produced with one or more VAR denials depending on the criticality of the applications. The elaboration processes associated with the transformation processes make it possible to obtain a homogeneous alpha/beta microstructure with a structure type A1 to A9. See micrograph below:
Machinability
Forgeability/Usability
The grade can be hot forged below beta transus (<950°C). Machining of this grade requires sufficient coolant to limit heating. The grade is difficult to work cold because of seizure.
Polishability
The high level of inclusionary cleanliness and the homogeneity of the microstructure of this grade allows optimum polishing, particularly if the microstructure is fine.
Heat treatments
Annealing can be carried out from 700°C after forging. However, this treatment must remain under control so as not to degrade the quality of the microstructure. After annealing, the oxidised surface is removed mechanically or chemically to remove the contamination layer (alpha case).
A heat treatment of quenching followed by ageing (STA) is possible on this grade depending on the dimensions in order to increase the mechanical properties up to about 1100MPa.
Corrosion resistance
Ti-6Al-4V (Grade 5 Titanium) is highly resistant to general and pitting corrosion. Chlorinated solvents should be avoided. Titanium is also susceptible to hydrogen embrittlement, so it is important to limit any hydrogen input during heat treatment or chemical pickling processes.
Standard Sizes
3m round bars in the annealed condition – Surface ground or peeled
Flat bars made to measure or forged blocks in the annealed state (consult us)
Powders – Sheets – Wires
Grade 5 Titanium - Frequently Asked Questions
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What is Grade 5 Titanium?
Grade 5 Titanium, also known as Ti-6Al-4V, TA6V or UNS R56400, is the most widely used titanium alloy in the world — accounting for approximately 50% of global titanium consumption. It is an alpha-beta alloy containing 6% aluminium and 4% vanadium, combining high mechanical strength (tensile strength ≥ 895 MPa in the annealed condition), low density (4.43 g/cm³), excellent corrosion resistance and good weldability. It is the standard material for structural aerospace components, medical instrumentation and high-performance engineering applications.
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What is the difference between Grade 5 and Grade 23 titanium?
Both grades share the same Ti-6Al-4V composition but differ in maximum interstitial content. Grade 23 (Ti-6Al-4V ELI – Extra Low Interstitials) has a lower maximum oxygen content (0.13% vs 0.20%), lower iron and nitrogen, which improves fracture toughness and ductility at slightly lower tensile strength. Grade 23 is required for implantable medical devices (ASTM F136, ISO 5832-3 ELI) and fracture-critical airframe structures. Grade 5 is preferred when maximum strength and machinability are the priority – aerospace fasteners, surgical instruments, motorsport and industrial components.
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What does Ti-6Al-4V mean?
Ti-6Al-4V is the chemical shorthand for the alloy: Ti = titanium (base metal), 6Al = 6% aluminium (alpha stabiliser), 4V = 4% vanadium (beta stabiliser). The resulting two-phase alpha-beta microstructure provides the alloy’s characteristic combination of strength, toughness and processability. It is also referred to as Grade 5 (ASTM designation), TA6V (French/European designation), TiAl6V4, 3.7165 (Werkstoffnummer) or UNS R56400.
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What are the AMS specifications for Grade 5 Titanium?
The primary AMS specifications covering Grade 5 Titanium are: AMS 4928 (bar, billet and rod in the annealed condition – the most widely referenced aerospace specification), AMS 4965 (bar and billet in the solution treated and aged condition), and AMS 4963 (wire). Other applicable standards include ASTM B348 (bar and billet), ASTM F1472 (surgical implant applications), ISO 5832-3 and EN 3311. STAINLESS supplies material certified to these specifications with original mill test reports.
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What is the tensile strength of Grade 5 Titanium?
In the standard annealed (mill annealed) condition, Grade 5 Titanium has a minimum tensile strength (Rm) of 895 MPa and a minimum 0.2% yield strength (Rp0.2) of 828 MPa, with elongation ≥ 10%. In the solution treated and aged (STA) condition, tensile strength increases to ≥ 1,100 MPa and yield strength to ≥ 1,000 MPa. The STA treatment is applicable to sections up to approximately 25mm and delivers significantly higher mechanical properties for the most demanding aerospace and structural applications.
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Is Grade 5 Titanium biocompatible and suitable for medical implants?
Grade 5 Titanium (Ti-6Al-4V) is biocompatible and widely used for surgical instrumentation, orthopaedic screws, dental abutments and non-implantable medical devices. However, for direct bone or tissue contact applications – such as hip and knee prostheses, bone plates, cardiovascular devices or spinal implants – Grade 23 (Ti-6Al-4V ELI, ASTM F136, ISO 5832-3 ELI) is the specified grade, as its reduced interstitial content provides superior fracture toughness and fatigue resistance in a physiological environment. STAINLESS stocks both grades for the medical market with full documentation.
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What formats is Grade 5 Titanium available in?
STAINLESS stocks Grade 5 Titanium in round bars and rods (ground or peeled, 3m lengths), flat bars, forged blocks and billets, sheets and plates, wires and metal powders for additive manufacturing. Cut-to-length and custom dimensions are available from our service centres. All material is delivered with the producer’s certificate of origin, full chemical and mechanical test reports, and melt traceability.
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How does Grade 5 Titanium compare to stainless steel?
Grade 5 Titanium offers a significantly better strength-to-weight ratio than stainless steel: its density (4.43 g/cm³) is approximately 43% lower than 316L stainless steel (7.98 g/cm³), while its tensile strength is comparable or higher. It also has superior corrosion resistance in chloride and marine environments, and full biocompatibility. The trade-offs are higher cost, more complex machining (requiring low cutting speeds and abundant coolant) and lower thermal conductivity. For applications where weight saving and corrosion performance are critical – aerospace, medical implants, marine – Grade 5 Titanium is preferred over stainless steel.