TC4 / Ti-6Al-4V (ASTM Grade 5) Alpha-Beta Titanium Alloy

TC4 is the most widely used α+β titanium alloy in the world, of nominal composition Ti-6Al-4V, corresponding to international ASTM Grade 5 / UNS R56400 / AMS 4911 / ISO 5832-3. It combines high specific strength, good fracture toughness, excellent corrosion resistance and proven biocompatibility, and is the benchmark titanium alloy for aerospace, medical, marine and high-performance consumer applications.

Overview

• Material: TC4 — Ti-6Al-4V α+β titanium alloy
• International equivalents: ASTM Gr.5 / UNS R56400 / AMS 4911 / ISO 5832-3 (medical)
• Available forms: Bar, plate, sheet, strip, tube, wire, forgings and fasteners

Chemical Composition (wt%)

Other elements: each ≤ 0.10 %, total ≤ 0.40 %.

Physical Properties

Mechanical Properties

Key Features

• Excellent all-round properties: high strength combined with good ductility;
• High specific strength — low density yet high strength, ideal for lightweighting;
• Strong corrosion resistance against many media;
• Good hot strength for long-term service at 400 °C;
• Good cryogenic toughness, retained at low temperature;
• Excellent biocompatibility for medical implants.

Fabrication & Heat Treatment

• Melting: vacuum arc remelting (VAR) for uniform composition and low impurities.
• Hot working: forged, rolled or extruded at 850–1000 °C with controlled heating to avoid overheating / burning.
• Cold working: cold rolled and cold drawn; intermediate annealing at approx. 650–700 °C at high cold-reduction levels.
• Welding: TIG welding after thorough cleaning, with suitable parameters and inert-gas shielding.
• Annealing: 700–800 °C for 1–2 h, air cool.
• Solution treatment & ageing: solution treat at 900–950 °C then rapid cool; age at 500–550 °C to raise strength.

Typical Applications

• Aerospace: wing spars, fuselage frames, wing panels, engine fan discs and blades, landing-gear components; spacecraft structures and engine parts;
• Medical: artificial joints, bone-fixation devices and dental implants (per ISO 5832-3 / ASTM F136 where applicable);
• Chemical: reaction towers, heat exchangers, piping and valves;
• Sports & consumer: high-end bicycle frames, tennis rackets and golf-club components;
• Marine: vessel and offshore-platform structures and seawater piping systems.

For detailed datasheets, mill certificates (EN 10204 3.1) or inquiries on specific sizes and tolerances, please contact our sales & engineering team.