Alloy Overview Ti-6Al-4V (ASTM Grade 5 Titanium, UNS R56400) is a two-phase α+β titanium alloy, with aluminum (Al) as the alpha stabilizer and vanadium (V) as the beta stabilizer. Known as the “workhorse” of titanium alloys, it accounts for 50% of global titanium usage, valued for its high strength-to-weight ratio, formability, and corrosion resistance. It performs reliably from cryogenic temperatures up to 800°F (427°C) and is suitable for welded construction at service temperatures up to 600°F (316°C).
Chemical Composition (Weight %) Component Content Range Al 5.5 – 6.75 V 3.5 – 4.5 C Max 0.08 Fe Max 0.4 H Max 0.015 N Max 0.05 O Max 0.2 Ti 87.6 – 91 (balance)
Industry Specifications Region/Industry Specifications USA Aerospace AMS 4911, 4928, 4932, 4935, 4954, 4965, 4967 Germany Engineering 3.7165 Germany Aerospace 3.7164 France T-A6V UK Aerospace BS TA.10, 11, 12, 13, 28, 56; DTD 5363
Physical Properties Property Metric English Comments Density 4.42 g/cc 0.16 lb/in³ Typical Electrical Resistivity 0.000168 ohm-cm 0.000168 ohm-cm Magnetic Permeability 1.00005 1.00005 At 20 oersteds
Mechanical Properties Property Metric English Notes Tensile Strength (Ultimate) 1035 MPa 150,000 psi Typical Tensile Strength (Yield, 0.2% Proof) 980 MPa 142,000 psi Typical Elongation at Break 12% 12% Typical Modulus of Elasticity 105 – 120 GPa 15,200 – 17,400 ksi Typical Poisson’s Ratio 0.31 0.31 Fatigue Strength (Limit) 570 – 620 MPa 82,700 – 89,900 psi Test specifics not reported Shear Modulus 41 – 45 GPa 5,950 – 6,530 ksi Minimum Bend Radius 5t 5t For 0.078 in (2 mm) sheet
Thermal Properties Property Metric English Range Linear CTE (20°C) 9 μm/m-°C 5 μin/in-°F 0 – 100°C Linear CTE (250°C) 9.4 μm/m-°C 5.22 μin/in-°F 20 – 425°C Linear CTE (500°C) 9.7 μm/m-°C 5.39 μin/in-°F 20 – 650°C Specific Heat Capacity 0.586 J/g-°C 0.14 BTU/lb-°F Thermal Conductivity 6.6 W/m-K 45.8 BTU-in/hr-ft²-°F Melting Point (Liquidus) Min 1636°C; 1674°C Min 2980°F; 3050°F Maximum Service Temp (Air) 350°C 662°F Retains mechanical properties Beta Transus Temperature 995°C 1820°F
Applications Widely used in high-performance industries:
Aerospace: Jet engine compressor blades, discs, rings; airframe components; helicopter rotor hubs; rocket engine cases. Defense: Pressure vessels, critical forgings. General Engineering: Fasteners and components requiring high strength-to-weight ratios. Available Product Forms Pipe, tube, sheet, strip, plate, bar, forging stock, wire, and custom forgings.
