Titanium Ti-6Al-4V (Grade 5), Annealed

Subcategory: Alpha/Beta Titanium Alloy; Metal; Nonferrous Metal; Titanium Alloy

Close Analogs: 4 other heat treatments of this alloy are listed in MatWeb.

Key Words: Ti-6-4; UNS R56400; ASTM Grade 5 titanium; UNS R56401 (ELI); Ti6Al4V, biomaterials, biomedical implants, biocompatibility

Component   Wt. %
FeMax 0.25 
OMax 0.2 

Material Notes:
Information provided by Allvac and the references. Annealing Temperature 700-785C. Alpha-Beta Alloy.

Applications: Blades, discs, rings, airframes, fasteners, components. Vessels, cases, hubs, forgings. Biomedical implants.

Biocompatibility: Excellent, especially when direct contact with tissue or bone is required. Ti-6Al-4V's poor shear strength makes it undesirable for bone screws or plates. It also has poor surface wear properties and tends to seize when in sliding contact with itself and other metals. Surface treatments such as nitriding and oxidizing can improve the surface wear properties.

Physical PropertiesMetricEnglishComments
Density4.43 g/cc0.16 lb/in 

Mechanical Properties
Hardness, Brinell334334 Estimated from Rockwell C.
Hardness, Knoop363363 Estimated from Rockwell C.
Hardness, Rockwell C3636 
Hardness, Vickers349349 Estimated from Rockwell C.
Tensile Strength, Ultimate950 MPa138000 psi 
Tensile Strength, Yield880 MPa128000 psi 
Elongation at Break14 %14 % 
Reduction of Area36 %36 % 
Modulus of Elasticity113.8 GPa16500 ksi 
Compressive Yield Strength970 MPa141000 psi 
Notched Tensile Strength1450 MPa210000 psi Kt (stress concentration factor) = 6.7
Ultimate Bearing Strength1860 MPa270000 psi e/D = 2
Bearing Yield Strength1480 MPa215000 psi e/D = 2
Poisson's Ratio0.3420.342 
Charpy Impact17 J12.5 ft-lb V-notch
Fatigue Strength240 MPa34800 psi at 1E+7 cycles. Kt (stress concentration factor) = 3.3
Fatigue Strength510 MPa74000 psi Unnotched 10,000,000 Cycles
Fracture Toughness75 MPa-m68.3 ksi-in 
Shear Modulus44 GPa6380 ksi 
Shear Strength550 MPa79800 psi Ultimate shear strength

Electrical Properties
Electrical Resistivity0.000178 ohm-cm0.000178 ohm-cm 
Magnetic Permeability1.000051.00005 at 1.6kA/m
Magnetic Susceptibility3.3e-0063.3e-006 cgs/g

Thermal Properties
CTE, linear 20C8.6 m/m-C4.78 in/in-F 20-100C
CTE, linear 250C9.2 m/m-C5.11 in/in-F Average over the range 20-315C
CTE, linear 500C9.7 m/m-C5.39 in/in-F Average over the range 20-650C
Specific Heat Capacity0.5263 J/g-C0.126 BTU/lb-F 
Thermal Conductivity6.7 W/m-K46.5 BTU-in/hr-ft-F 
Melting Point1604 - 1660 C2920 - 3020 F 
Solidus1604 C2920 F 
Liquidus1660 C3020 F 
Beta Transus980 C1800 F 

References for this datasheet.

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