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Grade 12 Titanium vs. ASTM B631 Class B

Grade 12 titanium belongs to the titanium alloys classification, while ASTM B631 class B belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is grade 12 titanium and the bottom bar is ASTM B631 class B.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Poisson's Ratio 0.32
0.31
Shear Modulus, GPa 39
78 to 79

Thermal Properties

Latent Heat of Fusion, J/g 420
150
Melting Completion (Liquidus), °C 1660
2460 to 2480
Specific Heat Capacity, J/kg-K 540
170
Thermal Conductivity, W/m-K 21
450
Thermal Expansion, µm/m-K 9.6
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.3
50 to 53
Electrical Conductivity: Equal Weight (Specific), % IACS 6.6
32 to 34

Otherwise Unclassified Properties

Density, g/cm3 4.5
14
Embodied Carbon, kg CO2/kg material 31
49
Embodied Energy, MJ/kg 500
760

Common Calculations

Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 35
14
Thermal Diffusivity, mm2/s 8.5
190