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ASTM B817 Type II vs. ASTM B631 Class C

ASTM B817 type II belongs to the titanium alloys classification, while ASTM B631 class C belongs to the otherwise unclassified metals. There are 12 material properties with values for both materials. Properties with values for just one material (19, 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 ASTM B817 type II and the bottom bar is ASTM B631 class C.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
180 to 190
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
66 to 71

Thermal Properties

Latent Heat of Fusion, J/g 400
140 to 150
Melting Completion (Liquidus), °C 1580
2090 to 2230
Specific Heat Capacity, J/kg-K 550
180
Thermal Expansion, µm/m-K 9.9
14

Otherwise Unclassified Properties

Density, g/cm3 4.6
13 to 14
Embodied Carbon, kg CO2/kg material 40
55 to 59
Embodied Energy, MJ/kg 650
860 to 920

Common Calculations

Stiffness to Weight: Axial, points 13
7.4 to 7.6
Stiffness to Weight: Bending, points 34
14