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ASTM B631 Class A vs. Grade 20 Titanium

ASTM B631 class A belongs to the otherwise unclassified metals classification, while grade 20 titanium belongs to the titanium alloys. 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 B631 class A and the bottom bar is grade 20 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Poisson's Ratio 0.3
0.32
Shear Modulus, GPa 85 to 86
47

Thermal Properties

Latent Heat of Fusion, J/g 160
400
Melting Completion (Liquidus), °C 2680 to 2690
1660
Specific Heat Capacity, J/kg-K 160
520
Thermal Expansion, µm/m-K 11
9.6

Otherwise Unclassified Properties

Density, g/cm3 15
5.0
Embodied Carbon, kg CO2/kg material 43
52
Embodied Energy, MJ/kg 670
860

Common Calculations

Stiffness to Weight: Axial, points 8.5
14
Stiffness to Weight: Bending, points 14
33

Comparable Variants