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ASTM B631 Class B vs. Grade Ti-Pd7B Titanium

ASTM B631 class B belongs to the otherwise unclassified metals classification, while grade Ti-Pd7B titanium belongs to the titanium alloys. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 B and the bottom bar is grade Ti-Pd7B titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Poisson's Ratio 0.31
0.32
Rockwell B Hardness 53 to 85
83
Shear Modulus, GPa 78 to 79
40

Thermal Properties

Latent Heat of Fusion, J/g 150
420
Melting Completion (Liquidus), °C 2460 to 2480
1660
Specific Heat Capacity, J/kg-K 170
540
Thermal Conductivity, W/m-K 450
22
Thermal Expansion, µm/m-K 12
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 50 to 53
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 32 to 34
7.1

Otherwise Unclassified Properties

Density, g/cm3 14
4.5
Embodied Carbon, kg CO2/kg material 49
49
Embodied Energy, MJ/kg 760
840

Common Calculations

Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 14
35
Thermal Diffusivity, mm2/s 190
8.9