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ASTM B631 Class A vs. C99400 Brass

ASTM B631 class A belongs to the otherwise unclassified metals classification, while C99400 brass belongs to the copper alloys. There are 14 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is C99400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
120
Poisson's Ratio 0.3
0.34
Shear Modulus, GPa 85 to 86
44

Thermal Properties

Latent Heat of Fusion, J/g 160
230
Melting Completion (Liquidus), °C 2680 to 2690
1070
Specific Heat Capacity, J/kg-K 160
400
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40 to 47
17
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
17

Otherwise Unclassified Properties

Density, g/cm3 15
8.7
Embodied Carbon, kg CO2/kg material 43
2.8
Embodied Energy, MJ/kg 670
45

Common Calculations

Stiffness to Weight: Axial, points 8.5
7.5
Stiffness to Weight: Bending, points 14
19