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Automotive Grey Cast Iron vs. ASTM B631 Class A

Automotive grey cast iron belongs to the iron alloys classification, while ASTM B631 class A belongs to the otherwise unclassified metals. There are 16 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 automotive grey cast iron and the bottom bar is ASTM B631 class A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 69 to 70
85 to 86

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
160
Melting Completion (Liquidus), °C 1380 to 1390
2680 to 2690
Specific Heat Capacity, J/kg-K 490
160
Thermal Conductivity, W/m-K 41 to 43
420
Thermal Expansion, µm/m-K 12 to 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
40 to 47
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
25 to 29

Otherwise Unclassified Properties

Density, g/cm3 7.5 to 7.6
15
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
43
Embodied Energy, MJ/kg 21 to 24
670

Common Calculations

Stiffness to Weight: Axial, points 13
8.5
Stiffness to Weight: Bending, points 25
14
Thermal Diffusivity, mm2/s 11 to 12
180