Automotive Malleable Cast Iron vs. ASTM B631 Class B

Automotive malleable cast iron belongs to the iron alloys classification, while ASTM B631 class B 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 malleable cast iron and the bottom bar is ASTM B631 class B.

Automotive Malleable Cast Iron ASTM B631 Class B Silver-Tungsten Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.29
Poisson's Ratio		0.31

Shear Modulus, GPa		70
Shear Modulus, GPa		78 to 79

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		150

Melting Completion (Liquidus), °C		1410
Melting Completion (Liquidus), °C		2460 to 2480

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		170

Thermal Conductivity, W/m-K		41
Thermal Conductivity, W/m-K		450

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.4
Electrical Conductivity: Equal Volume, % IACS		50 to 53

Electrical Conductivity: Equal Weight (Specific), % IACS		8.7
Electrical Conductivity: Equal Weight (Specific), % IACS		32 to 34

Otherwise Unclassified Properties

Density, g/cm³		7.6
Density, g/cm³		14

Embodied Carbon, kg CO₂/kg material		1.5
Embodied Carbon, kg CO₂/kg material		49

Embodied Energy, MJ/kg		20
Embodied Energy, MJ/kg		760

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		8.1

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		14

Thermal Diffusivity, mm²/s		11
Thermal Diffusivity, mm²/s		190