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Grey Cast Iron vs. SAE-AISI M42 Steel

Both grey cast iron and SAE-AISI M42 steel are iron alloys. They have 81% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grey cast iron and the bottom bar is SAE-AISI M42 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 69
78
Tensile Strength: Ultimate (UTS), MPa 160 to 450
810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1380
1540
Melting Onset (Solidus), °C 1180
1490
Specific Heat Capacity, J/kg-K 490
450
Thermal Conductivity, W/m-K 46
20
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
30
Density, g/cm3 7.5
8.2
Embodied Carbon, kg CO2/kg material 1.5
7.4
Embodied Energy, MJ/kg 21
100
Embodied Water, L/kg 44
140

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.8 to 17
28 to 79
Strength to Weight: Bending, points 8.7 to 17
24 to 48
Thermal Diffusivity, mm2/s 13
5.4
Thermal Shock Resistance, points 6.0 to 17
25 to 71

Alloy Composition

Carbon (C), % 3.1 to 3.4
1.1 to 1.2
Chromium (Cr), % 0
3.5 to 4.3
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 92.1 to 93.9
76.3 to 81
Manganese (Mn), % 0.5 to 0.7
0.15 to 0.4
Molybdenum (Mo), % 0
9.0 to 10
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.9
0 to 0.030
Silicon (Si), % 2.5 to 2.8
0.15 to 0.65
Sulfur (S), % 0 to 0.15
0 to 0.030
Tungsten (W), % 0
1.2 to 1.9
Vanadium (V), % 0
1.0 to 1.4