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SAE-AISI M42 Steel vs. Grey Cast Iron

Both SAE-AISI M42 steel and grey cast iron 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 SAE-AISI M42 steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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