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SAE-AISI M2 Steel vs. Automotive Grey Cast Iron

Both SAE-AISI M2 steel and automotive grey cast iron are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M2 steel and the bottom bar is automotive 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 77
69 to 70
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
140 to 290

Thermal Properties

Latent Heat of Fusion, J/g 260
260 to 280
Melting Completion (Liquidus), °C 1610
1380 to 1390
Melting Onset (Solidus), °C 1570
1340 to 1350
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 22
41 to 43
Thermal Expansion, µm/m-K 10
12 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 24
1.9 to 3.0
Density, g/cm3 8.4
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 8.8
1.5 to 1.7
Embodied Energy, MJ/kg 130
21 to 24
Embodied Water, L/kg 98
44 to 51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 25 to 71
5.2 to 11
Strength to Weight: Bending, points 22 to 44
8.0 to 13
Thermal Diffusivity, mm2/s 5.9
11 to 12
Thermal Shock Resistance, points 27 to 76
4.2 to 8.6