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SAE-AISI M50 Steel vs. Automotive Grey Cast Iron

Both SAE-AISI M50 steel and automotive grey cast iron are iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M50 steel and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
69 to 70
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
140 to 290

Thermal Properties

Latent Heat of Fusion, J/g 260
260 to 280
Melting Completion (Liquidus), °C 1480
1380 to 1390
Melting Onset (Solidus), °C 1440
1340 to 1350
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 35
41 to 43
Thermal Expansion, µm/m-K 13
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.8 to 9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.9 to 3.0
Density, g/cm3 7.9
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 5.1
1.5 to 1.7
Embodied Energy, MJ/kg 74
21 to 24
Embodied Water, L/kg 83
44 to 51

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 80
5.2 to 11
Strength to Weight: Bending, points 23 to 49
8.0 to 13
Thermal Diffusivity, mm2/s 9.7
11 to 12
Thermal Shock Resistance, points 21 to 66
4.2 to 8.6