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Automotive Grey Cast Iron vs. ACI-ASTM CH20 Steel

Both automotive grey cast iron and ACI-ASTM CH20 steel are iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
190
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6 to 14
38
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 69 to 70
78
Tensile Strength: Ultimate (UTS), MPa 140 to 290
610
Tensile Strength: Yield (Proof), MPa 94 to 200
350

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
310
Melting Completion (Liquidus), °C 1380 to 1390
1410
Melting Onset (Solidus), °C 1340 to 1350
1430
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 41 to 43
14
Thermal Expansion, µm/m-K 12 to 14
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
20
Density, g/cm3 7.5 to 7.6
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
3.7
Embodied Energy, MJ/kg 21 to 24
53
Embodied Water, L/kg 44 to 51
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
200
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.2 to 11
22
Strength to Weight: Bending, points 8.0 to 13
21
Thermal Diffusivity, mm2/s 11 to 12
3.7
Thermal Shock Resistance, points 4.2 to 8.6
15