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Automotive Grey Cast Iron vs. ACI-ASTM CN3MN Steel

Both automotive grey cast iron and ACI-ASTM CN3MN 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 CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
180
Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 9.6 to 14
39
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69 to 70
80
Tensile Strength: Ultimate (UTS), MPa 140 to 290
620
Tensile Strength: Yield (Proof), MPa 94 to 200
300

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
310
Melting Completion (Liquidus), °C 1380 to 1390
1460
Melting Onset (Solidus), °C 1340 to 1350
1410
Specific Heat Capacity, J/kg-K 490
460
Thermal Conductivity, W/m-K 41 to 43
13
Thermal Expansion, µm/m-K 12 to 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
33
Density, g/cm3 7.5 to 7.6
8.1
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
6.2
Embodied Energy, MJ/kg 21 to 24
84
Embodied Water, L/kg 44 to 51
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
200
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.2 to 11
21
Strength to Weight: Bending, points 8.0 to 13
20
Thermal Diffusivity, mm2/s 11 to 12
3.4
Thermal Shock Resistance, points 4.2 to 8.6
14