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Automotive Grey Cast Iron vs. ASTM Grade HC Steel

Both automotive grey cast iron and ASTM grade HC steel are iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is ASTM grade HC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6 to 14
6.0
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 69 to 70
80
Tensile Strength: Ultimate (UTS), MPa 140 to 290
430
Tensile Strength: Yield (Proof), MPa 94 to 200
200

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
1370
Specific Heat Capacity, J/kg-K 490
490
Thermal Conductivity, W/m-K 41 to 43
17
Thermal Expansion, µm/m-K 12 to 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
14
Density, g/cm3 7.5 to 7.6
7.6
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
2.8
Embodied Energy, MJ/kg 21 to 24
40
Embodied Water, L/kg 44 to 51
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
21
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
95
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 5.2 to 11
16
Strength to Weight: Bending, points 8.0 to 13
16
Thermal Diffusivity, mm2/s 11 to 12
4.5
Thermal Shock Resistance, points 4.2 to 8.6
14