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Automotive Grey Cast Iron vs. EN AC-45000 Aluminum

Automotive grey cast iron belongs to the iron alloys classification, while EN AC-45000 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
77
Elastic (Young's, Tensile) Modulus, GPa 180
73
Elongation at Break, % 9.6 to 14
1.1
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 69 to 70
27
Tensile Strength: Ultimate (UTS), MPa 140 to 290
180
Tensile Strength: Yield (Proof), MPa 94 to 200
110

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
470
Melting Completion (Liquidus), °C 1380 to 1390
640
Melting Onset (Solidus), °C 1340 to 1350
520
Specific Heat Capacity, J/kg-K 490
870
Thermal Conductivity, W/m-K 41 to 43
120
Thermal Expansion, µm/m-K 12 to 14
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
81

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
11
Density, g/cm3 7.5 to 7.6
3.0
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
7.7
Embodied Energy, MJ/kg 21 to 24
140
Embodied Water, L/kg 44 to 51
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
1.7
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
80
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 5.2 to 11
17
Strength to Weight: Bending, points 8.0 to 13
24
Thermal Diffusivity, mm2/s 11 to 12
47
Thermal Shock Resistance, points 4.2 to 8.6
8.0