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Automotive Grey Cast Iron vs. EN AC-46200 Aluminum

Automotive grey cast iron belongs to the iron alloys classification, while EN AC-46200 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-46200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
82
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
210
Tensile Strength: Yield (Proof), MPa 94 to 200
130

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
510
Melting Completion (Liquidus), °C 1380 to 1390
620
Melting Onset (Solidus), °C 1340 to 1350
540
Specific Heat Capacity, J/kg-K 490
880
Thermal Conductivity, W/m-K 41 to 43
110
Thermal Expansion, µm/m-K 12 to 14
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
28
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
88

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
10
Density, g/cm3 7.5 to 7.6
2.8
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
1060

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
2.0
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 5.2 to 11
21
Strength to Weight: Bending, points 8.0 to 13
28
Thermal Diffusivity, mm2/s 11 to 12
44
Thermal Shock Resistance, points 4.2 to 8.6
9.5