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Automotive Grey Cast Iron vs. B535.0 Aluminum

Automotive grey cast iron belongs to the iron alloys classification, while B535.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 B535.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
65
Elastic (Young's, Tensile) Modulus, GPa 180
66
Elongation at Break, % 9.6 to 14
10
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 69 to 70
25
Tensile Strength: Ultimate (UTS), MPa 140 to 290
260
Tensile Strength: Yield (Proof), MPa 94 to 200
130

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
390
Melting Completion (Liquidus), °C 1380 to 1390
630
Melting Onset (Solidus), °C 1340 to 1350
550
Specific Heat Capacity, J/kg-K 490
910
Thermal Conductivity, W/m-K 41 to 43
96
Thermal Expansion, µm/m-K 12 to 14
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
24
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
82

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
9.5
Density, g/cm3 7.5 to 7.6
2.6
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
9.4
Embodied Energy, MJ/kg 21 to 24
160
Embodied Water, L/kg 44 to 51
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
22
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 5.2 to 11
28
Strength to Weight: Bending, points 8.0 to 13
35
Thermal Diffusivity, mm2/s 11 to 12
40
Thermal Shock Resistance, points 4.2 to 8.6
11