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Automotive Grey Cast Iron vs. 515.0 Aluminum

Automotive grey cast iron belongs to the iron alloys classification, while 515.0 aluminum belongs to the aluminum alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, 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 515.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
70
Elongation at Break, % 9.6 to 14
10
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 69 to 70
26
Tensile Strength: Ultimate (UTS), MPa 140 to 290
280

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
470
Melting Completion (Liquidus), °C 1380 to 1390
620
Melting Onset (Solidus), °C 1340 to 1350
620
Specific Heat Capacity, J/kg-K 490
900
Thermal Expansion, µm/m-K 12 to 14
23

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
8.4
Embodied Energy, MJ/kg 21 to 24
150
Embodied Water, L/kg 44 to 51
1120

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 5.2 to 11
30
Strength to Weight: Bending, points 8.0 to 13
36
Thermal Shock Resistance, points 4.2 to 8.6
13