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Automotive Grey Cast Iron vs. 6005 Aluminum

Automotive grey cast iron belongs to the iron alloys classification, while 6005 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 6005 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
90 to 95
Elastic (Young's, Tensile) Modulus, GPa 180
68
Elongation at Break, % 9.6 to 14
9.5 to 17
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 69 to 70
26
Tensile Strength: Ultimate (UTS), MPa 140 to 290
190 to 310
Tensile Strength: Yield (Proof), MPa 94 to 200
100 to 280

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
410
Melting Completion (Liquidus), °C 1380 to 1390
650
Melting Onset (Solidus), °C 1340 to 1350
610
Specific Heat Capacity, J/kg-K 490
900
Thermal Conductivity, W/m-K 41 to 43
180 to 200
Thermal Expansion, µm/m-K 12 to 14
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
54
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
180

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
9.5
Density, g/cm3 7.5 to 7.6
2.7
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
8.3
Embodied Energy, MJ/kg 21 to 24
150
Embodied Water, L/kg 44 to 51
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
27 to 36
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
77 to 550
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 5.2 to 11
20 to 32
Strength to Weight: Bending, points 8.0 to 13
28 to 38
Thermal Diffusivity, mm2/s 11 to 12
74 to 83
Thermal Shock Resistance, points 4.2 to 8.6
8.6 to 14