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7475 Aluminum vs. Austenitic Grey Cast Iron

7475 aluminum belongs to the aluminum alloys classification, while austenitic grey cast iron belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, 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 7475 aluminum and the bottom bar is austenitic grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
180
Poisson's Ratio 0.32
0.29 to 0.3
Shear Modulus, GPa 26
69 to 72
Tensile Strength: Ultimate (UTS), MPa 530 to 590
150 to 230

Thermal Properties

Latent Heat of Fusion, J/g 380
280 to 350
Melting Completion (Liquidus), °C 640
1340 to 1400
Melting Onset (Solidus), °C 480
1290 to 1350
Specific Heat Capacity, J/kg-K 870
470 to 490
Thermal Expansion, µm/m-K 23
13 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14 to 24
Density, g/cm3 3.0
7.7 to 8.1
Embodied Carbon, kg CO2/kg material 8.2
3.1 to 4.7
Embodied Energy, MJ/kg 150
43 to 65
Embodied Water, L/kg 1130
93 to 120

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
23 to 25
Strength to Weight: Axial, points 49 to 55
5.3 to 8.2
Strength to Weight: Bending, points 48 to 52
7.9 to 11
Thermal Shock Resistance, points 23 to 26
4.5 to 6.5