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7175 Aluminum vs. SAE-AISI H24 Steel

7175 aluminum belongs to the aluminum alloys classification, while SAE-AISI H24 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 7175 aluminum and the bottom bar is SAE-AISI H24 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 520 to 570
720 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 380
240
Melting Completion (Liquidus), °C 640
1750
Melting Onset (Solidus), °C 480
1700
Specific Heat Capacity, J/kg-K 870
420
Thermal Conductivity, W/m-K 140
27
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
9.1
Embodied Carbon, kg CO2/kg material 8.2
6.1
Embodied Energy, MJ/kg 150
93
Embodied Water, L/kg 1130
78

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 46
22
Strength to Weight: Axial, points 48 to 52
22 to 61
Strength to Weight: Bending, points 48 to 51
20 to 39
Thermal Diffusivity, mm2/s 53
6.9
Thermal Shock Resistance, points 23 to 25
22 to 61

Alloy Composition

Aluminum (Al), % 88 to 91.4
0
Carbon (C), % 0
0.42 to 0.53
Chromium (Cr), % 0.18 to 0.28
2.5 to 3.5
Copper (Cu), % 1.2 to 2.0
0 to 0.25
Iron (Fe), % 0 to 0.2
78 to 82.4
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.15
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0
0.4 to 0.6
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0