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SAE-AISI H25 Steel vs. 7108A Aluminum

SAE-AISI H25 steel belongs to the iron alloys classification, while 7108A aluminum belongs to the aluminum 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 SAE-AISI H25 steel and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
350

Thermal Properties

Latent Heat of Fusion, J/g 250
380
Melting Completion (Liquidus), °C 1750
630
Melting Onset (Solidus), °C 1700
520
Specific Heat Capacity, J/kg-K 420
870
Thermal Conductivity, W/m-K 26
150
Thermal Expansion, µm/m-K 12
24

Otherwise Unclassified Properties

Base Metal Price, % relative 38
10
Density, g/cm3 9.1
2.9
Embodied Carbon, kg CO2/kg material 6.2
8.3
Embodied Energy, MJ/kg 93
150
Embodied Water, L/kg 83
1150

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
47
Strength to Weight: Axial, points 22 to 50
33 to 34
Strength to Weight: Bending, points 20 to 34
38
Thermal Diffusivity, mm2/s 6.7
59
Thermal Shock Resistance, points 22 to 49
15 to 16

Alloy Composition

Aluminum (Al), % 0
91.6 to 94.4
Carbon (C), % 0.22 to 0.32
0
Chromium (Cr), % 3.8 to 4.5
0 to 0.040
Copper (Cu), % 0 to 0.25
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 77.2 to 81.3
0 to 0.3
Magnesium (Mg), % 0
0.7 to 1.5
Manganese (Mn), % 0.15 to 0.4
0 to 0.050
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.4
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.030
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0
Zinc (Zn), % 0
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15