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EN AC-51500 Aluminum vs. SAE-AISI H23 Steel

EN AC-51500 aluminum belongs to the aluminum alloys classification, while SAE-AISI H23 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 EN AC-51500 aluminum and the bottom bar is SAE-AISI H23 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
80
Tensile Strength: Ultimate (UTS), MPa 280
760 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 430
260
Melting Completion (Liquidus), °C 630
1680
Melting Onset (Solidus), °C 590
1630
Specific Heat Capacity, J/kg-K 910
440
Thermal Conductivity, W/m-K 120
20
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
34
Density, g/cm3 2.6
8.7
Embodied Carbon, kg CO2/kg material 9.0
6.9
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1150
120

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 52
22
Strength to Weight: Axial, points 29
24 to 49
Strength to Weight: Bending, points 36
21 to 34
Thermal Diffusivity, mm2/s 49
5.2
Thermal Shock Resistance, points 13
23 to 47

Alloy Composition

Aluminum (Al), % 89.8 to 93.1
0
Carbon (C), % 0
0.25 to 0.35
Chromium (Cr), % 0
11 to 12.8
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0 to 0.25
71.3 to 76.7
Magnesium (Mg), % 4.7 to 6.0
0
Manganese (Mn), % 0.4 to 0.8
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 1.8 to 2.6
0.15 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
11 to 12.8
Vanadium (V), % 0
0.75 to 1.3
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.15
0