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238.0 Aluminum vs. SAE-AISI H23 Steel

238.0 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 (9, 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 238.0 aluminum and the bottom bar is SAE-AISI H23 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
200
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
80
Tensile Strength: Ultimate (UTS), MPa 210
760 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 430
260
Melting Completion (Liquidus), °C 600
1680
Melting Onset (Solidus), °C 510
1630
Specific Heat Capacity, J/kg-K 840
440
Thermal Conductivity, W/m-K 100
20
Thermal Expansion, µm/m-K 21
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
34
Density, g/cm3 3.4
8.7
Embodied Carbon, kg CO2/kg material 7.4
6.9
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 1040
120

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
22
Strength to Weight: Axial, points 17
24 to 49
Strength to Weight: Bending, points 23
21 to 34
Thermal Diffusivity, mm2/s 37
5.2
Thermal Shock Resistance, points 9.1
23 to 47

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0.25 to 0.35
Chromium (Cr), % 0
11 to 12.8
Copper (Cu), % 9.5 to 10.5
0 to 0.25
Iron (Fe), % 1.0 to 1.5
71.3 to 76.7
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 3.6 to 4.4
0.15 to 0.6
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
11 to 12.8
Vanadium (V), % 0
0.75 to 1.3
Zinc (Zn), % 1.0 to 1.5
0