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238.0 Aluminum vs. SAE-AISI A3 Steel

238.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI A3 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, 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 A3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
73
Tensile Strength: Ultimate (UTS), MPa 210
700 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 430
260
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 510
1410
Specific Heat Capacity, J/kg-K 840
470
Thermal Conductivity, W/m-K 100
37
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 67
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
6.0
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
4.4
Embodied Energy, MJ/kg 140
67
Embodied Water, L/kg 1040
78

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
25 to 77
Strength to Weight: Bending, points 23
23 to 48
Thermal Diffusivity, mm2/s 37
10
Thermal Shock Resistance, points 9.1
23 to 70

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
1.2 to 1.3
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 9.5 to 10.5
0 to 0.25
Iron (Fe), % 1.0 to 1.5
88.7 to 92
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0.4 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 3.6 to 4.4
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.8 to 1.4
Zinc (Zn), % 1.0 to 1.5
0