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SAE-AISI L2 Steel vs. A242.0 Aluminum

SAE-AISI L2 steel belongs to the iron alloys classification, while A242.0 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (3, 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 L2 steel and the bottom bar is A242.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
73
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
27
Tensile Strength: Ultimate (UTS), MPa 590 to 1960
220

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Melting Completion (Liquidus), °C 1450
680
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 44
140
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
37
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
12
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 1.9
8.3
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 51
1130

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 21 to 70
20
Strength to Weight: Bending, points 20 to 45
26
Thermal Diffusivity, mm2/s 12
52
Thermal Shock Resistance, points 19 to 65
9.3

Alloy Composition

Aluminum (Al), % 0
89.3 to 93.1
Carbon (C), % 0.45 to 1.0
0
Chromium (Cr), % 0.7 to 1.2
0.15 to 0.25
Copper (Cu), % 0 to 0.25
3.7 to 4.5
Iron (Fe), % 95.5 to 98.7
0 to 0.8
Magnesium (Mg), % 0
1.2 to 1.7
Manganese (Mn), % 0.1 to 0.9
0 to 0.1
Molybdenum (Mo), % 0 to 0.25
0
Nickel (Ni), % 0
1.8 to 2.3
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.070 to 0.2
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15