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SAE-AISI A9 Steel vs. EN AC-42200 Aluminum

SAE-AISI A9 steel belongs to the iron alloys classification, while EN AC-42200 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 A9 steel and the bottom bar is EN AC-42200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 74
26
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
320

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Melting Completion (Liquidus), °C 1460
610
Melting Onset (Solidus), °C 1410
600
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 35
150
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
40
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
140

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 4.7
8.0
Embodied Energy, MJ/kg 70
150
Embodied Water, L/kg 82
1110

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 28 to 73
34 to 35
Strength to Weight: Bending, points 24 to 46
40 to 41
Thermal Diffusivity, mm2/s 9.6
66
Thermal Shock Resistance, points 25 to 66
15

Alloy Composition


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Aluminum (Al), % 0
91 to 93.1
Carbon (C), % 0.45 to 0.55
0
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
0 to 0.050
Iron (Fe), % 87 to 90.5
0 to 0.19
Magnesium (Mg), % 0
0.45 to 0.7
Manganese (Mn), % 0 to 0.5
0 to 0.1
Molybdenum (Mo), % 1.3 to 1.8
0
Nickel (Ni), % 1.3 to 1.8
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 1.0 to 1.2
6.5 to 7.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0.8 to 1.4
0
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1