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SAE-AISI A9 Steel vs. 6070 Aluminum

SAE-AISI A9 steel belongs to the iron alloys classification, while 6070 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 6070 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
370 to 380

Thermal Properties

Latent Heat of Fusion, J/g 280
410
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 35
160
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
41
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
2.7
Embodied Carbon, kg CO2/kg material 4.7
8.3
Embodied Energy, MJ/kg 70
150
Embodied Water, L/kg 82
1170

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 28 to 73
38
Strength to Weight: Bending, points 24 to 46
42 to 43
Thermal Diffusivity, mm2/s 9.6
65
Thermal Shock Resistance, points 25 to 66
16 to 17

Alloy Composition


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Aluminum (Al), % 0
94.6 to 98
Carbon (C), % 0.45 to 0.55
0
Chromium (Cr), % 4.8 to 5.5
0 to 0.1
Copper (Cu), % 0 to 0.25
0.15 to 0.4
Iron (Fe), % 87 to 90.5
0 to 0.5
Magnesium (Mg), % 0
0.5 to 1.2
Manganese (Mn), % 0 to 0.5
0.4 to 1.0
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
1.0 to 1.7
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0.8 to 1.4
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15