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EN AC-71100 Aluminum vs. SAE-AISI A7 Steel

EN AC-71100 aluminum belongs to the aluminum alloys classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, 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 EN AC-71100 aluminum and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 260
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 490
260
Melting Completion (Liquidus), °C 580
1470
Melting Onset (Solidus), °C 520
1430
Specific Heat Capacity, J/kg-K 860
470
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.4
13
Embodied Energy, MJ/kg 140
200
Embodied Water, L/kg 1010
100

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 25
29 to 77
Strength to Weight: Bending, points 31
25 to 48
Thermal Shock Resistance, points 12
27 to 72

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
2.0 to 2.9
Chromium (Cr), % 0
5.0 to 5.8
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.3
81.4 to 87.7
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0 to 0.8
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 7.5 to 9.5
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0