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7075 Aluminum vs. EN 1.0031 Steel

7075 aluminum belongs to the aluminum alloys classification, while EN 1.0031 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7075 aluminum and the bottom bar is EN 1.0031 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 1.8 to 12
28
Fatigue Strength, MPa 110 to 190
160
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 150 to 340
200
Tensile Strength: Ultimate (UTS), MPa 240 to 590
310
Tensile Strength: Yield (Proof), MPa 120 to 510
210

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 200
400
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 480
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 130
53
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 98
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
1.8
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1120
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
78
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 22 to 54
11
Strength to Weight: Bending, points 28 to 52
13
Thermal Diffusivity, mm2/s 50
14
Thermal Shock Resistance, points 10 to 25
9.8

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.5
98.8 to 100
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.3
0 to 0.7
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.35
Sulfur (S), % 0
0 to 0.045
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.1 to 6.1
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0