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7075 Aluminum vs. EN 1.6579 Steel

7075 aluminum belongs to the aluminum alloys classification, while EN 1.6579 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 1.6579 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 1.8 to 12
11 to 14
Fatigue Strength, MPa 110 to 190
380 to 570
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 240 to 590
850 to 980
Tensile Strength: Yield (Proof), MPa 120 to 510
600 to 910

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 200
440
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 130
39
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 98
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.7
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.7
Embodied Energy, MJ/kg 150
22
Embodied Water, L/kg 1120
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
950 to 2210
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 22 to 54
30 to 35
Strength to Weight: Bending, points 28 to 52
25 to 28
Thermal Diffusivity, mm2/s 50
11
Thermal Shock Resistance, points 10 to 25
25 to 29

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0
Carbon (C), % 0
0.32 to 0.38
Chromium (Cr), % 0.18 to 0.28
1.4 to 1.7
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.5
94.2 to 96.1
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.3
0.6 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.35
Nickel (Ni), % 0
1.4 to 1.7
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.6
Sulfur (S), % 0
0 to 0.030
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

Comparable Variants