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7075 Aluminum vs. EN 1.4911 Stainless Steel

7075 aluminum belongs to the aluminum alloys classification, while EN 1.4911 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.4911 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.8 to 12
11
Fatigue Strength, MPa 110 to 190
530
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 150 to 340
640
Tensile Strength: Ultimate (UTS), MPa 240 to 590
1070
Tensile Strength: Yield (Proof), MPa 120 to 510
970

Thermal Properties

Latent Heat of Fusion, J/g 380
270
Maximum Temperature: Mechanical, °C 200
700
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 480
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 130
20
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 98
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
20
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.3
3.4
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1120
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
120
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
2410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 22 to 54
38
Strength to Weight: Bending, points 28 to 52
30
Thermal Diffusivity, mm2/s 50
5.4
Thermal Shock Resistance, points 10 to 25
37

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0
Boron (B), % 0
0.0050 to 0.015
Carbon (C), % 0
0.050 to 0.12
Chromium (Cr), % 0.18 to 0.28
9.8 to 11.2
Cobalt (Co), % 0
5.0 to 7.0
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.5
75.7 to 83.8
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.3
0.3 to 1.3
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0
0.2 to 1.2
Niobium (Nb), % 0
0.2 to 0.5
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.4
0.1 to 0.8
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
0 to 0.7
Vanadium (V), % 0
0.1 to 0.4
Zinc (Zn), % 5.1 to 6.1
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0