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EN 1.3956 Stainless Steel vs. 7050 Aluminum

EN 1.3956 stainless steel belongs to the iron alloys classification, while 7050 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 1.3956 stainless steel and the bottom bar is 7050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 27
2.2 to 12
Fatigue Strength, MPa 240
130 to 210
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 650
490 to 570
Tensile Strength: Yield (Proof), MPa 330
390 to 500

Thermal Properties

Latent Heat of Fusion, J/g 300
370
Maximum Temperature: Mechanical, °C 1080
190
Melting Completion (Liquidus), °C 1420
630
Melting Onset (Solidus), °C 1380
490
Specific Heat Capacity, J/kg-K 480
860
Thermal Expansion, µm/m-K 13
24

Otherwise Unclassified Properties

Base Metal Price, % relative 22
10
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 4.8
8.2
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
10 to 55
Resilience: Unit (Modulus of Resilience), kJ/m3 270
1110 to 1760
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 23
45 to 51
Strength to Weight: Bending, points 21
45 to 50
Thermal Shock Resistance, points 18
21 to 25

Alloy Composition

Aluminum (Al), % 0
87.3 to 92.1
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0 to 0.040
Copper (Cu), % 0
2.0 to 2.6
Iron (Fe), % 51.9 to 62.1
0 to 0.15
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 4.0 to 6.0
0 to 0.1
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.12
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
5.7 to 6.7
Zirconium (Zr), % 0
0.080 to 0.15
Residuals, % 0
0 to 0.15