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7022 Aluminum vs. EN 1.4959 Stainless Steel

7022 aluminum belongs to the aluminum alloys classification, while EN 1.4959 stainless 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 7022 aluminum and the bottom bar is EN 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 6.3 to 8.0
40
Fatigue Strength, MPa 140 to 170
170
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 290 to 320
430
Tensile Strength: Ultimate (UTS), MPa 490 to 540
630
Tensile Strength: Yield (Proof), MPa 390 to 460
190

Thermal Properties

Latent Heat of Fusion, J/g 380
300
Maximum Temperature: Mechanical, °C 200
1090
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 480
1350
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140
12
Thermal Expansion, µm/m-K 24
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 65
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
31
Density, g/cm3 2.9
8.0
Embodied Carbon, kg CO2/kg material 8.5
5.4
Embodied Energy, MJ/kg 150
76
Embodied Water, L/kg 1130
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
96
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 47 to 51
22
Strength to Weight: Bending, points 47 to 50
20
Thermal Diffusivity, mm2/s 54
3.2
Thermal Shock Resistance, points 21 to 23
15

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
0.25 to 0.65
Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0.1 to 0.3
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0.5 to 1.0
0 to 0.5
Iron (Fe), % 0 to 0.5
39.4 to 50.5
Magnesium (Mg), % 2.6 to 3.7
0
Manganese (Mn), % 0.1 to 0.4
0 to 1.5
Nickel (Ni), % 0
30 to 34
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.2
0.25 to 0.65
Zinc (Zn), % 4.3 to 5.2
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0