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7022 Aluminum vs. S30530 Stainless Steel

7022 aluminum belongs to the aluminum alloys classification, while S30530 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 S30530 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 6.3 to 8.0
46
Fatigue Strength, MPa 140 to 170
210
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 290 to 320
410
Tensile Strength: Ultimate (UTS), MPa 490 to 540
590
Tensile Strength: Yield (Proof), MPa 390 to 460
230

Thermal Properties

Latent Heat of Fusion, J/g 380
310
Maximum Temperature: Mechanical, °C 200
970
Melting Completion (Liquidus), °C 640
1410
Melting Onset (Solidus), °C 480
1370
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140
15
Thermal Expansion, µm/m-K 24
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 65
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
18
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.5
3.4
Embodied Energy, MJ/kg 150
48
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
210
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 47 to 51
21
Strength to Weight: Bending, points 47 to 50
20
Thermal Diffusivity, mm2/s 54
4.1
Thermal Shock Resistance, points 21 to 23
13

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.1 to 0.3
17 to 20.5
Copper (Cu), % 0.5 to 1.0
0.75 to 3.5
Iron (Fe), % 0 to 0.5
58.4 to 72.5
Magnesium (Mg), % 2.6 to 3.7
0
Manganese (Mn), % 0.1 to 0.4
0 to 2.0
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
8.5 to 11.5
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.5
0.5 to 2.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 4.3 to 5.2
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0