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7022 Aluminum vs. EN 1.4945 Stainless Steel

7022 aluminum belongs to the aluminum alloys classification, while EN 1.4945 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 7022 aluminum and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 6.3 to 8.0
19 to 34
Fatigue Strength, MPa 140 to 170
230 to 350
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 290 to 320
430 to 460
Tensile Strength: Ultimate (UTS), MPa 490 to 540
640 to 740
Tensile Strength: Yield (Proof), MPa 390 to 460
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 200
920
Melting Completion (Liquidus), °C 640
1490
Melting Onset (Solidus), °C 480
1440
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
14
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 65
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
30
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 8.5
5.0
Embodied Energy, MJ/kg 150
73
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 47 to 51
22 to 25
Strength to Weight: Bending, points 47 to 50
20 to 22
Thermal Diffusivity, mm2/s 54
3.7
Thermal Shock Resistance, points 21 to 23
14 to 16

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0.1 to 0.3
15.5 to 17.5
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 0 to 0.5
57.9 to 65.7
Magnesium (Mg), % 2.6 to 3.7
0
Manganese (Mn), % 0.1 to 0.4
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.5
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
2.5 to 3.5
Zinc (Zn), % 4.3 to 5.2
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0