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7022 Aluminum vs. ASTM A204 Steel

7022 aluminum belongs to the aluminum alloys classification, while ASTM A204 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.3 to 8.0
18 to 22
Fatigue Strength, MPa 140 to 170
200 to 220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 290 to 320
330 to 360
Tensile Strength: Ultimate (UTS), MPa 490 to 540
520 to 590
Tensile Strength: Yield (Proof), MPa 390 to 460
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 200
410
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 480
1420 to 1430
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
52
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 65
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.5
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1130
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
220 to 290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 47 to 51
18 to 21
Strength to Weight: Bending, points 47 to 50
18 to 20
Thermal Diffusivity, mm2/s 54
14
Thermal Shock Resistance, points 21 to 23
15 to 17