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7022 Aluminum vs. ASTM A372 Grade J Steel

7022 aluminum belongs to the aluminum alloys classification, while ASTM A372 grade J 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 A372 grade J steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.3 to 8.0
17 to 22
Fatigue Strength, MPa 140 to 170
310 to 570
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 290 to 320
410 to 630
Tensile Strength: Ultimate (UTS), MPa 490 to 540
650 to 1020
Tensile Strength: Yield (Proof), MPa 390 to 460
430 to 850

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 200
420
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
44
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 65
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.5
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1130
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
500 to 1930
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 47 to 51
23 to 36
Strength to Weight: Bending, points 47 to 50
21 to 29
Thermal Diffusivity, mm2/s 54
12
Thermal Shock Resistance, points 21 to 23
19 to 30

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
0
Carbon (C), % 0
0.35 to 0.5
Chromium (Cr), % 0.1 to 0.3
0.8 to 1.2
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 0 to 0.5
96.7 to 97.8
Magnesium (Mg), % 2.6 to 3.7
0
Manganese (Mn), % 0.1 to 0.4
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
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

Comparable Variants