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7020 Aluminum vs. AWS ER90S-B3

7020 aluminum belongs to the aluminum alloys classification, while AWS ER90S-B3 belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 7020 aluminum and the bottom bar is AWS ER90S-B3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 8.4 to 14
19
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 190 to 390
690
Tensile Strength: Yield (Proof), MPa 120 to 310
620

Thermal Properties

Latent Heat of Fusion, J/g 380
260
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 610
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
40
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.1
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.8
Embodied Energy, MJ/kg 150
24
Embodied Water, L/kg 1150
60

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
130
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
1000
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18 to 37
25
Strength to Weight: Bending, points 25 to 41
22
Thermal Diffusivity, mm2/s 59
11
Thermal Shock Resistance, points 8.3 to 17
20

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Carbon (C), % 0
0.070 to 0.12
Chromium (Cr), % 0.1 to 0.35
2.3 to 2.7
Copper (Cu), % 0 to 0.2
0 to 0.35
Iron (Fe), % 0 to 0.4
93.5 to 95.9
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0.4 to 0.7
Molybdenum (Mo), % 0
0.9 to 1.2
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.35
0.4 to 0.7
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.5