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7020 Aluminum vs. ASTM A210 Steel

7020 aluminum belongs to the aluminum alloys classification, while ASTM A210 steel belongs to the iron alloys. 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 ASTM A210 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 8.4 to 14
34
Fatigue Strength, MPa 110 to 130
230 to 250
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 110 to 230
320 to 360
Tensile Strength: Ultimate (UTS), MPa 190 to 390
470 to 540
Tensile Strength: Yield (Proof), MPa 120 to 310
290 to 310

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 650
1460 to 1470
Melting Onset (Solidus), °C 610
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
52 to 53
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.0 to 8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
45 to 46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
230 to 250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18 to 37
17 to 19
Strength to Weight: Bending, points 25 to 41
17 to 19
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 8.3 to 17
15 to 17