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7020 Aluminum vs. SAE-AISI 1005 Steel

7020 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1005 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 SAE-AISI 1005 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
95
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 8.4 to 14
23
Fatigue Strength, MPa 110 to 130
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 110 to 230
210
Tensile Strength: Ultimate (UTS), MPa 190 to 390
330
Tensile Strength: Yield (Proof), MPa 120 to 310
260

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 650
1470
Melting Onset (Solidus), °C 610
1430
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
53
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.9

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
70
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18 to 37
12
Strength to Weight: Bending, points 25 to 41
13
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 8.3 to 17
10

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.4
99.5 to 100
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0 to 0.35
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.35
0
Sulfur (S), % 0
0 to 0.050
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 to 0.15
0