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1070A Aluminum vs. SAE-AISI 1021 Steel

1070A aluminum belongs to the aluminum alloys classification, while SAE-AISI 1021 steel belongs to the iron alloys. There are 31 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 1070A aluminum and the bottom bar is SAE-AISI 1021 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 18 to 40
130 to 150
Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 2.3 to 33
17 to 27
Fatigue Strength, MPa 17 to 51
190 to 300
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 44 to 81
310 to 320
Tensile Strength: Ultimate (UTS), MPa 68 to 140
480 to 530
Tensile Strength: Yield (Proof), MPa 17 to 120
260 to 450

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 640
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 230
52
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 200
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.2
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1200
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.0 to 18
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 100
180 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 7.0 to 14
17 to 19
Strength to Weight: Bending, points 14 to 22
17 to 18
Thermal Diffusivity, mm2/s 94
14
Thermal Shock Resistance, points 3.1 to 6.3
15 to 17

Alloy Composition

Aluminum (Al), % 99.7 to 100
0
Carbon (C), % 0
0.18 to 0.23
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.25
98.8 to 99.22
Magnesium (Mg), % 0 to 0.030
0
Manganese (Mn), % 0 to 0.030
0.6 to 0.9
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 0 to 0.070
0