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206.0 Aluminum vs. SAE-AISI 1021 Steel

206.0 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 (3, 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 206.0 aluminum and the bottom bar is SAE-AISI 1021 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 95 to 110
130 to 150
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 8.4 to 12
17 to 27
Fatigue Strength, MPa 88 to 210
190 to 300
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 260
310 to 320
Tensile Strength: Ultimate (UTS), MPa 330 to 440
480 to 530
Tensile Strength: Yield (Proof), MPa 190 to 350
260 to 450

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 120
52
Thermal Expansion, µm/m-K 19
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.8
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 49
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 840
180 to 530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 30 to 40
17 to 19
Strength to Weight: Bending, points 35 to 42
17 to 18
Thermal Diffusivity, mm2/s 46
14
Thermal Shock Resistance, points 17 to 23
15 to 17

Alloy Composition

Aluminum (Al), % 93.3 to 95.3
0
Carbon (C), % 0
0.18 to 0.23
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.15
98.8 to 99.22
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0.2 to 0.5
0.6 to 0.9
Nickel (Ni), % 0 to 0.050
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0