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8021 Aluminum vs. ACI-ASTM CG6MMN Steel

8021 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CG6MMN steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 8021 aluminum and the bottom bar is ACI-ASTM CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 2.3
34
Fatigue Strength, MPa 61
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
79
Tensile Strength: Ultimate (UTS), MPa 160
670
Tensile Strength: Yield (Proof), MPa 130
320

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 170
1080
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 640
1380
Specific Heat Capacity, J/kg-K 900
480
Thermal Expansion, µm/m-K 23
17

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
22
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.1
4.8
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1180
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.4
190
Resilience: Unit (Modulus of Resilience), kJ/m3 130
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 16
24
Strength to Weight: Bending, points 23
22
Thermal Shock Resistance, points 7.0
14

Alloy Composition

Aluminum (Al), % 98 to 98.8
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
20.5 to 23.5
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 1.2 to 1.7
51.9 to 62.1
Manganese (Mn), % 0
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3
Residuals, % 0 to 0.15
0