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2117 Aluminum vs. ACI-ASTM CG6MMN Steel

2117 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CG6MMN steel belongs to the iron alloys. There are 26 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 2117 aluminum and the bottom bar is ACI-ASTM CG6MMN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
190
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
34
Fatigue Strength, MPa 95
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 300
670
Tensile Strength: Yield (Proof), MPa 170
320

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 220
1080
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Expansion, µm/m-K 24
17

Otherwise Unclassified Properties

Base Metal Price, % relative 10
22
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.2
4.8
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
190
Resilience: Unit (Modulus of Resilience), kJ/m3 190
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 28
24
Strength to Weight: Bending, points 33
22
Thermal Shock Resistance, points 12
14

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0 to 0.1
20.5 to 23.5
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
51.9 to 62.1
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
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), % 0.2 to 0.8
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Vanadium (V), % 0
0.1 to 0.3
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0