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2117 Aluminum vs. SAE-AISI 1140 Steel

2117 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1140 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 2117 aluminum and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 26
14 to 18
Fatigue Strength, MPa 95
230 to 370
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Shear Strength, MPa 200
370 to 420
Tensile Strength: Ultimate (UTS), MPa 300
600 to 700
Tensile Strength: Yield (Proof), MPa 170
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 220
400
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
51
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 10
1.8
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 190
310 to 870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 28
21 to 25
Strength to Weight: Bending, points 33
20 to 22
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 12
18 to 21

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0.37 to 0.44
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
98.4 to 98.9
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0.7 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0
Sulfur (S), % 0
0.080 to 0.13
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0