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2117 Aluminum vs. SAE-AISI T1 Steel

2117 aluminum belongs to the aluminum alloys classification, while SAE-AISI T1 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 T1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 300
770 to 2130

Thermal Properties

Latent Heat of Fusion, J/g 400
240
Melting Completion (Liquidus), °C 650
1810
Melting Onset (Solidus), °C 550
1750
Specific Heat Capacity, J/kg-K 880
410
Thermal Conductivity, W/m-K 150
20
Thermal Expansion, µm/m-K 24
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
45
Density, g/cm3 3.0
9.3
Embodied Carbon, kg CO2/kg material 8.2
8.2
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1150
90

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 47
21
Strength to Weight: Axial, points 28
23 to 64
Strength to Weight: Bending, points 33
20 to 40
Thermal Diffusivity, mm2/s 59
5.2
Thermal Shock Resistance, points 12
23 to 64

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0.65 to 0.8
Chromium (Cr), % 0 to 0.1
3.8 to 4.5
Copper (Cu), % 2.2 to 4.5
0 to 0.25
Iron (Fe), % 0 to 0.7
73.2 to 77.2
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0.1 to 0.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
17.3 to 18.8
Vanadium (V), % 0
0.9 to 1.3
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0