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2117 Aluminum vs. EN 1.4107 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4107 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 EN 1.4107 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 26
18 to 21
Fatigue Strength, MPa 95
260 to 350
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 300
620 to 700
Tensile Strength: Yield (Proof), MPa 170
400 to 570

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 220
740
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
27
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.2
2.1
Embodied Energy, MJ/kg 150
30
Embodied Water, L/kg 1150
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
420 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 28
22 to 25
Strength to Weight: Bending, points 33
21 to 22
Thermal Diffusivity, mm2/s 59
7.2
Thermal Shock Resistance, points 12
22 to 25

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.1
11.5 to 12.5
Copper (Cu), % 2.2 to 4.5
0 to 0.3
Iron (Fe), % 0 to 0.7
83.8 to 87.2
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0.8 to 1.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.25
0
Vanadium (V), % 0
0 to 0.080
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0