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2117 Aluminum vs. EN 1.4547 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4547 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.4547 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
230
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
39
Fatigue Strength, MPa 95
290
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
80
Shear Strength, MPa 200
510
Tensile Strength: Ultimate (UTS), MPa 300
750
Tensile Strength: Yield (Proof), MPa 170
340

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 220
1090
Melting Completion (Liquidus), °C 650
1470
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 150
14
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
28
Density, g/cm3 3.0
8.0
Embodied Carbon, kg CO2/kg material 8.2
5.6
Embodied Energy, MJ/kg 150
75
Embodied Water, L/kg 1150
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
240
Resilience: Unit (Modulus of Resilience), kJ/m3 190
290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 28
26
Strength to Weight: Bending, points 33
23
Thermal Diffusivity, mm2/s 59
3.8
Thermal Shock Resistance, points 12
16

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0 to 0.1
19.5 to 20.5
Copper (Cu), % 2.2 to 4.5
0.5 to 1.0
Iron (Fe), % 0 to 0.7
51 to 56.3
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0 to 0.7
Sulfur (S), % 0
0 to 0.010
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