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2117 Aluminum vs. EN 1.4877 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4877 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.4877 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
190
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
36
Fatigue Strength, MPa 95
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Shear Strength, MPa 200
420
Tensile Strength: Ultimate (UTS), MPa 300
630
Tensile Strength: Yield (Proof), MPa 170
200

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Maximum Temperature: Mechanical, °C 220
1150
Melting Completion (Liquidus), °C 650
1400
Melting Onset (Solidus), °C 550
1360
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
12
Thermal Expansion, µm/m-K 24
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
8.0
Embodied Carbon, kg CO2/kg material 8.2
6.2
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 1150
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 33
20
Thermal Diffusivity, mm2/s 59
3.2
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 91 to 97.6
0 to 0.025
Carbon (C), % 0
0.040 to 0.080
Cerium (Ce), % 0
0.050 to 0.1
Chromium (Cr), % 0 to 0.1
26 to 28
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
36.4 to 42.3
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 1.0
Nickel (Ni), % 0
31 to 33
Niobium (Nb), % 0
0.6 to 1.0
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.2 to 0.8
0 to 0.3
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