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2117 Aluminum vs. EN 1.4658 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4658 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 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
260
Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 26
28
Fatigue Strength, MPa 95
530
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
81
Shear Strength, MPa 200
580
Tensile Strength: Ultimate (UTS), MPa 300
900
Tensile Strength: Yield (Proof), MPa 170
730

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 220
1100
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
16
Thermal Expansion, µm/m-K 24
13

Otherwise Unclassified Properties

Base Metal Price, % relative 10
25
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.2
4.5
Embodied Energy, MJ/kg 150
61
Embodied Water, L/kg 1150
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
240
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 28
32
Strength to Weight: Bending, points 33
26
Thermal Diffusivity, mm2/s 59
4.3
Thermal Shock Resistance, points 12
24

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 2.2 to 4.5
0 to 1.0
Iron (Fe), % 0 to 0.7
50.9 to 63.7
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
5.5 to 9.5
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.2 to 0.8
0 to 0.5
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