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2117 Aluminum vs. EN 1.4855 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4855 stainless steel belongs to the iron alloys. There are 28 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 1.4855 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
150
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
4.6
Fatigue Strength, MPa 95
120
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 300
500
Tensile Strength: Yield (Proof), MPa 170
250

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Maximum Temperature: Mechanical, °C 220
1050
Melting Completion (Liquidus), °C 650
1400
Melting Onset (Solidus), °C 550
1350
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
14
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
34
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.2
5.9
Embodied Energy, MJ/kg 150
85
Embodied Water, L/kg 1150
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
19
Resilience: Unit (Modulus of Resilience), kJ/m3 190
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 28
18
Strength to Weight: Bending, points 33
18
Thermal Diffusivity, mm2/s 59
3.7
Thermal Shock Resistance, points 12
11

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0.3 to 0.5
Chromium (Cr), % 0 to 0.1
23 to 25
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
42.6 to 51.9
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
23 to 25
Niobium (Nb), % 0
0.8 to 1.8
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.8
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
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