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2117 Aluminum vs. EN 1.4710 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4710 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, 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 1.4710 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
260
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 26
20
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
74

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 220
750
Melting Completion (Liquidus), °C 650
1430
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
24
Thermal Expansion, µm/m-K 24
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
6.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
5.0
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
1.8
Embodied Energy, MJ/kg 150
24
Embodied Water, L/kg 1150
76

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Thermal Diffusivity, mm2/s 59
6.5

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0 to 0.1
6.0 to 8.0
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
87.4 to 92.3
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0
0 to 0.15
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.035
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