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EN 1.4401 Stainless Steel vs. 2117 Aluminum

EN 1.4401 stainless steel belongs to the iron alloys classification, while 2117 aluminum belongs to the aluminum 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 EN 1.4401 stainless steel and the bottom bar is 2117 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
70
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 14 to 40
26
Fatigue Strength, MPa 200 to 320
95
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
27
Shear Strength, MPa 410 to 550
200
Tensile Strength: Ultimate (UTS), MPa 600 to 900
300
Tensile Strength: Yield (Proof), MPa 230 to 570
170

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 950
220
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 19
10
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 3.8
8.2
Embodied Energy, MJ/kg 52
150
Embodied Water, L/kg 150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
64
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 21 to 32
28
Strength to Weight: Bending, points 20 to 26
33
Thermal Diffusivity, mm2/s 4.0
59
Thermal Shock Resistance, points 13 to 20
12

Alloy Composition

Aluminum (Al), % 0
91 to 97.6
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 16.5 to 18.5
0 to 0.1
Copper (Cu), % 0
2.2 to 4.5
Iron (Fe), % 62.8 to 71.5
0 to 0.7
Magnesium (Mg), % 0
0.2 to 1.0
Manganese (Mn), % 0 to 2.0
0.4 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 13
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0.2 to 0.8
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15