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2117 Aluminum vs. EN 1.4424 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.4424 stainless steel belongs to the iron 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 2117 aluminum and the bottom bar is EN 1.4424 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
230
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
28
Fatigue Strength, MPa 95
350 to 370
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Shear Strength, MPa 200
520
Tensile Strength: Ultimate (UTS), MPa 300
800
Tensile Strength: Yield (Proof), MPa 170
480 to 500

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Maximum Temperature: Mechanical, °C 220
960
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
13
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
15
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
3.4
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1150
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
190 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 190
580 to 640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 28
29
Strength to Weight: Bending, points 33
25
Thermal Diffusivity, mm2/s 59
3.5
Thermal Shock Resistance, points 12
23

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
18 to 19
Copper (Cu), % 2.2 to 4.5
0
Iron (Fe), % 0 to 0.7
68.6 to 72.4
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
1.2 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0
4.5 to 5.2
Nitrogen (N), % 0
0.050 to 0.1
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.2 to 0.8
1.4 to 2.0
Sulfur (S), % 0
0 to 0.015
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