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2117 Aluminum vs. N08028 Stainless Steel

2117 aluminum belongs to the aluminum alloys classification, while N08028 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 N08028 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
180
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 26
45
Fatigue Strength, MPa 95
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
80
Shear Strength, MPa 200
400
Tensile Strength: Ultimate (UTS), MPa 300
570
Tensile Strength: Yield (Proof), MPa 170
240

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Maximum Temperature: Mechanical, °C 220
1100
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 550
1370
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
12
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
8.1
Embodied Carbon, kg CO2/kg material 8.2
6.4
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 1150
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
210
Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 33
19
Thermal Diffusivity, mm2/s 59
3.2
Thermal Shock Resistance, points 12
12

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
26 to 28
Copper (Cu), % 2.2 to 4.5
0.6 to 1.4
Iron (Fe), % 0 to 0.7
29 to 40.4
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 2.5
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
30 to 34
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.2 to 0.8
0 to 1.0
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