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2017A Aluminum vs. S32101 Stainless Steel

2017A aluminum belongs to the aluminum alloys classification, while S32101 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 2017A aluminum and the bottom bar is S32101 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 2.2 to 14
34
Fatigue Strength, MPa 92 to 130
400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Shear Strength, MPa 120 to 270
490
Tensile Strength: Ultimate (UTS), MPa 200 to 460
740
Tensile Strength: Yield (Proof), MPa 110 to 290
500

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 220
1000
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 510
1370
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
38
Embodied Water, L/kg 1140
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.7 to 53
230
Resilience: Unit (Modulus of Resilience), kJ/m3 90 to 570
640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 19 to 42
27
Strength to Weight: Bending, points 26 to 44
24
Thermal Diffusivity, mm2/s 56
4.0
Thermal Shock Resistance, points 8.9 to 20
20

Alloy Composition

Aluminum (Al), % 91.3 to 95.5
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0 to 0.1
21 to 22
Copper (Cu), % 3.5 to 4.5
0.1 to 0.8
Iron (Fe), % 0 to 0.7
67.3 to 73.3
Magnesium (Mg), % 0.4 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
4.0 to 6.0
Molybdenum (Mo), % 0
0.1 to 0.8
Nickel (Ni), % 0
1.4 to 1.7
Nitrogen (N), % 0
0.2 to 0.25
Phosphorus (P), % 0
0 to 0.040
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