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2017A Aluminum vs. S32950 Stainless Steel

2017A aluminum belongs to the aluminum alloys classification, while S32950 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 S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 2.2 to 14
17
Fatigue Strength, MPa 92 to 130
330
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
80
Shear Strength, MPa 120 to 270
480
Tensile Strength: Ultimate (UTS), MPa 200 to 460
780
Tensile Strength: Yield (Proof), MPa 110 to 290
550

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 220
1100
Melting Completion (Liquidus), °C 650
1430
Melting Onset (Solidus), °C 510
1390
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
16
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
17
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
3.4
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1140
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.7 to 53
120
Resilience: Unit (Modulus of Resilience), kJ/m3 90 to 570
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 19 to 42
28
Strength to Weight: Bending, points 26 to 44
24
Thermal Diffusivity, mm2/s 56
4.3
Thermal Shock Resistance, points 8.9 to 20
21

Alloy Composition

Aluminum (Al), % 91.3 to 95.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
26 to 29
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 0.7
60.3 to 69.4
Magnesium (Mg), % 0.4 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
1.0 to 2.5
Nickel (Ni), % 0
3.5 to 5.2
Nitrogen (N), % 0
0.15 to 0.35
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.2 to 0.8
0 to 0.6
Sulfur (S), % 0
0 to 0.010
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