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2017A Aluminum vs. S32304 Stainless Steel

2017A aluminum belongs to the aluminum alloys classification, while S32304 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 S32304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 2.2 to 14
28
Fatigue Strength, MPa 92 to 130
330
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
79
Shear Strength, MPa 120 to 270
440
Tensile Strength: Ultimate (UTS), MPa 200 to 460
670
Tensile Strength: Yield (Proof), MPa 110 to 290
460

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 220
1050
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 510
1380
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
14
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1140
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.7 to 53
170
Resilience: Unit (Modulus of Resilience), kJ/m3 90 to 570
520
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 19 to 42
24
Strength to Weight: Bending, points 26 to 44
22
Thermal Diffusivity, mm2/s 56
4.0
Thermal Shock Resistance, points 8.9 to 20
18

Alloy Composition

Aluminum (Al), % 91.3 to 95.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
21.5 to 24.5
Copper (Cu), % 3.5 to 4.5
0.050 to 0.6
Iron (Fe), % 0 to 0.7
65 to 75.4
Magnesium (Mg), % 0.4 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0 to 2.5
Molybdenum (Mo), % 0
0.050 to 0.6
Nickel (Ni), % 0
3.0 to 5.5
Nitrogen (N), % 0
0.050 to 0.2
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