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S32003 Stainless Steel vs. 6066 Aluminum

S32003 stainless steel belongs to the iron alloys classification, while 6066 aluminum belongs to the aluminum 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 S32003 stainless steel and the bottom bar is 6066 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 28
7.8 to 17
Fatigue Strength, MPa 370
94 to 130
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 480
95 to 240
Tensile Strength: Ultimate (UTS), MPa 730
160 to 400
Tensile Strength: Yield (Proof), MPa 510
93 to 360

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
170
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1400
560
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
130

Otherwise Unclassified Properties

Base Metal Price, % relative 14
9.5
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 3.0
8.3
Embodied Energy, MJ/kg 42
150
Embodied Water, L/kg 150
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
23 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 660
61 to 920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 26
16 to 39
Strength to Weight: Bending, points 23
23 to 43
Thermal Diffusivity, mm2/s 4.0
61
Thermal Shock Resistance, points 21
6.9 to 17

Alloy Composition

Aluminum (Al), % 0
93 to 97
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 22.5
0 to 0.4
Copper (Cu), % 0
0.7 to 1.2
Iron (Fe), % 68.2 to 75.9
0 to 0.5
Magnesium (Mg), % 0
0.8 to 1.4
Manganese (Mn), % 0 to 2.0
0.6 to 1.1
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 3.0 to 4.0
0
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0.9 to 1.8
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15