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S32001 Stainless Steel vs. A242.0 Aluminum

S32001 stainless steel belongs to the iron alloys classification, while A242.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, 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 S32001 stainless steel and the bottom bar is A242.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 28
1.6
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 690
220

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 970
210
Melting Completion (Liquidus), °C 1420
680
Melting Onset (Solidus), °C 1370
550
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 7.7
3.1
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 37
150
Embodied Water, L/kg 150
1130

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 25
20
Strength to Weight: Bending, points 23
26
Thermal Diffusivity, mm2/s 4.0
52
Thermal Shock Resistance, points 19
9.3

Alloy Composition

Aluminum (Al), % 0
89.3 to 93.1
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19.5 to 21.5
0.15 to 0.25
Copper (Cu), % 0 to 1.0
3.7 to 4.5
Iron (Fe), % 66.6 to 75.5
0 to 0.8
Magnesium (Mg), % 0
1.2 to 1.7
Manganese (Mn), % 4.0 to 6.0
0 to 0.1
Molybdenum (Mo), % 0 to 0.6
0
Nickel (Ni), % 1.0 to 3.0
1.8 to 2.3
Nitrogen (N), % 0.050 to 0.17
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.070 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15