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S31277 Stainless Steel vs. A201.0 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while A201.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 S31277 stainless steel and the bottom bar is A201.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 45
4.7
Fatigue Strength, MPa 380
97
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 860
480
Tensile Strength: Yield (Proof), MPa 410
420

Thermal Properties

Latent Heat of Fusion, J/g 310
390
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 460
880
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 36
11
Density, g/cm3 8.1
3.0
Embodied Carbon, kg CO2/kg material 6.7
8.1
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
22
Resilience: Unit (Modulus of Resilience), kJ/m3 410
1250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 29
44
Strength to Weight: Bending, points 25
45
Thermal Shock Resistance, points 19
21

Alloy Composition


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Aluminum (Al), % 0
93.7 to 95.5
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0
Copper (Cu), % 0.5 to 1.5
4.0 to 5.0
Iron (Fe), % 35.5 to 46.2
0 to 0.1
Magnesium (Mg), % 0
0.15 to 0.35
Manganese (Mn), % 0 to 3.0
0.2 to 0.4
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.050
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0.15 to 0.35
Residuals, % 0
0 to 0.1