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S31277 Stainless Steel vs. 2030 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while 2030 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, 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 2030 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 45
5.6 to 8.0
Fatigue Strength, MPa 380
91 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 600
220 to 250
Tensile Strength: Ultimate (UTS), MPa 860
370 to 420
Tensile Strength: Yield (Proof), MPa 410
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 310
390
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
510
Specific Heat Capacity, J/kg-K 460
870
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 36
10
Density, g/cm3 8.1
3.1
Embodied Carbon, kg CO2/kg material 6.7
8.0
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 410
390 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 29
33 to 38
Strength to Weight: Bending, points 25
37 to 40
Thermal Shock Resistance, points 19
16 to 19

Alloy Composition


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Aluminum (Al), % 0
88.9 to 95.2
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0 to 0.1
Copper (Cu), % 0.5 to 1.5
3.3 to 4.5
Iron (Fe), % 35.5 to 46.2
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.5 to 1.3
Manganese (Mn), % 0 to 3.0
0.2 to 1.0
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 0.8
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.3