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S31277 Stainless Steel vs. A444.0 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while A444.0 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 A444.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 45
18
Fatigue Strength, MPa 380
37
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 860
160
Tensile Strength: Yield (Proof), MPa 410
66

Thermal Properties

Latent Heat of Fusion, J/g 310
500
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1410
590
Specific Heat Capacity, J/kg-K 460
900
Thermal Expansion, µm/m-K 16
22

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.6
Embodied Carbon, kg CO2/kg material 6.7
7.9
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
24
Resilience: Unit (Modulus of Resilience), kJ/m3 410
31
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
53
Strength to Weight: Axial, points 29
17
Strength to Weight: Bending, points 25
25
Thermal Shock Resistance, points 19
7.3

Alloy Composition


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Aluminum (Al), % 0
91.6 to 93.5
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0
Copper (Cu), % 0.5 to 1.5
0 to 0.1
Iron (Fe), % 35.5 to 46.2
0 to 0.2
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 3.0
0 to 0.1
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
6.5 to 7.5
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15