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S31727 Stainless Steel vs. B390.0 Aluminum

S31727 stainless steel belongs to the iron alloys classification, while B390.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 S31727 stainless steel and the bottom bar is B390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
76
Elongation at Break, % 40
0.88
Fatigue Strength, MPa 240
170
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
29
Tensile Strength: Ultimate (UTS), MPa 630
320
Tensile Strength: Yield (Proof), MPa 270
250

Thermal Properties

Latent Heat of Fusion, J/g 290
640
Maximum Temperature: Mechanical, °C 1010
170
Melting Completion (Liquidus), °C 1440
580
Melting Onset (Solidus), °C 1390
580
Specific Heat Capacity, J/kg-K 470
880
Thermal Expansion, µm/m-K 16
20

Otherwise Unclassified Properties

Base Metal Price, % relative 24
11
Density, g/cm3 8.0
2.8
Embodied Carbon, kg CO2/kg material 4.7
7.3
Embodied Energy, MJ/kg 64
130
Embodied Water, L/kg 180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 190
410
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 22
32
Strength to Weight: Bending, points 20
38
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 0
72.7 to 79.6
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
4.0 to 5.0
Iron (Fe), % 53.7 to 61.3
0 to 1.3
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0 to 0.1
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
16 to 18
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 1.5
Residuals, % 0
0 to 0.2