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S20431 Stainless Steel vs. 357.0 Aluminum

S20431 stainless steel belongs to the iron alloys classification, while 357.0 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 S20431 stainless steel and the bottom bar is 357.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
95
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 46
3.4
Fatigue Strength, MPa 320
76
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 500
200
Tensile Strength: Ultimate (UTS), MPa 710
350
Tensile Strength: Yield (Proof), MPa 350
300

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Maximum Temperature: Mechanical, °C 890
170
Melting Completion (Liquidus), °C 1400
620
Melting Onset (Solidus), °C 1360
560
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
39
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
140

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.7
2.6
Embodied Carbon, kg CO2/kg material 2.5
8.0
Embodied Energy, MJ/kg 36
150
Embodied Water, L/kg 140
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
11
Resilience: Unit (Modulus of Resilience), kJ/m3 310
620
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 25
38
Strength to Weight: Bending, points 23
43
Thermal Diffusivity, mm2/s 4.0
64
Thermal Shock Resistance, points 15
17

Alloy Composition

Aluminum (Al), % 0
91.3 to 93.1
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 17 to 18
0
Copper (Cu), % 1.5 to 3.5
0 to 0.050
Iron (Fe), % 66.1 to 74.4
0 to 0.15
Magnesium (Mg), % 0
0.45 to 0.6
Manganese (Mn), % 5.0 to 7.0
0 to 0.030
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
6.5 to 7.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.15