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S21900 Stainless Steel vs. 520.0 Aluminum

S21900 stainless steel belongs to the iron alloys classification, while 520.0 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 S21900 stainless steel and the bottom bar is 520.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
75
Elastic (Young's, Tensile) Modulus, GPa 200
66
Elongation at Break, % 50
14
Fatigue Strength, MPa 380
55
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
25
Shear Strength, MPa 510
230
Tensile Strength: Ultimate (UTS), MPa 710
330
Tensile Strength: Yield (Proof), MPa 390
170

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 980
170
Melting Completion (Liquidus), °C 1400
600
Melting Onset (Solidus), °C 1350
480
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 14
87
Thermal Expansion, µm/m-K 17
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
21
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
72

Otherwise Unclassified Properties

Base Metal Price, % relative 15
9.5
Density, g/cm3 7.7
2.6
Embodied Carbon, kg CO2/kg material 3.0
9.8
Embodied Energy, MJ/kg 43
160
Embodied Water, L/kg 160
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
39
Resilience: Unit (Modulus of Resilience), kJ/m3 380
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 26
35
Strength to Weight: Bending, points 23
41
Thermal Diffusivity, mm2/s 3.8
37
Thermal Shock Resistance, points 15
14

Alloy Composition

Aluminum (Al), % 0
87.9 to 90.5
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 59.4 to 67.4
0 to 0.3
Magnesium (Mg), % 0
9.5 to 10.6
Manganese (Mn), % 8.0 to 10
0 to 0.15
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15