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S31803 Stainless Steel vs. 5652 Aluminum

S31803 stainless steel belongs to the iron alloys classification, while 5652 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 S31803 stainless steel and the bottom bar is 5652 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
47 to 77
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 29
6.8 to 25
Fatigue Strength, MPa 370
60 to 140
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 460
110 to 170
Tensile Strength: Ultimate (UTS), MPa 710
190 to 290
Tensile Strength: Yield (Proof), MPa 500
74 to 260

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1060
190
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1400
610
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 16
140
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
35
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
120

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.6
8.6
Embodied Energy, MJ/kg 49
150
Embodied Water, L/kg 160
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
12 to 39
Resilience: Unit (Modulus of Resilience), kJ/m3 630
40 to 480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 25
20 to 30
Strength to Weight: Bending, points 23
27 to 36
Thermal Diffusivity, mm2/s 4.3
57
Thermal Shock Resistance, points 20
8.4 to 13

Alloy Composition

Aluminum (Al), % 0
95.8 to 97.7
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 21 to 23
0.15 to 0.35
Copper (Cu), % 0
0 to 0.040
Iron (Fe), % 63.7 to 71.9
0 to 0.4
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 0 to 2.0
0 to 0.010
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15