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850.0 Aluminum vs. S31727 Stainless Steel

850.0 aluminum belongs to the aluminum alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 850.0 aluminum and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45
190
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 7.9
40
Fatigue Strength, MPa 59
240
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Shear Strength, MPa 100
430
Tensile Strength: Ultimate (UTS), MPa 140
630
Tensile Strength: Yield (Proof), MPa 76
270

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 190
1010
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 370
1390
Specific Heat Capacity, J/kg-K 850
470
Thermal Expansion, µm/m-K 23
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
24
Density, g/cm3 3.1
8.0
Embodied Carbon, kg CO2/kg material 8.5
4.7
Embodied Energy, MJ/kg 160
64
Embodied Water, L/kg 1160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1
200
Resilience: Unit (Modulus of Resilience), kJ/m3 42
190
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 44
24
Strength to Weight: Axial, points 12
22
Strength to Weight: Bending, points 19
20
Thermal Shock Resistance, points 6.1
14

Alloy Composition

Aluminum (Al), % 88.3 to 93.1
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0.7 to 1.3
2.8 to 4.0
Iron (Fe), % 0 to 0.7
53.7 to 61.3
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0.7 to 1.3
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Residuals, % 0 to 0.3
0