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5457 Aluminum vs. S31730 Stainless Steel

5457 aluminum belongs to the aluminum alloys classification, while S31730 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 5457 aluminum and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 55
180
Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 6.0 to 22
40
Fatigue Strength, MPa 55 to 98
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 85 to 130
370
Tensile Strength: Ultimate (UTS), MPa 130 to 210
540
Tensile Strength: Yield (Proof), MPa 50 to 190
200

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 180
990
Melting Completion (Liquidus), °C 660
1430
Melting Onset (Solidus), °C 630
1390
Specific Heat Capacity, J/kg-K 900
470
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
24
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 8.4
4.6
Embodied Energy, MJ/kg 160
63
Embodied Water, L/kg 1190
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
170
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 250
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 13 to 21
19
Strength to Weight: Bending, points 21 to 28
18
Thermal Shock Resistance, points 5.7 to 9.0
12

Alloy Composition

Aluminum (Al), % 97.8 to 99.05
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.2
4.0 to 5.0
Iron (Fe), % 0 to 0.1
52.4 to 61
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0.15 to 0.45
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0 to 0.1
0