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S21603 Stainless Steel vs. 5457 Aluminum

S21603 stainless steel belongs to the iron alloys classification, while 5457 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, 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 S21603 stainless steel and the bottom bar is 5457 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
32 to 55
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 45
6.0 to 22
Fatigue Strength, MPa 360
55 to 98
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 490
85 to 130
Tensile Strength: Ultimate (UTS), MPa 690
130 to 210
Tensile Strength: Yield (Proof), MPa 390
50 to 190

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 990
180
Melting Completion (Liquidus), °C 1420
660
Melting Onset (Solidus), °C 1380
630
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 17
24

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 3.6
8.4
Embodied Energy, MJ/kg 50
160
Embodied Water, L/kg 160
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
12 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 380
18 to 250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 25
13 to 21
Strength to Weight: Bending, points 22
21 to 28
Thermal Shock Resistance, points 15
5.7 to 9.0

Alloy Composition

Aluminum (Al), % 0
97.8 to 99.05
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 22
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 57.6 to 67.8
0 to 0.1
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 7.5 to 9.0
0.15 to 0.45
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 5.0 to 7.0
0
Nitrogen (N), % 0.25 to 0.5
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0 to 0.080
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.1