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S21603 Stainless Steel vs. 5454 Aluminum

S21603 stainless steel belongs to the iron alloys classification, while 5454 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 5454 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
61 to 93
Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 45
2.3 to 18
Fatigue Strength, MPa 360
83 to 160
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 490
140 to 200
Tensile Strength: Ultimate (UTS), MPa 690
230 to 350
Tensile Strength: Yield (Proof), MPa 390
97 to 290

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 990
190
Melting Completion (Liquidus), °C 1420
650
Melting Onset (Solidus), °C 1380
600
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
8.6
Embodied Energy, MJ/kg 50
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
6.3 to 34
Resilience: Unit (Modulus of Resilience), kJ/m3 380
68 to 590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 25
23 to 36
Strength to Weight: Bending, points 22
30 to 41
Thermal Shock Resistance, points 15
10 to 16

Alloy Composition

Aluminum (Al), % 0
94.5 to 97.1
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 22
0.050 to 0.2
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 57.6 to 67.8
0 to 0.4
Magnesium (Mg), % 0
2.4 to 3.0
Manganese (Mn), % 7.5 to 9.0
0.5 to 1.0
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 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15