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S45503 Stainless Steel vs. 2024 Aluminum

S45503 stainless steel belongs to the iron alloys classification, while 2024 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (11, 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 S45503 stainless steel and the bottom bar is 2024 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 4.6 to 6.8
4.0 to 16
Fatigue Strength, MPa 710 to 800
90 to 180
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
27
Shear Strength, MPa 940 to 1070
130 to 320
Tensile Strength: Ultimate (UTS), MPa 1610 to 1850
200 to 540
Tensile Strength: Yield (Proof), MPa 1430 to 1700
100 to 490

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 760
200
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
500
Specific Heat Capacity, J/kg-K 470
880
Thermal Expansion, µm/m-K 11
23

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 3.4
8.3
Embodied Energy, MJ/kg 48
150
Embodied Water, L/kg 120
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 110
20 to 68
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 57 to 65
18 to 50
Strength to Weight: Bending, points 39 to 43
25 to 49
Thermal Shock Resistance, points 56 to 64
8.6 to 24

Alloy Composition

Aluminum (Al), % 0
90.7 to 94.7
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 11 to 12.5
0 to 0.1
Copper (Cu), % 1.5 to 2.5
3.8 to 4.9
Iron (Fe), % 72.4 to 78.9
0 to 0.5
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 0.5
0.3 to 0.9
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 7.5 to 9.5
0
Niobium (Nb), % 0.1 to 0.5
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.2
0 to 0.5
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 1.0 to 1.4
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15