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8090 Aluminum vs. S45503 Stainless Steel

8090 aluminum belongs to the aluminum alloys classification, while S45503 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (12, 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 8090 aluminum and the bottom bar is S45503 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
190
Elongation at Break, % 3.5 to 13
4.6 to 6.8
Fatigue Strength, MPa 91 to 140
710 to 800
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
75
Tensile Strength: Ultimate (UTS), MPa 340 to 490
1610 to 1850
Tensile Strength: Yield (Proof), MPa 210 to 420
1430 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 190
760
Melting Completion (Liquidus), °C 660
1440
Melting Onset (Solidus), °C 600
1400
Specific Heat Capacity, J/kg-K 960
470
Thermal Expansion, µm/m-K 24
11

Otherwise Unclassified Properties

Base Metal Price, % relative 18
15
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.6
3.4
Embodied Energy, MJ/kg 170
48
Embodied Water, L/kg 1160
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 41
82 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 34 to 49
57 to 65
Strength to Weight: Bending, points 39 to 50
39 to 43
Thermal Shock Resistance, points 15 to 22
56 to 64

Alloy Composition


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Aluminum (Al), % 93 to 98.4
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0 to 0.1
11 to 12.5
Copper (Cu), % 1.0 to 1.6
1.5 to 2.5
Iron (Fe), % 0 to 0.3
72.4 to 78.9
Lithium (Li), % 2.2 to 2.7
0
Magnesium (Mg), % 0.6 to 1.3
0
Manganese (Mn), % 0 to 0.1
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
7.5 to 9.5
Niobium (Nb), % 0
0.1 to 0.5
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0 to 0.2
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.1
1.0 to 1.4
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.040 to 0.16
0
Residuals, % 0 to 0.15
0