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8079 Aluminum vs. S32808 Stainless Steel

8079 aluminum belongs to the aluminum alloys classification, while S32808 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 8079 aluminum and the bottom bar is S32808 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 2.2
17
Fatigue Strength, MPa 56
350
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 150
780
Tensile Strength: Yield (Proof), MPa 120
570

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 650
1470
Melting Onset (Solidus), °C 640
1420
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 230
14
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 58
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 190
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
24
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.2
4.0
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 1180
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1
120
Resilience: Unit (Modulus of Resilience), kJ/m3 110
790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 15
27
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 92
3.8
Thermal Shock Resistance, points 6.4
21

Alloy Composition

Aluminum (Al), % 98.1 to 99.3
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
27 to 27.9
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0.7 to 1.3
58.1 to 62.8
Manganese (Mn), % 0
0 to 1.1
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 0
7.0 to 8.2
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.050 to 0.3
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Tungsten (W), % 0
2.1 to 2.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0