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5086 Aluminum vs. SAE-AISI 8655 Steel

5086 aluminum belongs to the aluminum alloys classification, while SAE-AISI 8655 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 5086 aluminum and the bottom bar is SAE-AISI 8655 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 65 to 100
190
Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 1.7 to 20
23
Fatigue Strength, MPa 88 to 180
290
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 160 to 230
390
Tensile Strength: Ultimate (UTS), MPa 270 to 390
620
Tensile Strength: Yield (Proof), MPa 110 to 320
410

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 190
410
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 590
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
39
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.6
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.8
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.8 to 42
130
Resilience: Unit (Modulus of Resilience), kJ/m3 86 to 770
440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 28 to 40
22
Strength to Weight: Bending, points 34 to 44
21
Thermal Diffusivity, mm2/s 52
10
Thermal Shock Resistance, points 12 to 17
18

Alloy Composition

Aluminum (Al), % 93 to 96.3
0
Carbon (C), % 0
0.51 to 0.59
Chromium (Cr), % 0.050 to 0.25
0.4 to 0.6
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
96.4 to 97.6
Magnesium (Mg), % 3.5 to 4.5
0
Manganese (Mn), % 0.2 to 0.7
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0