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SAE-AISI 8655 Steel vs. 5005A Aluminum

SAE-AISI 8655 steel belongs to the iron alloys classification, while 5005A aluminum belongs to the aluminum alloys. 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 SAE-AISI 8655 steel and the bottom bar is 5005A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
29 to 64
Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 23
1.1 to 21
Fatigue Strength, MPa 290
38 to 82
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 390
71 to 130
Tensile Strength: Ultimate (UTS), MPa 620
110 to 230
Tensile Strength: Yield (Proof), MPa 410
43 to 210

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1460
660
Melting Onset (Solidus), °C 1410
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39
200
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
52
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
170

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.5
8.3
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 50
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
2.0 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 440
14 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 22
12 to 24
Strength to Weight: Bending, points 21
19 to 31
Thermal Diffusivity, mm2/s 10
82
Thermal Shock Resistance, points 18
5.0 to 10

Alloy Composition

Aluminum (Al), % 0
97.5 to 99.3
Carbon (C), % 0.51 to 0.59
0
Chromium (Cr), % 0.4 to 0.6
0 to 0.1
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 96.4 to 97.6
0 to 0.45
Magnesium (Mg), % 0
0.7 to 1.1
Manganese (Mn), % 0.75 to 1.0
0 to 0.15
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.3
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15