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SAE-AISI 1008 Steel vs. 6351 Aluminum

SAE-AISI 1008 steel belongs to the iron alloys classification, while 6351 aluminum belongs to the aluminum alloys. There are 30 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 SAE-AISI 1008 steel and the bottom bar is 6351 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 22 to 33
7.8 to 18
Fatigue Strength, MPa 150 to 220
79 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 220 to 230
84 to 200
Tensile Strength: Ultimate (UTS), MPa 330 to 370
140 to 310
Tensile Strength: Yield (Proof), MPa 190 to 310
95 to 270

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 400
160
Melting Completion (Liquidus), °C 1470
650
Melting Onset (Solidus), °C 1430
570
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 62
180
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.9
46
Electrical Conductivity: Equal Weight (Specific), % IACS 7.9
150

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.3
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 45
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 91
20 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 260
65 to 540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 12 to 13
14 to 32
Strength to Weight: Bending, points 13 to 15
22 to 38
Thermal Diffusivity, mm2/s 17
72
Thermal Shock Resistance, points 10 to 12
6.1 to 14

Alloy Composition

Aluminum (Al), % 0
96 to 98.5
Carbon (C), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 99.31 to 99.7
0 to 0.5
Magnesium (Mg), % 0
0.4 to 0.8
Manganese (Mn), % 0.3 to 0.5
0.4 to 0.8
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0.7 to 1.3
Sulfur (S), % 0 to 0.050
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15