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6351 Aluminum vs. AWS E16-8-2

6351 aluminum belongs to the aluminum alloys classification, while AWS E16-8-2 belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 6351 aluminum and the bottom bar is AWS E16-8-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 7.8 to 18
40
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 140 to 310
620

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 570
1400
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
16
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 150
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.3
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1180
140

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 14 to 32
22
Strength to Weight: Bending, points 22 to 38
20
Thermal Diffusivity, mm2/s 72
4.2
Thermal Shock Resistance, points 6.1 to 14
16

Alloy Composition

Aluminum (Al), % 96 to 98.5
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
14.5 to 16.5
Copper (Cu), % 0 to 0.1
0 to 0.75
Iron (Fe), % 0 to 0.5
68 to 76.5
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 0.8
0.5 to 2.5
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
7.5 to 9.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.7 to 1.3
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0