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R31539 Cobalt vs. AWS E16-8-2

R31539 cobalt belongs to the cobalt alloys classification, while AWS E16-8-2 belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is AWS E16-8-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 22
40
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
620

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1440
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.2
3.2
Embodied Energy, MJ/kg 110
45
Embodied Water, L/kg 530
140

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
22
Strength to Weight: Bending, points 27 to 32
20
Thermal Diffusivity, mm2/s 3.5
4.2
Thermal Shock Resistance, points 24 to 32
16

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.1
Chromium (Cr), % 26 to 30
14.5 to 16.5
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 0.75
68 to 76.5
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.5 to 2.5
Molybdenum (Mo), % 5.0 to 7.0
1.0 to 2.0
Nickel (Ni), % 0 to 1.0
7.5 to 9.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0
0 to 0.030