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R30006 Cobalt vs. AWS E383

R30006 cobalt belongs to the cobalt alloys classification, while AWS E383 belongs to the iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AWS E383.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 1.0
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
80
Tensile Strength: Ultimate (UTS), MPa 900
580

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1290
1370
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 7.8
6.4
Embodied Energy, MJ/kg 110
89
Embodied Water, L/kg 500
240

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
20
Strength to Weight: Bending, points 24
19
Thermal Diffusivity, mm2/s 3.9
3.1
Thermal Shock Resistance, points 26
15

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.030
Chromium (Cr), % 27 to 32
26.5 to 29
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0.6 to 1.5
Iron (Fe), % 0 to 3.0
28.8 to 39.2
Manganese (Mn), % 0
0.5 to 2.5
Molybdenum (Mo), % 0 to 1.0
3.2 to 4.2
Nickel (Ni), % 0 to 3.0
30 to 33
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.9
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 4.0 to 6.0
0