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R30006 Cobalt vs. AWS E309H

R30006 cobalt belongs to the cobalt alloys classification, while AWS E309H belongs to the iron alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AWS E309H.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
34
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 900
620

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1290
1370
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.5

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
3.7
Embodied Energy, MJ/kg 110
52
Embodied Water, L/kg 500
180

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
22
Strength to Weight: Bending, points 24
21
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 26
16

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.040 to 0.15
Chromium (Cr), % 27 to 32
22 to 25
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 3.0
55.8 to 65.5
Manganese (Mn), % 0
0.5 to 2.5
Molybdenum (Mo), % 0 to 1.0
0 to 0.75
Nickel (Ni), % 0 to 3.0
12 to 14
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 4.0 to 6.0
0