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R30001 Cobalt vs. AWS E2209

R30001 cobalt belongs to the cobalt alloys classification, while AWS E2209 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 (4, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is AWS E2209.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
23
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
79
Tensile Strength: Ultimate (UTS), MPa 620
770

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1530
1440
Melting Onset (Solidus), °C 1260
1390
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.5

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 8.9
4.0
Embodied Energy, MJ/kg 130
55
Embodied Water, L/kg 460
170

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19
27
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 3.7
4.3
Thermal Shock Resistance, points 19
20

Alloy Composition

Carbon (C), % 2.0 to 3.0
0 to 0.040
Chromium (Cr), % 28 to 32
21.5 to 23.5
Cobalt (Co), % 43 to 59
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 3.0
58.4 to 66.9
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0 to 1.0
2.5 to 3.5
Nickel (Ni), % 0 to 3.0
8.5 to 10.5
Nitrogen (N), % 0
0.080 to 0.2
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), % 11 to 13
0