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R30012 Cobalt vs. AWS BCo-1

Both R30012 cobalt and AWS BCo-1 are cobalt alloys. They have 76% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 86
78
Tensile Strength: Ultimate (UTS), MPa 830
700

Thermal Properties

Latent Heat of Fusion, J/g 320
420
Melting Completion (Liquidus), °C 1470
1150
Melting Onset (Solidus), °C 1280
1120
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.1
Embodied Carbon, kg CO2/kg material 8.3
8.0
Embodied Energy, MJ/kg 120
110
Embodied Water, L/kg 480
430

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 22
22
Thermal Shock Resistance, points 23
21

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 1.4 to 2.0
0.35 to 0.45
Chromium (Cr), % 27 to 32
18 to 20
Cobalt (Co), % 47.5 to 64.1
46 to 54
Iron (Fe), % 0 to 3.0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
16 to 18
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 2.0
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 7.5 to 9.5
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5