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AWS BNi-3 vs. R30021 Cobalt

AWS BNi-3 belongs to the nickel alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-3 and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
220
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 66
86
Tensile Strength: Ultimate (UTS), MPa 430
700

Thermal Properties

Latent Heat of Fusion, J/g 350
330
Melting Completion (Liquidus), °C 1040
1350
Melting Onset (Solidus), °C 980
1190
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 9.9
8.0
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 220
520

Common Calculations

Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 14
23
Strength to Weight: Bending, points 15
21
Thermal Shock Resistance, points 17
21

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 2.8 to 3.5
0
Carbon (C), % 0 to 0.060
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0 to 0.1
61.7 to 67.3
Iron (Fe), % 0 to 0.5
0 to 3.0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 90.1 to 93.3
2.0 to 3.0
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 4.0 to 5.0
0 to 1.5
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0