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AWS BNi-5 vs. R30012 Cobalt

AWS BNi-5 belongs to the nickel alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. 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-5 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
86
Tensile Strength: Ultimate (UTS), MPa 470
830

Thermal Properties

Latent Heat of Fusion, J/g 470
320
Melting Completion (Liquidus), °C 1140
1470
Melting Onset (Solidus), °C 1080
1280
Specific Heat Capacity, J/kg-K 510
440
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.8
Embodied Carbon, kg CO2/kg material 8.9
8.3
Embodied Energy, MJ/kg 130
120
Embodied Water, L/kg 260
480

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 17
26
Strength to Weight: Bending, points 17
22
Thermal Shock Resistance, points 15
23

Alloy Composition


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Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0 to 0.030
0
Carbon (C), % 0 to 0.060
1.4 to 2.0
Chromium (Cr), % 18.5 to 19.5
27 to 32
Cobalt (Co), % 0 to 0.1
47.5 to 64.1
Iron (Fe), % 0
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 69.1 to 71.8
0 to 3.0
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 9.8 to 10.5
0 to 2.0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 0
7.5 to 9.5
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0