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AWS BNi-1a vs. R31537 Cobalt

AWS BNi-1a belongs to the nickel alloys classification, while R31537 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-1a and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 70
87
Tensile Strength: Ultimate (UTS), MPa 450
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Melting Completion (Liquidus), °C 1080
1360
Melting Onset (Solidus), °C 980
1290
Specific Heat Capacity, J/kg-K 500
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 8.8
8.1
Embodied Energy, MJ/kg 120
110
Embodied Water, L/kg 240
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16
33 to 44
Strength to Weight: Bending, points 16
26 to 32
Thermal Shock Resistance, points 15
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 2.8 to 3.5
0
Carbon (C), % 0 to 0.060
0 to 0.14
Chromium (Cr), % 13 to 15
26 to 30
Cobalt (Co), % 0 to 0.1
58.9 to 69
Iron (Fe), % 4.0 to 5.0
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 70.6 to 76.3
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 4.0 to 5.0
0 to 1.0
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