MakeItFrom.com
Menu (ESC)

R31538 Cobalt vs. AWS BNi-7

R31538 cobalt belongs to the cobalt alloys classification, while AWS BNi-7 belongs to the nickel 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 R31538 cobalt and the bottom bar is AWS BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
170
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 86
67
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
550

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
890
Melting Onset (Solidus), °C 1290
890
Specific Heat Capacity, J/kg-K 450
490
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
19
Strength to Weight: Bending, points 27 to 32
19
Thermal Shock Resistance, points 25 to 33
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0 to 0.010
Carbon (C), % 0.15 to 0.35
0 to 0.060
Chromium (Cr), % 26 to 30
13 to 15
Cobalt (Co), % 58.7 to 68.9
0 to 0.1
Iron (Fe), % 0 to 0.75
0 to 0.2
Manganese (Mn), % 0 to 1.0
0 to 0.040
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
73.3 to 77.3
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
9.7 to 10.5
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5