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50Cr-50Ni-Cb Alloy vs. R31537 Cobalt

50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals classification, while R31537 cobalt belongs to the cobalt alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is 50Cr-50Ni-Cb alloy and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 5.6
14 to 23
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 84
87
Tensile Strength: Ultimate (UTS), MPa 620
1000 to 1340
Tensile Strength: Yield (Proof), MPa 390
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 9.2
8.1
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 350
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 370
780 to 1990
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
33 to 44
Strength to Weight: Bending, points 20
26 to 32
Thermal Shock Resistance, points 14
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
0 to 0.14
Chromium (Cr), % 47 to 52
26 to 30
Cobalt (Co), % 0
58.9 to 69
Iron (Fe), % 0 to 1.0
0 to 0.75
Manganese (Mn), % 0 to 0.3
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 43.3 to 51.6
0 to 1.0
Niobium (Nb), % 1.4 to 1.7
0
Nitrogen (N), % 0 to 0.16
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.5
0