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R31233 Cobalt vs. 50Cr-50Ni Alloy

R31233 cobalt belongs to the cobalt alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. They have a modest 36% 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 (8, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 17
5.7
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 85
84
Tensile Strength: Ultimate (UTS), MPa 1020
620
Tensile Strength: Yield (Proof), MPa 420
390

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Specific Heat Capacity, J/kg-K 440
490
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.0
Embodied Carbon, kg CO2/kg material 8.4
7.9
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 480
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
31
Resilience: Unit (Modulus of Resilience), kJ/m3 410
350
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
21
Strength to Weight: Bending, points 26
20
Thermal Shock Resistance, points 25
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.1
Chromium (Cr), % 23.5 to 27.5
48 to 52
Cobalt (Co), % 44.7 to 63.3
0
Iron (Fe), % 1.0 to 5.0
0 to 1.0
Manganese (Mn), % 0.1 to 1.5
0 to 0.3
Molybdenum (Mo), % 4.0 to 6.0
0
Nickel (Ni), % 7.0 to 11
44.5 to 52
Nitrogen (N), % 0.030 to 0.12
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.050 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0
0 to 0.5
Tungsten (W), % 1.0 to 3.0
0