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50Cr-50Ni-Cb Alloy vs. R30021 Cobalt

50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. They have a modest 31% 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 R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 5.6
9.0
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 84
86
Tensile Strength: Ultimate (UTS), MPa 620
700
Tensile Strength: Yield (Proof), MPa 390
500

Thermal Properties

Latent Heat of Fusion, J/g 350
330
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 9.2
8.0
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 350
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30
57
Resilience: Unit (Modulus of Resilience), kJ/m3 370
570
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
23
Strength to Weight: Bending, points 20
21
Thermal Shock Resistance, points 14
21

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Carbon (C), % 0 to 0.1
0.2 to 0.35
Chromium (Cr), % 47 to 52
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Iron (Fe), % 0 to 1.0
0 to 3.0
Manganese (Mn), % 0 to 0.3
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 43.3 to 51.6
2.0 to 3.0
Niobium (Nb), % 1.4 to 1.7
0
Nitrogen (N), % 0 to 0.16
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.5
0