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50Cr-50Ni-Cb Alloy vs. R30075 Cobalt

50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals classification, while R30075 cobalt belongs to the cobalt alloys. They have a modest 30% 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 (9, in this case) are not shown.

For each property being compared, the top bar is 50Cr-50Ni-Cb alloy and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210 to 250
Elongation at Break, % 5.6
12
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 84
82 to 98
Tensile Strength: Ultimate (UTS), MPa 620
780 to 1280
Tensile Strength: Yield (Proof), MPa 390
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 15
12

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
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 370
560 to 1410
Stiffness to Weight: Axial, points 15
14 to 17
Stiffness to Weight: Bending, points 25
24 to 25
Strength to Weight: Axial, points 21
26 to 42
Strength to Weight: Bending, points 20
22 to 31
Thermal Shock Resistance, points 14
21 to 29

Alloy Composition

Aluminum (Al), % 0 to 0.25
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0 to 0.1
0 to 0.35
Chromium (Cr), % 47 to 52
27 to 30
Cobalt (Co), % 0
58.7 to 68
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 0.5
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 to 0.020
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0 to 0.5
0 to 0.1
Tungsten (W), % 0
0 to 0.2