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50Cr-50Ni-Cb Alloy vs. R30008 Cobalt

50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals classification, while R30008 cobalt belongs to the cobalt alloys. They have a modest 37% 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 (4, in this case) are not shown.

For each property being compared, the top bar is 50Cr-50Ni-Cb alloy and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 5.6
1.1 to 73
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 84
83
Tensile Strength: Ultimate (UTS), MPa 620
950 to 1700
Tensile Strength: Yield (Proof), MPa 390
500 to 1080

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

Base Metal Price, % relative 60
95
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
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 370
590 to 2720
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
31 to 56
Strength to Weight: Bending, points 20
25 to 37
Thermal Shock Resistance, points 14
25 to 44

Alloy Composition

Aluminum (Al), % 0 to 0.25
0
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 47 to 52
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Iron (Fe), % 0 to 1.0
7.6 to 20
Manganese (Mn), % 0 to 0.3
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 43.3 to 51.6
15 to 18
Niobium (Nb), % 1.4 to 1.7
0
Nitrogen (N), % 0 to 0.16
0
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 1.2
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0 to 0.5
0