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R30155 Cobalt vs. 50Cr-50Ni Alloy

R30155 cobalt belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. They have 43% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 34
5.7
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 81
84
Tensile Strength: Ultimate (UTS), MPa 850
620
Tensile Strength: Yield (Proof), MPa 390
390

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Specific Heat Capacity, J/kg-K 450
490
Thermal Expansion, µm/m-K 14
15

Otherwise Unclassified Properties

Base Metal Price, % relative 80
50
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 9.7
7.9
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 300
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
31
Resilience: Unit (Modulus of Resilience), kJ/m3 370
350
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
21
Strength to Weight: Bending, points 24
20
Thermal Shock Resistance, points 21
14

Alloy Composition

Aluminum (Al), % 0
0 to 0.25
Carbon (C), % 0.080 to 0.16
0 to 0.1
Chromium (Cr), % 20 to 22.5
48 to 52
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
0 to 1.0
Manganese (Mn), % 1.0 to 2.0
0 to 0.3
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
44.5 to 52
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 0.75 to 1.3
0
Titanium (Ti), % 0
0 to 0.5
Tungsten (W), % 2.0 to 3.0
0