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50Cr-50Ni Alloy vs. R30155 Cobalt

50Cr-50Ni alloy belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. 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 50Cr-50Ni alloy and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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