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Grade CW2M Nickel vs. R30155 Cobalt

Grade CW2M nickel belongs to the nickel alloys classification, while R30155 cobalt belongs to the iron alloys. They have 42% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade CW2M nickel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
34
Fatigue Strength, MPa 190
310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
81
Tensile Strength: Ultimate (UTS), MPa 560
850
Tensile Strength: Yield (Proof), MPa 310
390

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 960
1100
Melting Completion (Liquidus), °C 1520
1470
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 430
450
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 70
80
Density, g/cm3 8.8
8.5
Embodied Carbon, kg CO2/kg material 12
9.7
Embodied Energy, MJ/kg 170
150
Embodied Water, L/kg 290
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
230
Resilience: Unit (Modulus of Resilience), kJ/m3 220
370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 18
28
Strength to Weight: Bending, points 17
24
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0 to 0.020
0.080 to 0.16
Chromium (Cr), % 15 to 17.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 0 to 2.0
24.3 to 36.2
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 15 to 17.5
2.5 to 3.5
Nickel (Ni), % 60.1 to 70
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0 to 1.0
2.0 to 3.0