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Grade CW6M Nickel vs. R30605 Cobalt

Grade CW6M nickel belongs to the nickel alloys classification, while R30605 cobalt belongs to the cobalt alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade CW6M nickel and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 29
34
Fatigue Strength, MPa 210
260 to 590
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 84
81
Tensile Strength: Ultimate (UTS), MPa 560
1130 to 1900
Tensile Strength: Yield (Proof), MPa 310
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Melting Completion (Liquidus), °C 1530
1410
Melting Onset (Solidus), °C 1470
1330
Specific Heat Capacity, J/kg-K 430
410
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.8
9.6
Embodied Carbon, kg CO2/kg material 13
9.8
Embodied Energy, MJ/kg 170
140
Embodied Water, L/kg 300
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 18
33 to 55
Strength to Weight: Bending, points 17
25 to 36
Thermal Shock Resistance, points 16
31 to 52

Alloy Composition

Carbon (C), % 0 to 0.070
0.050 to 0.15
Chromium (Cr), % 17 to 20
19 to 21
Cobalt (Co), % 0
46.4 to 57
Iron (Fe), % 0 to 3.0
0 to 3.0
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 17 to 20
0
Nickel (Ni), % 54.9 to 66
9.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
14 to 16