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Grade CW12MW Nickel vs. R31538 Cobalt

Grade CW12MW nickel belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 CW12MW nickel and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 4.6
13 to 23
Fatigue Strength, MPa 130
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
86
Tensile Strength: Ultimate (UTS), MPa 560
1020 to 1360
Tensile Strength: Yield (Proof), MPa 310
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1610
1360
Melting Onset (Solidus), °C 1560
1290
Specific Heat Capacity, J/kg-K 410
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.4
Embodied Carbon, kg CO2/kg material 13
8.1
Embodied Energy, MJ/kg 180
110
Embodied Water, L/kg 280
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 220
750 to 1920
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 17
34 to 45
Strength to Weight: Bending, points 17
27 to 32
Thermal Shock Resistance, points 16
25 to 33

Alloy Composition

Carbon (C), % 0 to 0.12
0.15 to 0.35
Chromium (Cr), % 15.5 to 17.5
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Iron (Fe), % 4.5 to 7.5
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 16 to 18
5.0 to 7.0
Nickel (Ni), % 49.2 to 60.1
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 3.8 to 5.3
0
Vanadium (V), % 0.2 to 0.4
0