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Grade N7M Nickel vs. R31537 Cobalt

Grade N7M nickel belongs to the nickel alloys classification, while R31537 cobalt belongs to the cobalt alloys. 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 N7M nickel and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 22
14 to 23
Fatigue Strength, MPa 190
310 to 480
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 85
87
Tensile Strength: Ultimate (UTS), MPa 590
1000 to 1340
Tensile Strength: Yield (Proof), MPa 310
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1650
1360
Melting Onset (Solidus), °C 1590
1290
Specific Heat Capacity, J/kg-K 390
450
Thermal Expansion, µm/m-K 9.9
13

Otherwise Unclassified Properties

Density, g/cm3 9.3
8.4
Embodied Carbon, kg CO2/kg material 16
8.1
Embodied Energy, MJ/kg 200
110
Embodied Water, L/kg 270
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 220
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 18
33 to 44
Strength to Weight: Bending, points 17
26 to 32
Thermal Shock Resistance, points 19
24 to 32

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.14
Chromium (Cr), % 0 to 1.0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Iron (Fe), % 0 to 3.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 30 to 33
5.0 to 7.0
Nickel (Ni), % 60.9 to 70
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