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Grade M30C Nickel vs. R30155 Cobalt

Grade M30C nickel belongs to the nickel alloys classification, while R30155 cobalt belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 M30C nickel and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 160
210
Elongation at Break, % 29
34
Fatigue Strength, MPa 170
310
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 61
81
Tensile Strength: Ultimate (UTS), MPa 510
850
Tensile Strength: Yield (Proof), MPa 250
390

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1290
1470
Melting Onset (Solidus), °C 1240
1420
Specific Heat Capacity, J/kg-K 430
450
Thermal Conductivity, W/m-K 22
12
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 60
80
Density, g/cm3 8.8
8.5
Embodied Carbon, kg CO2/kg material 9.5
9.7
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 250
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
230
Resilience: Unit (Modulus of Resilience), kJ/m3 200
370
Stiffness to Weight: Axial, points 10
14
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 16
28
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 5.7
3.2
Thermal Shock Resistance, points 18
21

Alloy Composition

Carbon (C), % 0 to 0.3
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 26 to 33
0
Iron (Fe), % 0 to 3.5
24.3 to 36.2
Manganese (Mn), % 0 to 1.5
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 56.6 to 72
19 to 21
Niobium (Nb), % 1.0 to 3.0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 1.0 to 2.0
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
2.0 to 3.0