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Grade M35-2 Nickel vs. R30155 Cobalt

Grade M35-2 nickel belongs to the nickel alloys classification, while R30155 cobalt belongs to the iron alloys. They have a modest 23% 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 M35-2 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, % 28
34
Fatigue Strength, MPa 160
310
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 62
81
Tensile Strength: Ultimate (UTS), MPa 500
850
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1280
1470
Melting Onset (Solidus), °C 1230
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 55
80
Density, g/cm3 8.8
8.5
Embodied Carbon, kg CO2/kg material 8.1
9.7
Embodied Energy, MJ/kg 110
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 170
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 17
21

Alloy Composition

Carbon (C), % 0 to 0.35
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), % 59.1 to 74
19 to 21
Niobium (Nb), % 0 to 0.5
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 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