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R30155 Cobalt vs. Grade M35-2 Nickel

R30155 cobalt belongs to the iron alloys classification, while grade M35-2 nickel belongs to the nickel 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 R30155 cobalt and the bottom bar is grade M35-2 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
160
Elongation at Break, % 34
28
Fatigue Strength, MPa 310
160
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 81
62
Tensile Strength: Ultimate (UTS), MPa 850
500
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1470
1280
Melting Onset (Solidus), °C 1420
1230
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 12
22
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
55
Density, g/cm3 8.5
8.8
Embodied Carbon, kg CO2/kg material 9.7
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 300
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
170
Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 28
16
Strength to Weight: Bending, points 24
16
Thermal Diffusivity, mm2/s 3.2
5.7
Thermal Shock Resistance, points 21
17

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.35
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
26 to 33
Iron (Fe), % 24.3 to 36.2
0 to 3.5
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
59.1 to 74
Niobium (Nb), % 0.75 to 1.3
0 to 0.5
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0