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R30605 Cobalt vs. Nickel 684

R30605 cobalt belongs to the cobalt alloys classification, while nickel 684 belongs to the nickel alloys. They have 46% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
11
Fatigue Strength, MPa 260 to 590
390
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
1190
Tensile Strength: Yield (Proof), MPa 470 to 1600
800

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1410
1370
Melting Onset (Solidus), °C 1330
1320
Specific Heat Capacity, J/kg-K 410
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.3
Embodied Carbon, kg CO2/kg material 9.8
10
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 450
360

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 33 to 55
40
Strength to Weight: Bending, points 25 to 36
30
Thermal Shock Resistance, points 31 to 52
34

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.3
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 19 to 21
15 to 20
Cobalt (Co), % 46.4 to 57
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 3.0
0 to 4.0
Manganese (Mn), % 1.0 to 2.0
0 to 0.75
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 9.0 to 11
42.7 to 64
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
2.5 to 3.3
Tungsten (W), % 14 to 16
0