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Nickel 908 vs. R30605 Cobalt

Nickel 908 belongs to the nickel alloys classification, while R30605 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 nickel 908 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 11
34
Fatigue Strength, MPa 450
260 to 590
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 70
81
Tensile Strength: Ultimate (UTS), MPa 1340
1130 to 1900
Tensile Strength: Yield (Proof), MPa 930
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1430
1410
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 460
410
Thermal Conductivity, W/m-K 11
9.6
Thermal Expansion, µm/m-K 8.6
12

Otherwise Unclassified Properties

Density, g/cm3 8.3
9.6
Embodied Carbon, kg CO2/kg material 9.3
9.8
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 170
450

Common Calculations

Stiffness to Weight: Axial, points 12
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 45
33 to 55
Strength to Weight: Bending, points 33
25 to 36
Thermal Diffusivity, mm2/s 2.9
2.5
Thermal Shock Resistance, points 61
31 to 52

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0 to 0.012
0
Carbon (C), % 0 to 0.030
0.050 to 0.15
Chromium (Cr), % 3.8 to 4.5
19 to 21
Cobalt (Co), % 0 to 0.5
46.4 to 57
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 35.6 to 44.6
0 to 3.0
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Nickel (Ni), % 47 to 51
9.0 to 11
Niobium (Nb), % 2.7 to 3.3
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 1.2 to 1.8
0
Tungsten (W), % 0
14 to 16