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R30816 Cobalt vs. R30016 Cobalt

Both R30816 cobalt and R30016 cobalt are cobalt alloys. They have 75% of their average alloy composition in common. There are 26 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 R30816 cobalt and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 23
8.4
Fatigue Strength, MPa 250
290
Poisson's Ratio 0.3
0.28
Reduction in Area, % 22
8.0
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 1020
1010
Tensile Strength: Yield (Proof), MPa 460
580

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1540
1360
Melting Onset (Solidus), °C 1460
1270
Specific Heat Capacity, J/kg-K 420
450
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.5
Embodied Carbon, kg CO2/kg material 20
7.7
Embodied Energy, MJ/kg 320
110
Embodied Water, L/kg 440
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
72
Resilience: Unit (Modulus of Resilience), kJ/m3 510
770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
33
Strength to Weight: Bending, points 25
26
Thermal Diffusivity, mm2/s 3.3
3.9
Thermal Shock Resistance, points 28
24

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.9 to 1.4
Chromium (Cr), % 19 to 21
28 to 32
Cobalt (Co), % 40 to 49.8
49.6 to 66.9
Iron (Fe), % 0 to 5.0
0 to 3.0
Manganese (Mn), % 1.0 to 2.0
0.5 to 2.0
Molybdenum (Mo), % 3.5 to 4.5
0 to 1.5
Nickel (Ni), % 19 to 21
0 to 3.0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.2 to 2.0
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
3.5 to 5.5