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R30816 Cobalt vs. R30003 Cobalt

Both R30816 cobalt and R30003 cobalt are cobalt alloys. They have 84% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
10 to 73
Fatigue Strength, MPa 250
320 to 560
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
83
Tensile Strength: Ultimate (UTS), MPa 1020
970 to 1720
Tensile Strength: Yield (Proof), MPa 460
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Melting Completion (Liquidus), °C 1540
1400
Melting Onset (Solidus), °C 1460
1440
Specific Heat Capacity, J/kg-K 420
450
Thermal Conductivity, W/m-K 13
13
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.4
Embodied Carbon, kg CO2/kg material 20
8.0
Embodied Energy, MJ/kg 320
110
Embodied Water, L/kg 440
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 510
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
32 to 57
Strength to Weight: Bending, points 25
26 to 38
Thermal Diffusivity, mm2/s 3.3
3.3
Thermal Shock Resistance, points 28
26 to 45

Alloy Composition

Boron (B), % 0
0 to 0.1
Carbon (C), % 0.32 to 0.42
0 to 0.15
Chromium (Cr), % 19 to 21
19 to 21
Cobalt (Co), % 40 to 49.8
39 to 41
Iron (Fe), % 0 to 5.0
10 to 20.5
Manganese (Mn), % 1.0 to 2.0
1.5 to 2.5
Molybdenum (Mo), % 3.5 to 4.5
6.0 to 8.0
Nickel (Ni), % 19 to 21
14 to 16
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0