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R30006 Cobalt vs. R30816 Cobalt

Both R30006 cobalt and R30816 cobalt are cobalt alloys. They have 73% of their average alloy composition in common. There are 25 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 R30006 cobalt and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 1.0
23
Fatigue Strength, MPa 260
250
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 85
81
Tensile Strength: Ultimate (UTS), MPa 900
1020
Tensile Strength: Yield (Proof), MPa 540
460

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1400
1540
Melting Onset (Solidus), °C 1290
1460
Specific Heat Capacity, J/kg-K 450
420
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.1
Embodied Carbon, kg CO2/kg material 7.8
20
Embodied Energy, MJ/kg 110
320
Embodied Water, L/kg 500
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
190
Resilience: Unit (Modulus of Resilience), kJ/m3 670
510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 29
31
Strength to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.9
3.3
Thermal Shock Resistance, points 26
28

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.32 to 0.42
Chromium (Cr), % 27 to 32
19 to 21
Cobalt (Co), % 48.6 to 68.1
40 to 49.8
Iron (Fe), % 0 to 3.0
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0 to 1.0
3.5 to 4.5
Nickel (Ni), % 0 to 3.0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 4.0 to 6.0
3.5 to 4.5