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R30816 Cobalt vs. G-CoCr28 Cobalt

Both R30816 cobalt and G-CoCr28 cobalt are cobalt alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
6.7
Fatigue Strength, MPa 250
130
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
83
Tensile Strength: Ultimate (UTS), MPa 1020
560
Tensile Strength: Yield (Proof), MPa 460
260

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1540
1330
Melting Onset (Solidus), °C 1460
1270
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
8.5
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.1
Embodied Carbon, kg CO2/kg material 20
6.2
Embodied Energy, MJ/kg 320
84
Embodied Water, L/kg 440
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
31
Resilience: Unit (Modulus of Resilience), kJ/m3 510
160
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
19
Strength to Weight: Bending, points 25
19
Thermal Diffusivity, mm2/s 3.3
2.2
Thermal Shock Resistance, points 28
14

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.050 to 0.25
Chromium (Cr), % 19 to 21
27 to 30
Cobalt (Co), % 40 to 49.8
48 to 52
Iron (Fe), % 0 to 5.0
9.7 to 24.5
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 3.5 to 4.5
0 to 0.5
Nickel (Ni), % 19 to 21
0 to 4.0
Niobium (Nb), % 3.5 to 4.5
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0