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R30012 Cobalt vs. R30016 Cobalt

Both R30012 cobalt and R30016 cobalt are cobalt alloys. Both are furnished in the annealed condition. They have a very high 95% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1770
1600
Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 1.0
8.4
Fatigue Strength, MPa 320
290
Poisson's Ratio 0.28
0.28
Rockwell C Hardness 48
37
Shear Modulus, GPa 86
85
Tensile Strength: Ultimate (UTS), MPa 830
1010
Tensile Strength: Yield (Proof), MPa 650
580

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1470
1360
Melting Onset (Solidus), °C 1280
1270
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.0

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.5
Embodied Carbon, kg CO2/kg material 8.3
7.7
Embodied Energy, MJ/kg 120
110
Embodied Water, L/kg 480
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
72
Resilience: Unit (Modulus of Resilience), kJ/m3 960
770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 3.8
3.9
Thermal Shock Resistance, points 23
24

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.9 to 1.4
Chromium (Cr), % 27 to 32
28 to 32
Cobalt (Co), % 47.5 to 64.1
49.6 to 66.9
Iron (Fe), % 0 to 3.0
0 to 3.0
Manganese (Mn), % 0
0.5 to 2.0
Molybdenum (Mo), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 0 to 3.0
0 to 3.0
Silicon (Si), % 0 to 2.0
0.2 to 2.0
Tungsten (W), % 7.5 to 9.5
3.5 to 5.5