Cold Worked R30605 Cobalt vs. Ductile Hardened ASTM B540
Cold worked R30605 cobalt belongs to the cobalt alloys classification, while ductile hardened ASTM B540 belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is cold worked R30605 cobalt and the bottom bar is ductile hardened ASTM B540.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 110 |
| Elongation at Break, % | 34 | |
| 9.1 |
| Fatigue Strength, MPa | 590 | |
| 350 |
| Poisson's Ratio | 0.29 | |
| 0.38 |
| Shear Modulus, GPa | 81 | |
| 39 |
| Tensile Strength: Ultimate (UTS), MPa | 1900 | |
| 1170 |
| Tensile Strength: Yield (Proof), MPa | 1600 | |
| 930 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 140 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1220 |
| Melting Onset (Solidus), °C | 1330 | |
| 1020 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 240 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 5.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 3.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 13 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 21 | |
| 12 |
| Strength to Weight: Axial, points | 55 | |
| 26 |
| Strength to Weight: Bending, points | 36 | |
| 19 |
| Thermal Shock Resistance, points | 52 | |
| 58 |
Alloy Composition
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| Carbon (C), % | 0.050 to 0.15 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 46.4 to 57 | |
| 0 |
| Copper (Cu), % | 0 | |
| 13.5 to 14.5 |
| Gold (Au), % | 0 | |
| 9.5 to 10.5 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 0 |
| Palladium (Pd), % | 0 | |
| 34 to 36 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Platinum (Pt), % | 0 | |
| 9.5 to 10.5 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 |
| Silver (Ag), % | 0 | |
| 29 to 31 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.8 to 1.2 |
| Residuals, % | 0 | |
| 0 to 0.3 |