Il Cromo-Cobalto è una superlega caratterizzata da eccellenti proprietà meccaniche (resistenza, durezza, ecc.), resistenza alla corrosione ed alle alte temperature. Tali leghe sono comunemente utilizzate in ambito biomedicale e dentale, innesti medici ed anche per applicazioni ingegneristiche ad alta temperatura come i motori aeronautici. I pezzi costruiti con questo materiale sono privi di nichel (<0,1%), sterilizzabili ed adatti alle applicazioni biomediche. Sono caratterizzati da una struttura sottile ed uniforme.
| Technical Data | ||
| Typical part accuracy (Quote<150mm) | - - - - - - - | ± 0.2 – 0.3 mm |
| Typical part accuracy (Quote>=150mm) | - - - - - - - | ± 0.05 every 25mm |
| Surface roughness as built | - - - - - - - | Ra 6 - 7 μm |
| Surface Roughness (after machining) | - - - - - - - | Ra < 1.6µm |
| Physical and Chemical properties | Chemical composition |
Co (60 - 65 %) Cr (26 - 30 %) Mo (5 - 7 % ) Si (≤ 1.0 %) Mn (≤ 1.0 %) Fe (≤ 0.75 -%) C (≤ 0.16 %) Ni (≤ 0.10 %) |
| Physical properties | Relative density | Approx. 99,99 % |
| Density | 8,30 g/cm3 |
| Heat Treatment - Stress Relief | Temperature | Time | Atmosphere |
| 0° – 1150° | 3 | Vacuum | |
| 1150° | 6 | Vacuum | |
| 1150° - 0° | - | Vacuum |
| Thermal properties of parts | Test Method | |
| Coefficient of thermal expansion over 20-600°C (68-1080 °F) | - - - - - - - | 14 x 10-6 m/m °C |
| Thermal conductivity at 20 °C (68 °F) | - - - - - - - | 13 W/m °C |
| Thermal conductivity at 100 °C (212 °F) | - - - - - - - | 14 W/m °C |
| Thermal conductivity at 200 °C (392 °F) | - - - - - - - | 15 W/m °C |
| Thermal conductivity at 300 °C (572 °F) | - - - - - - - | 16 W/m °C |
| Maximum operating temperature | - - - - - - - | 550 °C (1022 °F) |
| Mechanical properties | Test Method | As Built | Heat Treated |
| Tensile strength |
ISO 6892-1:2009(B) Annex D |
1300 ± 100 MPa | 1100 ± 100 MPa |
| Yield strength (Rp 0.2 %) |
ISO 6892-1:2009(B) Annex D |
1000 ± 100 MPa | 600 ± 50 MPa |
| Elongation at break |
ISO 6892-1:2009(B) Annex D |
Approx (15 ± 4) % | Approx (15 ± 4) % |
| Young’s Modulus | - | 200 ± 20 GPa | 200 ± 20 GPa |
| Hardness | DIN EN ISO 6508-1 | 35 ÷ 40 HRC | - |
| Thermal properties | |||
| Thermal conductivity | 15 ± 3 W/m°C | ||
| Max. Operating Temp. | Approx. 1150°C |
| Other | Available Colors | |
|
The information presented are typical values intended for reference and comparison purposes only. They should not be used for design specifications or quality control purposes.
End-use material performance can be impacted (+/-) by, but not limited to, part design, end-use conditions, etc. Actual values will vary with build conditions.
Product specifications are subject to change without notice.
The performance characteristics of these materials may vary according to application, operating conditions, or end use. Each user is responsible for determining that the material is safe, lawful and technical suitable for the intended laws and regulations. Zare makes no warranties of any kind, express or implied, including, but not limited to, the warranties of merchantability, fitness for a particular use, or warranty against patent infringement. All Trademarks included in this document are property of the respective owner.