Chromium Copper Rod
Introduction
Chromium copper rod at room temperature and high temperature (400 ° С) with high strength and hardness, it is a very good electrical and thermal conductivity material. Chromium copper is also with good wear and friction-reducing, after age hardening treatment, strength, hardness, electrical conductivity and thermal resistance are significantly improved, easy welding and brazing, with good corrosion resistance in the atmosphere and fresh water high temperature oxidation resistance, can withstand the pressure of working in a very good cold and hot states, but its drawback is stronger sensitivity gap, resulting in stress concentration in gaps and sharp corners, prone to mechanical damage.
Properties
| Material | CrCu-98 | CrCu-75 | CrCu-70 | CrCu-57 |
| Cr (%) | 2 | 25 | 30 | 43 |
| Cu (%) | 98 | 75 | 70 | 57 |
| O [ppm] | 150 | 650 | 675 | 700 |
| He [ppm] | 5 | 5 | 5 | 10 |
| N [ppm] | 15 | 100 | 105 | 110 |
| Density [g/cm3] | 8,70 | 8,05 | 7,90 | 7,60 |
| Hardness [HV30] | 110 | 70 | 75 | 85 |
| Conductivity [m/Ωmm2] | 48 | 31 | 28 | 21 |
Application
Chromium copper rod is widely used in the following area.
Welding electrode: Chromium copper by heat treatment and cold combination of methods to ensure the performance, it can get the best mechanical and physical properties, and it is used for general welding electrode.
EDM electrode: Chromium copper with good thermal conductivity, high hardness and wear antiknock, it is used as EDM electrode has a good standing, playing sheet bend and finish advantages.