Oxygen Free
Oxygen Free
Upward continuous casting technology provides top quality Oxygen Free copper wire rods with excellent conductivity, surface finish, ductility with homogenous grain structure and without harmful porosity. Oxygen Free High Conductivity (OFHC) copper rods are produced using LME Grade-A copper cathodes with 99.99% purity meeting international standards. These rods have a huge advantage when compared to traditional Electrolytic Touch Pitch (ETP) copper rods.
These are produced in 4 sizes viz 8, 12.5, 16 and 20 mm.
Comparison of OFHC and ETP copper rods
| Material | OFHC rods | ETP rods | |
|---|---|---|---|
| Chemical Composition | Cu min (%) | 99.99 | 99.90 |
| oxygen max (%) | 0.0010 | Around 0.400 | |
| Density (g/cm3) | 8.94 | 8.94-8.89 | |
| Gas absorption at high temp | Extremely low | Relatively low | |
| Microstructure homogeneity | Excellent | OK | |
| Electrical conductivity (%) | 102 | 101 | |
| Thermal conductivity (W / m-k) | 391 | 381 | |
| Deep drawing quality | Excellent | OK | |
| Oxide scale adhesion | Excellent | OK | |
| Resistance to H Embrittlement | Excellent | Poor | |