CONDUCTOR MATERIAL
OFC Copper (Oxygen-Free Copper)
Specifications
| Short name | OFC |
|---|---|
| Family | Copper |
| Purity | 99.95% (Cu-OFE) to 99.99% (4N) |
| Manufacturing process | Drawn from oxygen-shielded continuous-cast billet |
| Conductivity | 101 % IACS |
| Resistivity | 1.71e-8 Ω·m |
| Tensile strength | 210 MPa |
Overview
Oxygen-free copper per ASTM B49 — multi-crystal copper with oxygen content held below 10 ppm. Baseline conductor for audio cables; ~101% IACS conductivity. Cost-effective, widely available in any AWG.
Typical uses
- headphone cables
- interconnects
- speaker cables
- USB audio cables