Cu-OF
CW008AOxygen-free high-conductivity copper. 99.95% Cu min with max 0.001% O — eliminates hydrogen embrittlement risk during welding/brazing in reducing atmospheres. Used for vacuum electronics, waveguides, particle accelerator components, cryogenic systems, and applications where welding in H2-containing atmospheres is required.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C10200 | C10200 | REF |
| 🇪🇺 | EN | Europe | Cu-OF | CW008A | 100% |
| 🇬🇧 | BS | United Kingdom | C103 | — | 95% |
Sources: ASTM B152, EN 13601, BS 1172
Chemical composition comparison (wt%)
Side-by-side: Cu-OF (EN) (EN 13601) vs C103 (BS)
| Element | Cu-OF (EN) | C103 (BS) | Overlap |
|---|---|---|---|
| Cu | ≥ 99.95% | — | — |
| O | 0–0.001% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 200–260 | MPa |
| Yield Strength | 40–80 | MPa |
| Elongation | ≥ 33 | % |
| Elastic Modulus | ≥ 117 | GPa |
| Density | ≥ 8.94 | g/cm3 |
Compatibility verdict
Cu-OF and C103: 95% composition match
Close equivalents but NOT identical.
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