Cu-ETP
CW004AElectrolytic Tough Pitch copper — the most widely used copper grade worldwide. 99.90% Cu min with controlled oxygen content (~0.02-0.04%). Electrical conductivity ≥100% IACS. Used for busbars, motor windings, transformer coils, electrical conductors, roofing, and radiators. Caution: hydrogen embrittlement risk in reducing atmospheres above 370°C.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C11000 | C11000 | REF |
| 🇪🇺 | EN | Europe | Cu-ETP | CW004A | 100% |
| 🇬🇧 | BS | United Kingdom | C101 | — | 98% |
| 🇯🇵 | JIS | Japan | C1100 | — | 98% |
Sources: ASTM B152, EN 13601, BS 1172, JIS H3100
Mechanical properties — Pro
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Hardness HB | ||
| Elastic Modulus | ||
| Density |
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