CuFe2P
CW107CPrecipitation-hardened copper-iron alloy — THE semiconductor leadframe material since 1964. Fe precipitates give UTS up to 580 MPa while maintaining 60-65% IACS electrical conductivity. Resists softening to 350°C (critical for IC packaging). Also used for automotive connectors, pin grid arrays (PGA), and terminals. Trade names: Wieland K65, Aurubis PNA212.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C19400 | C19400 | REF |
| 🇪🇺 | EN | Europe | CuFe2P / CW107C | CW107C | 100% |
| 🇯🇵 | JIS | Japan | C1940 | — | 100% |
Sources: ASTM B888, EN 1758, JIS H3100
Chemical composition comparison (wt%)
Side-by-side: CuFe2P (EN 1758) vs CuFe2P / CW107C (EN) (EN 1758)
| Element | CuFe2P (EN 1758) | CuFe2P / CW107C (EN) | Overlap |
|---|---|---|---|
| P | — | 0.015–0.15% | — |
| Cu | — | — | — |
Mechanical properties
Compatibility verdict
CuFe2P and CuFe2P / CW107C: 100% composition match
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