CuSn8P
CW453KHigh-tin phosphor bronze — Sn 7.5-8.5% + P 0.01-0.4%. Higher Sn than CuSn6 = higher strength (UTS 600-800 MPa spring-hard) and better wear resistance. THE spring connector and bearing bronze. Used for precision springs, connectors, switch parts, sliding bearings, and membranes. Excellent fatigue resistance. Also known as PB102 (BS) / C52100.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C52100 | C52100 | REF |
| 🇪🇺 | EN | Europe | CuSn8 / CW453K | CW453K | 100% |
Sources: ASTM B103, EN 1654
Chemical composition comparison (wt%)
Side-by-side: CuSn8P (EN 1654) vs CuSn8 / CW453K (EN) (EN 1654)
| Element | CuSn8P (EN 1654) | CuSn8 / CW453K (EN) | Overlap |
|---|---|---|---|
| P | — | 0.01–0.4% | — |
| Cu | — | — | — |
Mechanical properties
Compatibility verdict
CuSn8P and CuSn8 / CW453K: 100% composition match
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