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) (EN 1758) vs CuFe2P / CW107C (EN) (EN 1758)
| Element | CuFe2P (EN) | CuFe2P / CW107C (EN) | Overlap |
|---|---|---|---|
| P | 0.015–0.15% | 0.015–0.15% | OK |
| Cu | — | — | — |
| Fe | 2.1–2.6% | 2.1–2.6% | OK |
| Zn | 0.05–0.2% | 0.05–0.2% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 300–340 | MPa |
| Yield Strength | 150–200 | MPa |
| Elongation | 25–35 | % |
| Density | ≥ 8.94 | g/cm3 |
R470 Hard
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 440–530 | MPa |
Compatibility verdict
CuFe2P and CuFe2P / CW107C: 100% composition match
Close equivalents but NOT identical.
Related materials
CuZn37
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CuZn36Pb3
CW603NFree-cutting leaded brass — the benchmark for non-ferrous machinability (rated 100%). Lead particles act as chip breakers for excellent surface finish. Used for screw machine parts, fittings, valves, watch components, precision mechanics, and electrical connectors. Old DIN number 2.0375.
CuSn6
CW452KPhosphor bronze with 6% tin — better cold formability than CuSn8 at slightly lower strength. Excellent spring properties and fatigue resistance. Used for electrical connectors, spring contacts, switch parts, bellows, bourdon tubes, and precision springs.
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