CuSn10
CW480KHigh-tin phosphor bronze with 10% Sn. Higher strength and wear resistance than CuSn8 but better ductility than CuSn12. Used for bearings, worm gears, thrust washers, valve guides, and marine hardware. Available as wrought and cast forms.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C52400 (wrought) | C52400 | REF |
| 🇪🇺 | EN | Europe | CuSn10 | CW480K | 100% |
Sources: ASTM B103, EN 1652
Chemical composition comparison (wt%)
Side-by-side: CuSn10 (EN) (EN 1652) vs CuSn10 (EN) (EN 1652)
| Element | CuSn10 (EN) | CuSn10 (EN) | Overlap |
|---|---|---|---|
| P | 0–0.4% | 0–0.4% | OK |
| Cu | — | — | — |
| Sn | 9–11% | 9–11% | OK |
| Pb | 0–0.02% | 0–0.02% | OK |
| Zn | 0–0.2% | 0–0.2% | OK |
Mechanical properties
As Cast
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 250–320 | MPa |
| Yield Strength | 130–160 | MPa |
| Elongation | 5–12 | % |
| Hardness HB | 80–120 | HB |
| Elastic Modulus | ≥ 105 | GPa |
| Density | ≥ 8.78 | g/cm3 |
Related materials
CuZn37
2.0321Lead-free alpha/alpha+beta brass (63% Cu, 37% Zn). Compromise between cold formability (CuZn35) and hot formability (CuZn40). The most widely used unleaded brass. Used for cartridge cases, radiator cores, lamp components, plumbing fixtures, and decorative hardware.
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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