CuZn28
CW505LSingle-phase alpha brass — Cu 72%, Zn 28%. Excellent cold formability (deep drawing, spinning, bending). Better corrosion resistance than higher-Zn brasses (CuZn37, CuZn40). Used for cartridge cases (hence "cartridge brass"), musical instruments, lamp fittings, radiator cores, and decorative hardware. Good dezincification resistance.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C26000 (approximate) | C26000 | REF |
| 🇪🇺 | EN | Europe | CuZn28 / CW505L | CW505L | 100% |
Sources: ASTM B36, EN 1652
Chemical composition comparison (wt%)
Side-by-side: CuZn28 (EN 1652) vs CuZn28 / CW505L (EN) (EN 1652)
| Element | CuZn28 (EN 1652) | CuZn28 / CW505L (EN) | Overlap |
|---|---|---|---|
| Cu | — | 71–73% | — |
| Zn | — | — | — |
Mechanical properties
Compatibility verdict
CuZn28 and CuZn28 / CW505L: 100% composition match
Related materials
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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.
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