CuZn30
2.0265Alpha brass with 30% Zn — excellent cold formability (deep drawing, spinning, stamping) and good corrosion resistance. Known as Cartridge Brass (C26000). The golden-yellow color makes it popular for decorative applications. Not susceptible to dezincification (unlike higher-Zn brasses). Used for cartridge cases, radiator cores, lamp fittings, drawn tubes, electrical sockets, musical instruments and decorative hardware.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | C26000 | C26000 | REF |
| 🇪🇺 | EN | Europe | CW505L | — | 100% |
Sources: ASTM B36, EN 12163
Chemical composition comparison (wt%)
Side-by-side: CuZn30 (EN) (EN 12163) vs CW505L (EN) (EN 12163)
| Element | CuZn30 (EN) | CW505L (EN) | Overlap |
|---|---|---|---|
| Cu | 69–71% | 69–71% | OK |
| Zn | — | — | — |
| Pb | ≤ 0.05% | ≤ 0.05% | OK |
| Fe | ≤ 0.05% | ≤ 0.05% | OK |
Mechanical properties
Soft O
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 290–370 | MPa |
| Yield Strength Rp0.2 | ≥ 80 | MPa |
| Elongation A | ≥ 55 | % |
Hard H
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 490 | MPa |
General
| Property | Value | Unit |
|---|---|---|
| Density | 8.53 | g/cm³ |
| Electrical Conductivity | 27 | % |
Compatibility verdict
CuZn30 and CW505L: 100% composition match
Close equivalents but NOT identical.
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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