CuZn30
CW505L70/30 Brass — the "Cartridge Brass." Best cold formability of all brasses. Excellent deep drawing properties. Good corrosion resistance (better than higher-Zn brasses). Used for cartridge cases, radiator cores, lamp fittings, musical instruments, and decorative hardware. ≈ UNS C26000.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C26000 | C26000 | REF |
| 🇪🇺 | EN | Europe | CuZn30 | CW505L | 100% |
Sources: ASTM B36, EN 12163
Chemical composition comparison (wt%)
Side-by-side: CuZn30 (EN) (EN 12163) vs CuZn30 (EN) (EN 12163)
| Element | CuZn30 (EN) | CuZn30 (EN) | Overlap |
|---|---|---|---|
| Ni | 0–0.3% | 0–0.3% | OK |
| Cu | 69–71% | 69–71% | OK |
| Zn | — | — | — |
| Pb | 0–0.03% | 0–0.03% | OK |
| Fe | 0–0.05% | 0–0.05% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 300–370 | MPa |
| Yield Strength | 80–150 | MPa |
| Elongation | 55–65 | % |
| Hardness HB | 55–75 | HB |
| Elastic Modulus | ≥ 110 | GPa |
| Density | ≥ 8.53 | g/cm3 |
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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