CuZn20
CW502LGilding brass / 80-20 brass — the highest-Cu common brass. Excellent cold formability (best of all brasses), good corrosion resistance, and attractive golden color. Used for architectural trim, bullet jackets, jewelry, zippers, coins, and decorative hardware. ≈ UNS C24000.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C24000 (Low Brass) | C24000 | REF |
| 🇪🇺 | EN | Europe | CuZn20 | CW502L | 100% |
Sources: ASTM B36, EN 12163
Chemical composition comparison (wt%)
Side-by-side: CuZn20 (EN 12163) vs CuZn20 (EN) (EN 12163)
| Element | CuZn20 (EN 12163) | CuZn20 (EN) | Overlap |
|---|---|---|---|
| Cu | — | 79–81% | — |
| Zn | — | — | — |
Mechanical properties
Compatibility verdict
CuZn20 and CuZn20: 100% composition match
Related materials
CuZn39Pb3
2.0401The most widely used free-cutting brass (machinability index 100%). Excellent for high-speed automatic lathe work. Used for turned parts, faucets, valves, fittings, screws, nuts, electrical connectors, and watch components. Also known as MS58.
CuSn8
2.1030Phosphor bronze with 8% tin. High mechanical strength, excellent wear resistance, good corrosion resistance (especially seawater). Self-lubricating sliding properties. Used for heavy-duty bearings, gears, worm wheels, springs, sliding elements, and connectors.
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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