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.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | C27200 | C27200 | REF |
| 🇪🇺 | EN | Europe | CuZn37 / CW508L | 2.0321 | 100% |
| 🇯🇵 | JIS | Japan | C2720 | — | 95% |
| 🇬🇧 | BS | United Kingdom | CZ107 (old) | — | 95% |
Sources: ASTM B36, EN 12167, JIS H3100, BS 2870
Mechanical properties
Compatibility verdict
CuZn37 and C2720: 95% 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.
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.
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