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C36000 Brass Forgings | Free-Cutting Brass | UNS C36000 CDA 360
C36000 Brass Forgings | Free-Cutting Brass | UNS C36000 (CDA 360)
C36000 (UNS C36000, CDA 360) — universally recognized as the benchmark “Free-Cutting Brass” with a machinability index of 100% — is used for forged blanks and open-die forgings where maximum CNC machinability is the primary requirement. While C36000 is primarily a screw-machine alloy (bar stock), it is also produced as forged blanks and simple open-die forgings for components requiring superior surface finish and tightest dimensional tolerances after machining. With 35.5% zinc and 2.5–3.7% lead, C36000 produces the shortest, most fragmented chips of any copper alloy, enabling high-speed CNC turning at cutting speeds of 100–200 m/min with minimal tool wear. Electrical Accessories India supplies C36000 forged blanks and CNC-machined precision components to instrument, valve, and electronics markets globally.
C36000 Chemical Composition
| Element | Cu | Pb | Fe | Zn |
|---|---|---|---|---|
| C36000 (ASTM B16) | 60.0–63.0% | 2.5–3.7% | max 0.35% | Remainder |
| CW614N (EN) | 60.0–63.0% | 2.5–3.5% | max 0.30% | Remainder |
International Equivalents – C36000 / Free-Cutting Brass
| Standard | Designation | Region |
|---|---|---|
| ASTM B16 / B453 | C36000 | USA |
| EN 12164 (BS EN) | CW614N (CuZn39Pb3) | Europe / UK |
| IS 319 Grade 1 | Free-Cutting Brass | India |
| DIN 17660 | CuZn39Pb3 | Germany |
| JIS H3250 | C3604 | Japan |
| BS 2874 | CZ121 | United Kingdom |
Mechanical Properties – C36000
| Property | Value |
|---|---|
| Tensile Strength (UTS) | 340–420 MPa (49–61 ksi) |
| Yield Strength (0.2%) | 125–185 MPa |
| Elongation | 25–35% |
| Hardness | 80–120 HRB |
| Machinability Index | 100% (reference alloy) |
| Density | 8.49 g/cm³ |
| Forging Temperature | 600–700°C (open die) |
Applications of C36000 Forged Blanks
C36000 forged blanks are produced for applications requiring maximum machinability: precision valve stems and bonnets; instrument body blanks; small manifold blocks; gauge connection bodies; pneumatic valve internals; electrical connector bodies; precision metering device bodies; and medical gas equipment components. C36000 is NOT generally used for heavy pressure-rated valve bodies (C37700/CW617N is preferred for those); it is the alloy of choice when CNC machining speed and surface finish quality outweigh forging complexity considerations.
- Valve stem and bonnet blanks (CNC-turned from C36000 forged rounds)
- Instrument valve bodies: needle valves, metering valves, gauge valves
- Pneumatic valve internals: spools, seats, poppets
- Electrical: terminal bodies, connector inserts, bus bar connectors
- Precision manifold blocks for instrumentation
- Medical gas valve bodies (where lead content is acceptable per specification)
Pricing
Indicative Price: US$ 13.30 per kilogram (CIF). For NSF 61 / lead-free applications, specify C69300 ECO Brass or C87850 lead-free alloy. Contact us for quotation.
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See also: Brass Forging Parts Overview | CW614N Free-Cutting Brass (EN) | CW617N Hot Forging Brass | C37700 ASTM Brass