Weight %. Slightly higher Cu and wider Pb window (max 3.7%) than EN 12164 leaded grades — check your spec when substituting CW614N (Pb max 3.5%).
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 60.0 | 63.0 | 61.5 |
| Zinc | Zn | Balance | ~35.4 | |
| Lead | Pb | 2.5 | 3.7 | 3.1 |
| Iron | Fe | — | 0.35 | 0.10 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength | O60 soft → H02 half-hard | 340–470 | MPa |
| Yield Strength | O60 soft → H02 half-hard | 125–310 | MPa |
| Elongation | H02 half-hard, typical | ~25 | % |
| Hardness | H02 half-hard, typical | ~78 | HRB |
| Machinability | vs C36000 = 100 | 100% | — |
| Elastic Modulus | — | ~97 | GPa |
| Density | — | 8.49 | g/cm³ |
| Thermal Conductivity | — | ~115 | W/(m·K) |
| Melting Range | solidus–liquidus | 885–900 | °C |
| Standard | Designation |
|---|---|
| UNS / ASTM (USA) | C36000 — ASTM B16 |
| EN — closest match | CW603N / CuZn36Pb3 |
| EN — commercial | CW614N / CuZn39Pb3 |
| BS (UK legacy) | CZ124 |
| JIS (Japan) | C3604 (close) |
| Trade name | 360 Brass / Free-Cutting Brass |
C36000 — also sold as 360 brass or free-cutting brass — is the standard North American free-machining brass per ASTM B16, with 60–63% copper and 2.5–3.7% lead. It is the alloy against which copper-alloy machinability is rated (100%), and the default choice for high-speed screw-machined parts such as fittings, connectors, fastener components, and sensor bodies.
The closest EN composition match is CW603N (CuZn36Pb3). In commercial cross-reference tables C36000 is also very commonly matched to CW614N (CuZn39Pb3), the standard European free-machining grade, which behaves near-identically in machining. The legacy British designation is CZ124, and JIS C3604 is a close Japanese equivalent.
C36000 relies on RoHS Annex III Exemption 6(c), which permits up to 4% lead in copper alloys (currently valid to 30 June 2027). It is not suitable for wetted parts in US potable-water systems, where NSF/ANSI 372 limits weighted lead content to 0.25% — specify a lead-free grade such as CW724R or C6802 instead.
Yes — parts are machined to your drawing and specification. Depending on bar availability we machine C36000 or the equivalent EN free-machining grades CW614N/CW603N; the exact grade and a Type 3.1 mill certificate (EN 10204) are confirmed at quotation. Send your drawing for a quote within 24 hours.
The US benchmark free-cutting brass, made to your drawing. ISO 9001:2015. Quote within 24 hours.
Request a QuoteComposition ranges, mechanical properties, machinability ratings and regulatory data on this page are cross-referenced against the publishers below. Tolerances and minimum values are taken from the relevant published standard at the time of writing — for procurement specification, always reference the current published edition.
Last reviewed: June 2026. EN/ISO/ASTM standards are updated periodically. This datasheet reflects the editions listed; for safety-critical or contract-critical applications, always verify against the current published edition of the standard. For project-specific deviations or supplier-specific composition windows, request a Type 3.1 mill certificate (EN 10204) with your order.
Brassland machines C36000 into brass turned parts and CNC machined components to your drawing in Jamnagar, India, including precision turned brass components on 28+ Swiss-type lathes, with an EN 10204 3.1 certificate on every shipment.