Weight %. Higher copper (60–63%) and a narrower lead window (2.5–3.0%) than EN 12164 CW614N (Cu 57–59%, Pb 2.2–3.5%) — check your spec when substituting.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 60.0 | 63.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 2.5 | 3.0 |
| Iron | Fe | — | 0.35 |
Bars show the range from the table: bar length at mid-range, zinc as the remainder.
Typical rod values by section size and cold work — strength falls as the section grows. The mill certificate reports the values of the supplied rod.
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile / Yield (0.5 % ext.) / Elongation | rod O61 (annealed), 1 in (25 mm) | ~338 / ~124 / ~53 | MPa / MPa / % |
| Tensile / Yield (0.5 % ext.) / Elongation | rod H02 (half hard), 1 in (25 mm), 20 % cold work | ~400 / ~310 / ~25 | MPa / MPa / % |
| Tensile / Yield (0.5 % ext.) / Elongation | rod H02, 0.24 in (6 mm), 25 % cold work | ~469 / ~359 / ~18 | MPa / MPa / % |
| Hardness | rod H02, 1.5 in (38 mm) | ~65 | HRB |
| Density | at 20 °C | 8.50 | g/cm³ |
| Electrical Conductivity | at 20 °C | 26 | %IACS |
| Thermal Conductivity | at 20 °C | 116 | W/(m·K) |
| Thermal Expansion | CDA, 20–300 °C | 20.5 | ×10⁻⁶/K |
| Melting Range | solidus–liquidus | 888–899 | °C |
| Modulus of Elasticity | CDA | 97 | GPa |
| Machinability | CDA reference alloy (C36000 = 100) | 100 | index |
| Standard | Designation |
|---|---|
| UNS / ASTM (USA) | C36000 — ASTM B16 |
| EN — equivalent | CW603N / CuZn36Pb3 |
| EN — commercial | CW614N / CuZn39Pb3 |
| BS (UK legacy) | CZ124 |
| JIS (Japan) | C3604 (close; overlaps at 60–61 % Cu) |
| 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 2.5–3.0% 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 EN equivalent is CW603N (CuZn36Pb3), whose copper range lies inside C36000’s; its lead window reaches 3.5 % where C36000 stops at 3.0 %. 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 EN free-machining grades CW603N (its equivalent) or CW614N (commonly cross-referenced); 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.
Write the standard and designation together, for example “ASTM B16 – C36000 – H02”. State it whenever a minimum tensile strength or hardness matters — the table above lists the values per temper (O61, H02). Tolerances follow ISO 2768-m unless the title block says otherwise.
The mill’s EN 10204 Type 3.1 inspection certificate for the alloy lot reports the measured chemical composition and mechanical test results. Brassland adds a Certificate of Conformity for the order and RoHS and REACH declarations at no charge; PPAP Level 1–3 packages are available for OEM qualification.
ASTM B16 – C36000 – H02. The EN equivalent is CW603N / CuZn36Pb3.Primary source: Copper Development Association C36000.
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: September 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.