Weight %. Values of EN 12164:2024 and EN 12165:2024 — the 2016 editions had 2.5–3.5% lead, so older mill certificates may still quote the 2.5% minimum. The lead lubricates the cut and breaks the chip; EN 12164 also lists CuZn38Pb4 (CW609N) with 3.5–4.2% Pb.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 57.0 | 59.0 |
| Zinc | Zn | Balance | |
| Lead | Pb | 2.2 | 3.5 |
| Iron | Fe | — | 0.30 |
| Nickel | Ni | — | 0.30 |
Bars show the range from the table: bar length at mid-range, zinc as the remainder.
EN 12164 condition values (minimum values). Condition names give the minimum tensile strength; hardness conditions (H…) are an alternative way to order. The EN 10204 3.1 certificate reports the values of the supplied bar. Physical properties are typical values; a range shows the spread of published data (reference: Kupferverband/DKI data sheet).
| Property | Condition | Value | Unit |
|---|---|---|---|
| Condition M | as manufactured | no limits | — |
| Tensile / Elongation | R360, Ø6–80 mm | ≥360 / ≥20 | MPa / % |
| Tensile / 0.2 % Proof / Elongation | R430, Ø2–40 mm | ≥430 / ≥220 / ≥10 | MPa / MPa / % |
| Tensile / 0.2 % Proof / Elongation | R500, Ø2–14 mm | ≥500 / ≥350 / ≥5 | MPa / MPa / % |
| Hardness | hardness conditions H090 / H110 / H135 | 90–125 / 110–160 / ≥135 | HB |
| Density | at 20 °C | 8.46–8.47 | g/cm³ |
| Melting Range | solidus–liquidus | 875–890 | °C |
| Thermal Conductivity | at 20 °C | 123 | W/(m·K) |
| Electrical Conductivity | at 20 °C | 25–28 | %IACS |
| Thermal Expansion | 20–300 °C | 20.9–21.4 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 97 | GPa |
| Machinability | reference grade of the scale | 100 | CW614N = 100 |
| Standard | Designation |
|---|---|
| EN (Europe) | CW614N / CuZn39Pb3 |
| UNS / ASTM — closest equivalent | C38500 — ASTM B455 (ranges overlap; C38500 lead from 2.5 %) |
| UNS — commonly cross-referenced | C36000 — Free-Cutting Brass, ASTM B16 |
| BS (UK legacy) | CZ121 |
| DIN (Germany) | CuZn39Pb3 / Ms58 |
| JIS (Japan) | C3604 (close — CW614N lies inside the C3604 range) |
| ISO | CuZn39Pb3 |
CW614N (CuZn39Pb3) is the standard free-machining brass of EN 12164, with 2.2–3.5% lead, commonly cross-referenced to the C36000 benchmark, rated ~100% machinability. The lead acts as a chip-breaker, making it the first choice for high-volume CNC and Swiss-turned parts — inserts, terminals, standoffs, valve components — where cycle time and surface finish matter most.
Yes, under RoHS Annex III Exemption 6(c), which permits up to 4% lead in copper alloys and is currently valid to 30 June 2027. For applications that must be lead-free — such as potable-water wetted parts under NSF/ANSI 372 in the US — consider CW724R or C6802 lead-free brass instead.
CW614N is optimised for bar turning: more lead and better chip-breaking, supplied as drawn rod per EN 12164. CW617N (CuZn40Pb2) has a higher zinc content that gives excellent hot-working, so it is the standard grade for hot-forged and stamped parts that are then machined. If the part is fully machined from rod, choose CW614N; if it starts as a forging, choose CW617N.
The closest UNS equivalent is C38500: its copper range contains CW614N’s, and its lead range (2.5–3.5%) covers CW614N except the 2.2–2.5% band of EN 12164:2024; since its 2026 edition ASTM B455 lists both. C36000 free-cutting brass (ASTM B16) is commonly cross-referenced for free-machining duty, and CZ121 is the former UK BS designation. Composition is specified in EN 12164; Brassland supplies parts with EN 10204 Type 3.1 mill certificates confirming the alloy lot.
Write the standard and designation together, for example “EN 12164 – CW614N / CuZn39Pb3 – R360”. State it whenever a minimum tensile strength or hardness matters — the table above lists the values per temper (R360, R430, R500). 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.
EN 12164 – CW614N / CuZn39Pb3 – R360. The closest UNS equivalent is C38500 (ASTM B455); C36000 — Free-Cutting Brass is commonly cross-referenced.Primary source: Kupferverband (DKI) — CuZn39Pb3 data sheet.
The EN free-machining benchmark, turned 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 CW614N 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.