Mass %, EN 12164. Zinc is the remainder.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 60.0 | 62.0 |
| Lead | Pb | 2.5 | 3.5 |
| Iron | Fe | — | 0.30 |
| Nickel | Ni | — | 0.30 |
| Tin | Sn | — | 0.20 |
| Aluminium | Al | — | 0.05 |
| Others (total) | — | — | 0.20 |
| Zinc | Zn | Balance | |
Condition R400 to EN 12164 (minimum values); for other conditions the mill certificate states the values of the supplied bar. Physical properties are typical values; a range shows the spread of published data (reference: Copper Development Association, UNS equivalent C36000).
| Property | Condition | Value | Unit |
|---|---|---|---|
| Condition M | as manufactured | no limits | — |
| Tensile Strength | R400, Ø2–25 mm | ≥400 | N/mm² (MPa) |
| Elongation | R400 | ≥12 | % |
| Density | at 20 °C | 8.50 | g/cm³ |
| Melting Range | solidus–liquidus | 870–900 | °C |
| Electrical Conductivity | at 20 °C | 22–26 | %IACS |
| Thermal Conductivity | at 20 °C | 100–120 | W/(m·K) |
| Thermal Expansion | 20–300 °C | 20.5–20.6 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 97–102 | GPa |
| Machinability | as its UNS equivalent C36000 (CDA, C36000 = 100) | ≈100 | index |
| Standard | Designation |
|---|---|
| EN (Europe) | CW603N / CuZn36Pb3 — EN 12164, 12166, 12167, 12168, 12449 |
| DIN (Germany, legacy) | 2.0375 / CuZn36Pb3 |
| UNS / ASTM — equivalent | C36000 — ASTM B16 (Cu 60–63, Pb 2.5–3.0) |
| BS (UK legacy) | CZ124 |
| EN — lower-copper grade | CW614N / CuZn39Pb3 (Cu 57–59, Pb 2.2–3.5) |
| GOST (Russia) — related | ЛС63-3 (Cu 62–65, Pb 2.4–3.0; GOST 15527) |
| JIS (Japan) — overlapping | C3601 / C3602 (Cu 59–63, Pb 1.8–3.7; JIS H3250) |
CW603N (CuZn36Pb3, DIN material number 2.0375) is a leaded free-cutting brass: 60.0–62.0 % copper, 2.5–3.5 % lead, up to 0.30 % iron, 0.30 % nickel, 0.20 % tin and 0.05 % aluminium, other elements up to 0.20 % in total, balance zinc. It is listed in EN 12164 for free-machining rod and in the EN standards for wire, profiles, hollow rod and tubes.
They are equivalents, with one limit to check. CW603N’s copper range (60–62 %) lies inside the C36000 range (60–63 %), and both are free-cutting brasses with at least 2.5 % lead — but CW603N allows up to 3.5 % lead where C36000 stops at 3.0 %. A CW603N heat with more than 3.0 % lead is therefore not C36000; compare the EN 10204 3.1 analysis with the grade on your drawing.
Both are EN free-cutting brasses with about 3 % lead: CW603N 2.5–3.5 %, CW614N 2.2–3.5 % (EN 12164:2024). CW603N has 60–62 % copper, CW614N 57–59 %; the EN limits for iron (0.30 %), nickel and aluminium are the same, while CW603N allows 0.20 % tin against 0.30 % for CW614N.
EN standards define its properties by condition: M is as manufactured, without mechanical requirements; R conditions give a minimum tensile strength — for example R400, with at least 400 N/mm² and 12 % elongation. For the other R conditions, the mill certificate states the values of the bar supplied.
For RoHS, its 2.5–3.5 % lead is covered by Annex III exemption 6(c), which allows up to 4 % lead in copper alloys and is currently valid to 30 June 2027. For drinking-water contact it is not suitable: NSF/ANSI 372 limits the weighted lead content of wetted surfaces to 0.25 %. Lead-free options on this site include the silicon brass C69300 / CW724R and the bismuth brass C6802.
Yes — turned and milled to your drawing in Jamnagar. Whether bar certified to CW603N is available for your quantity is confirmed at quotation; every shipment carries an EN 10204 3.1 mill certificate. Series lead time is 3–5 weeks from the approved drawing.
EN 12164 – CW603N / CuZn36Pb3 – R400. The UNS equivalent is C36000 (ASTM B16).Primary source: EN 12164 — Copper and copper alloys: rod for free machining purposes (CEN).
Free-cutting brass parts turned, milled and inspected in Jamnagar. ISO 9001:2015. Quote within 24 hours.
Request a QuoteComposition limits and condition values: EN 12164. UNS cross-reference and physical data: Copper Development Association. For procurement specification, always reference the current published edition of the standard.
Last reviewed: September 2026. Composition limits and condition values are those of EN 12164; physical values are typical and not specification limits. For safety-critical or contract-critical applications, 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 CW603N 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.