Mass %, EN 12164. Zinc is the remainder.
| Element | Symbol | Min % | Max % |
|---|---|---|---|
| Copper | Cu | 57.0 | 59.0 |
| Manganese | Mn | 1.5 | 3.0 |
| Aluminium | Al | 1.3 | 2.3 |
| Silicon | Si | 0.3 | 1.3 |
| Lead | Pb | 0.2 | 0.8 |
| Iron | Fe | — | 1.0 |
| Nickel | Ni | — | 1.0 |
| Tin | Sn | — | 0.40 |
| Others (total) | — | — | 0.30 |
| Zinc | Zn | Balance | |
Condition R540 to EN 12164 (minimum values, Ø 6–80 mm). Stronger conditions: R590 (Ø 6–50 mm), R570 (Ø over 50 to 80 mm), R640 (Ø 6–15 mm) and R620 (Ø over 15 to 50 mm) — the number is the minimum tensile strength in N/mm². 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 Strength | R540 | ≥540 | N/mm² (MPa) |
| 0.2 % Proof Stress | R540 | ≥280 | N/mm² (MPa) |
| Elongation | R540 | ≥15 | % |
| Density | at 20 °C | 8.12 | g/cm³ |
| Melting Range | solidus–liquidus | 865–910 | °C |
| Electrical Conductivity | at 20 °C (7.8–8.0 MS/m) | 13–14 | %IACS |
| Thermal Conductivity | at 20 °C | 63 | W/(m·K) |
| Thermal Expansion | 0–300 °C | 20.4–20.6 | ×10⁻⁶/K |
| Modulus of Elasticity | at 20 °C | 93–110 | GPa |
| Machinability | CDA rating of the UNS counterpart C67420 (C36000 = 100); Kupferverband/DKI index 40 | ≈50 | index |
| Standard | Designation |
|---|---|
| EN (Europe) | CW713R / CuZn37Mn3Al2PbSi — EN 12164, 12165, 12167, 12168, 12449, 12420 |
| DIN (Germany, legacy) | 2.0550 / CuZn40Al2 |
| UNS (USA) — counterpart | C67420 — CDA (Cu 57.0–58.5, Mn 1.5–2.5, Al 1.0–2.0, Si 0.25–0.7, Pb 0.25–0.8) |
| Classification | Complex copper-zinc alloy (EN 12164 alloy group) |
CW713R (CuZn37Mn3Al2PbSi, DIN material number 2.0550) is a high-tensile complex brass: 57.0–59.0 % copper, 1.5–3.0 % manganese, 1.3–2.3 % aluminium, 0.3–1.3 % silicon and 0.2–0.8 % lead, with iron and nickel up to 1.0 % each and tin up to 0.40 %, balance zinc. It is listed in the EN standards for free-machining rod, forging stock, profiles, hollow rod, tubes and forgings.
In condition R540 the minimum values are 540 N/mm² tensile strength, 280 N/mm² 0.2 % proof stress and 15 % elongation. Stronger conditions are R590 (Ø 6–50 mm), R570 (Ø over 50 to 80 mm), R640 (Ø 6–15 mm) and R620 (Ø over 15 to 50 mm). Condition M is as manufactured, without mechanical requirements.
They are counterparts, not identical grades. C67420 (Copper Development Association) allows 57.0–58.5 % copper, 1.0–2.0 % aluminium, 1.5–2.5 % manganese and 0.25–0.7 % silicon; CW713R allows 57.0–59.0 % copper, 1.3–2.3 % aluminium, 1.5–3.0 % manganese and 0.3–1.3 % silicon. A heat can meet both, but neither range contains the other — compare the EN 10204 3.1 analysis with the grade on your drawing.
High wear resistance and good hot formability make it a grade for mechanical engineering and automotive parts; typical uses of the UNS counterpart C67420 are gear rings, shafts and wear plates. It is chosen where strength and wear resistance matter more than free machining — the machinability rating of C67420 is 50, against 100 for C36000.
For RoHS, its 0.2–0.8 % lead is above the 0.1 % threshold and 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 CW724R and the bismuth brass C6802.
Yes — made to your drawing: turned and milled in Jamnagar, or hot-forged through our qualified forging partners and finish-machined in-house. Whether bar or forging stock certified to CW713R 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, forged first articles 8–10 weeks.
EN 12164 – CW713R / CuZn37Mn3Al2PbSi – R540 for rod, or the EN 12165 designation for forging stock. The UNS counterpart is C67420.Primary source: EN 12164 / EN 12165 — Copper and copper alloys: rod for free machining purposes; forging stock (CEN).
High-tensile brass parts turned, milled or forged and inspected in Jamnagar. ISO 9001:2015. Quote within 24 hours.
Request a QuoteComposition limits and condition values: EN 12164. UNS counterpart 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 CW713R 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.