Weight %. Lower Zn raises Cu content and improves corrosion resistance; Pb held low at ≤0.25%, meeting the NSF/ANSI 372 lead-free limit.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper | Cu | 62.0 | 64.0 | 63.0 |
| Zinc | Zn | Balance | ~36.5 | |
| Lead (max) ✓ | Pb | — | 0.25 | ≤0.20 |
| Iron | Fe | — | 0.30 | 0.05 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength (Rm) | H04 hard, typ | ~435 | MPa |
| Proof Stress (Rp0.2) | H04 hard, typ | ~325 | MPa |
| Elongation (A) | H04 hard, typ | ~25 | % |
| Hardness | H04 hard, typ | ~68 | HRB |
| Machinability | vs C36000 = 100 | ~70% | — |
| Density | — | 8.44 | g/cm³ |
| Thermal Conductivity | — | ~116 | W/(m·K) |
| Melting Point | liquidus | ~915 | °C |
| Standard | Designation |
|---|---|
| UNS (USA) | C27450 |
| EN | CuZn36 (low-Pb variant) |
| ASTM | C27000 (close, higher Pb) |
| Trade name | Low-Lead Yellow Brass |
C27450 is a low-lead CuZn36-type brass with lead held at or below 0.25% (meeting the NSF/ANSI 372 lead-free limit), rated around 70% machinability. It offers good corrosion resistance and is used for low-lead plumbing fittings, gas components and machined parts.
Yes. As a copper alloy it is RoHS-compliant under Exemption 6(c), which permits up to 4% lead; with lead at or below 0.25% it also meets the NSF/ANSI 372 lead-free limit for potable-water wetted parts.
C27450 is the economical lead-free choice for general parts; silicon brasses machine better (78–80% vs ~70%) and add intrinsic dezincification resistance for potable water. If the part is water-wetted or heavily machined, the silicon grades usually justify their premium.
Plan for lower speeds and longer chips than free-machining brass — closer to cartridge brass behaviour. Brassland machines C27450 routinely; send your drawing and we'll confirm cycle time and pricing within one business day.
Low-lead brass, RoHS compliant via Exemption 6(c). 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 C27450 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.