CuZn40 pipes are alloys of copper and zinc that come in tubular form and find application in assembly structures, heat exchange systems, condensers, and general engineering operations. This material is also known as CW509L, CZ109, and a similar UNS C28000 material. The CuZn40 low lead brass is an alloy of Muntz metal which contains 60% copper and 40% zinc. The material may be produced either cold drawn or hot extruded and is supplied in different outer dimensions and wall thicknesses. CuZn40 is a low lead content (0.20% max EN, 0.30% max UNS C28000) alloy and is not lead free nor for use with US drinking water. USA Piping Solution supplies brass products with material specifications and dimensions confirmed against applicable standards and project requirements.
Specifications of Cuzn40 Low Lead Brass Pipes
|
Parameter |
Specification & Commercial Details |
|---|---|
|
Product Name |
CuZn40 Low Lead Brass Pipes / Seamless 60/40 Muntz Metal Tube |
|
Material Designations |
CuZn40 (EN Name) | CW509L (EN Numeric) | CZ109 (BS) | UNS C28000 (CDA) |
|
Material Class |
Duplex Alpha-Beta Structural Brass (Muntz Metal) |
|
Governing Standards |
EN 12449 (European seamless round tubes) ASTM B135 / B135M (North American seamless brass tube, C28000) |
|
Product Forms |
Seamless Round Pipes, Heavy-Wall Tubes, Architectural & Engineering Sleeves |
|
Manufacturing Process |
Hot Extrusion followed by Cold Drawing |
|
Lead Classification |
Structural Low-Lead Alloy (Not lead-free; not rated for US drinking water contact surfaces) |
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Environmental Compliance |
EU RoHS: compliant under copper-alloy exemption 6(c) (confirm current validity) |
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Corrosion Protection |
Uninhibited duplex structural brass (No formal DZR rating) |
|
Supply Tempers |
Annealed / Soft, As-Drawn, Half-Hard, or Hard |
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Dimensional Scope |
Outside Diameter (OD): 6 mm to 150 mm Wall Thickness: 0.8 mm to 12.5 mm |
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Length Options |
Standard random mill lengths (3 m to 6 m) or cut-to-length pieces |
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Surface Finish |
Smooth Drawn, As-Extruded, Bright Clean Finish |
|
Primary Applications |
Heat exchanger and condenser sleeves, architectural piping, balustrades, turnbuckles, heavy bushings, and structural hardware |
|
Quality & Certification |
EN 10204 3.1 Material Test Certificate (MTC), Lot Traceability, Dimensional Inspection Report |
Applications and Industrial Uses of Cuzn40 Low Lead Brass Pipes
- Heat Exchanger Tubing
- Condenser Systems
- Marine Engineering Components
- Architectural and Structural Frameworks
- Industrial Machinery Components
- General Engineering Assemblies
- Electrical and Instrumentation Components
- Fabricated Brass Fittings and Connectors
Frequently Asked Questions
1. What are CuZn40 low lead brass pipes?
CuZn40 low lead brass pipes are copper-zinc alloy tubes containing approximately 60% copper and 40% zinc, used in heat exchangers, condensers, and structural applications.
2. Is CuZn40 the same as CW509L and C28000?
CuZn40 corresponds to EN CW509L and the British designation CZ109. UNS C28000 is a comparable North American grade, but composition limits may differ by standard.
3. Which standard covers CuZn40 pipe and tube?
EN 12449 covers general-purpose European brass tubes, while ASTM B135/B135M covers seamless brass tube in applicable North American grades.
4. What is the composition of CuZn40?
CuZn40 typically contains 59.0% to 61.5% copper under EN CW509L specifications, with zinc as the balance and controlled amounts of lead, iron, and other elements.
5. Is CuZn40 lead free?
No. CuZn40 is a low-lead brass alloy, not a lead-free material. Its permitted lead content depends on the applicable material standard.
6. What is the lead limit for CuZn40?
EN CW509L specifies a maximum of 0.20% lead, while UNS C28000 specifications may allow up to 0.30%.
7. How machinable is CuZn40?
CuZn40 is rated about 40 on the C36000 = 100 scale, so it machines with longer chips than free-cutting brass. Use sharp tools and suitable lubricant.
8. Is CuZn40 dezincification resistant?
No. CuZn40 is not inherently dezincification-resistant (DZR) brass. Its suitability depends on water chemistry, temperature, flow conditions, and the operating environment.