CW705R low lead brass pipes are manufactured from a high tensile copper-zinc based alloy to which aluminium, iron and manganese have been added for load-bearing and wear parts. The alloy is CuZn25Al5Fe2Mn2Pb and has a high mechanical strength and wear resistance. The typical tensile strength is between 690 and 770 MPa, depending on the product form, size and temper. The EN 12163 minimum for rod is 550 MPa. CW705R contains 0.2 to 0.8% lead. It is not lead free and not intended for use for drinking-water contact. USA Piping Solution supplies CW705R for industrial assemblies.
Specifications of CW705R Low Lead Brass Pipes
| Property / Parameter | Specification / Detail |
|---|---|
| EN Numerical Designation | CW705R |
| EN Chemical Designation | CuZn25Al5Fe2Mn2Pb |
| Alloy Type | High-tensile aluminium-manganese brass with controlled lead |
| Governing Standards | EN 12163 (rod for general purposes), EN 12164 (free-machining rod), EN 12167 (profiles and rectangular bar), EN 12168 (hollow rod) |
| Equivalent Grades | National EN adoptions (DIN EN, BS EN, NF EN) use the same CW705R designation. No UNS number confirmed. |
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Applications and Industrial Uses of CW705R Low Lead Brass Pipes
- Marine Engineering Equipment
- Shipbuilding Components
- Hydraulic Systems
- Heavy-Duty Machinery
- Industrial Valve Manufacturing
- Pump Components
- High-Strength Mechanical Assemblies
- Industrial Fasteners and Fittings
Frequently Asked Questions
What is CW705R brass?
CW705R is a high-tensile European standard brass alloy (CuZn25Al5Fe2Mn2Pb) containing aluminium, iron, manganese, and controlled lead. It delivers elevated mechanical strength and high wear resistance compared to standard commercial brasses.
What is CuZn25Al5Fe2Mn2Pb?
CuZn25Al5Fe2Mn2Pb is the standardized chemical designation for CW705R brass under European EN standards. The formula indicates a copper base with about 25% zinc, with nominal additions of 5% aluminium, 2% iron and 2% manganese and a controlled lead content of 0.2 to 0.8%.
Is CW705R low lead or lead-free?
CW705R is a controlled low-lead alloy (0.2 to 0.8% lead), not a lead-free brass. Its lead content exceeds the maximum 0.25% weighted-average threshold used for US potable-water components.
Is CW705R the same as C33000?
No. C33000 is a standard yellow brass tube alloy containing no aluminium or manganese, with significantly lower tensile strength. CW705R is a high-strength aluminium-manganese brass alloy engineered for heavy mechanical duty.
What is the tensile strength of CW705R?
CW705R typically exhibits an ultimate tensile strength (Rm) between 690 and 770 MPa, with an EN 12163 standard minimum requirement of 550 MPa for general-purpose rod stock.
Which standard covers CW705R?
CW705R is standardized under European non-ferrous material frameworks, primarily EN 12163 (rod for general purposes), EN 12164, EN 12167, and EN 12168.
What are the equivalent grades of CW705R?
CW705R is identically designated as CuZn25Al5Fe2Mn2Pb across national European standards, including DIN (Germany), BS (United Kingdom), and AFNOR NF (France). It does not have an exact direct UNS designation.
Can CW705R be used for drinking water?
No. CW705R is not suitable for drinking-water systems. Its 0.2 to 0.8% lead range exceeds the 0.25% weighted-average limit used for US potable-water components.
CW705R supplied for industrial assemblies.
Send your specification to USA Piping Solution for a same-day quote with confirmed lead times.
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