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Brass Extrusion and Components
CW621N is a lead-free brass alloy known for its good machinability despite the absence of lead, primarily due to its structural constitution. It is typically used as a cost-effective alternative to leaded machinable brasses.
CW621N is a lead-free brass alloy known for its good machinability despite the absence of lead, primarily due to its structural constitution. It is typically used as a cost-effective alternative to leaded machinable brasses.
Chemical Composition
Chemical Composition
- Copper (Cu): Approximately 60-63%
- Zinc (Zn): Balance (about 37-40%)
- Lead (Pb): Absent (lead-free)
- Other trace elements for structural and machinability enhancement
Mechanical and Physical Properties
Mechanical and Physical Properties
- Machinability rating: Around 60% relative to leaded free-cutting brass CuZn39Pb3 (rated 100%)
- Capacity for cold working: Poor
- Capacity for hot working: Excellent
- Corrosion resistance: Good
- Typical applications include components needing reasonable machinability without lead content
Fabrication Notes
Fabrication Notes
- Excellent for hot working processes
- Poor cold working capacity but can be machined effectively due to microstructure
- Alternative for eco-friendly and lead-free applications where machining is needed
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