Brass CW617N (CuZn40Pb2) Microstructure: Free-Machining Lead Globules
Engineering Overview: Metallurgical analysis of CW617N extruded architectural brass, evaluating microscopic lead globule dispersion and pin broaching chip breaking.
Technical & Engineering Specifications
| Lead Content | 1.6% to 2.5% Pb (Free-Machining Alloy) |
|---|---|
| Alloy Standard | EN CW617N (CuZn40Pb2 / UNS C38000) |
| Tensile Strength | 440 - 480 MPa High Toughness |
| Machinability Index | 95% Free-Cutting Brass Standard |
Metallurgy of High-Speed Broaching
CW617N (CuZn40Pb2) is the worldwide standard for precision lock cylinder bodies.
Microscopic Chip Breaking
- 2.0% Fine Lead Globules: Dispersed throughout the alpha-beta brass matrix, lead acts as an internal lubricant and chip-breaker, enabling $\pm 0.005\text{ mm}$ chamber concentricity.
Frequently Asked Engineering & Selection Questions
Q1: What are the primary material characteristics of this finish?
Metallurgical analysis of CW617N extruded architectural brass, evaluating microscopic lead globule dispersion and pin broaching chip breaking.