CW609N
CW609N, categorized as Free cutting brass, stands as a notably refined variation of 60/40 brass, recognized for its exceptional free cutting characteristics. Its application lies in the high-volume production of brass components necessitating topmost output and extended tool longevity. This is particularly pertinent in cases where no subsequent cold forming is essential following the machining process.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 57.00 | 59.00 |
| Pb | 3.50 | 4.20 |
| Fe | – | 0.30 |
| Sn | – | 0.30 |
| Ni | – | 0.30 |
| Al | – | 0.05 |
| Total Others | – | 0.20 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO EN12164 (AS PER TEMPER R430)
| Range | From | To | UTS Min (N/mm²) | PS Min | Elongation Min (%) | Hardness Min | Hardness Max | |
| Round (Dia) | 2 | 40 | 430 | 250 | 10 | – | – | |
| Hex (A/F) | 3 | 40 | 430 | 250 | 10 | – | – | |
| Square (A/F) | 3 | 40 | 430 | 250 | 10 | – | – | |
| Rectangle (Thickness) | 3 | 40 | 430 | 250 | 10 | – | – | |
| PHYSICAL PROPERTIES | |
| Melting Point – Liquidus°F | 1630 |
| Melting Point – Solidus°F | 1610 |
| Densitylb/cu in. at 68°F | 0.306 |
| Specific Gravity | 8.47 |
| Electrical Conductivity% IACS at 68°F | 28 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 71 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.6 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tensionksi | 14000 |
| Modulus of Rigidityksi | 5300 |
| FABRICATION PROPERTIES | |
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Not Recommended |
| Seam Weld | Not Recommended |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Excellent |
| Machinability Rating | 90 |
