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CW614N
CW614N
CW614N (chemical designation CuZn39Pb3) is the primary European standard free-machining brass defined under EN 12164 (rods for free machining) and EN 12167 (profiles and rectangular bars). Structured with an $(\alpha + \beta)$ duplex phase and a controlled $2.5\% - 3.5\%$ lead dispersion, it is engineered specifically for high-speed, high-volume automated turning, CNC milling, and Swiss-screw machining operations.
Chemical Composition
Elements | Min (%) | Max (%) |
Cu | 57.00 | 59.00 |
Pb | 2.50 | 3.50 |
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 (mm) |
From |
To |
UTS Min (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
|
| Round (Dia) | 2 |
40 |
430 |
220 |
10 |
– |
– |
|
| Hex (A/F) | 3 |
35 |
430 |
220 |
10 |
– |
– |
|
| Square (A/F) | 3 |
35 |
430 |
220 |
10 |
– |
– |
|
| Rectangle (Thickness) | 3 |
40 |
430 |
220 |
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 |
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