CZ119
CZ119 stands proudly as the gold standard for machining, boasting a perfect 100% machining index. These alloys also excel in hot stamping, especially when the forged components undergo extensive post-forging machining. It’s the top choice for applications that demand minimal cold working, like knurling. With its remarkable ductility, this material becomes a prime candidate for crafting wires, rods, and sections.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 61.00 | 64.00 |
| Pb | 1.00 | 2.50 |
| Total Others Incl Fe | – | 0.30 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO BS2874 (AS PER TEMPER M)
| Range (mm) | From | To | UTS Min (N/mm²) | PS Min (N/mm²) | Elongation Min (%) | Hardness Min (HV) | Hardness Max |
| Round (A/F) | 1.5 | 75 | 340 | – | 15 | 90 | – |
| Hex (A/F) | 3 | 70 | 340 | – | 15 | 90 | – |
| Square (A/F) | 3 | 60 | 340 | – | 15 | 90 | – |
| Rectangle (Thickness) | 3 | 50 | 340 | – | 15 | 90 | – |
| PHYSICAL PROPERTIES | |
| Melting Point – Liquidus°F | 1700 |
| Melting Point – Solidus°F | 1630 |
| Density lb/cu in. at 68°F | 0.306 |
| Specific Gravity | 8.47 |
| Electrical Conductivity % IACS at 68°F | 26 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.3 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tension ksi | 15000 |
| Modulus of Rigidity ksi | 5600 |
| FABRICATION PROPERTIES | |
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Not Recommended |
| Coated Metal Arc Welding | Not Recommended |
| Not Recommended | Not Recommended |
| Seam Weld | Not Recommended |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Good |
| Capacity for Being Hot Formed | Poor |
| Machinability Rating | 85% |
