C34500
C34500 serves as the standard material for machining, boasting a machining index of 100%. These alloys also prove particularly suitable for hot stamping when the forged components subsequently undergo extensive machining. It is highly recommended for applications that involve cold working with minimal reduction, such as knurling. The ductility of this material positions it as an ideal choice for manufacturing wires, rods, and sections.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 62.00 | 65.00 |
| Pb | 1.50 | 2.50 |
| Fe | – | 0.15 |
| Total Others | – | 0.4 |
| Zn | Remainder | |
MECHANICAL PROPERTIES ACCORDING TO ASTM B453 (AS PER TEMPER HO2)
| Range (Inch) | From | To | UTS Min (ksi) | UTS Max (ksi) | PS Min (ksi) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 0.059 | 0.500 | 57 | 80 | 25 | 7 | 60 | 80 |
| 0.500 | 1.000 | 55 | 70 | 25 | 10 | 50 | 75 | |
| 1.000 | 2.953 | 50 | 62 | 20 | 15 | 40 | 70 | |
| Hex (A/F) | 0.118 | 0.500 | 57 | 80 | 25 | 7 | 60 | 80 |
| 0.500 | 1.000 | 55 | 70 | 25 | 10 | 50 | 75 | |
| 1.000 | 2.756 | 50 | 62 | 20 | 15 | 40 | 70 | |
| Square (A/F) | 0.118 | 0.500 | 57 | 80 | 25 | 7 | 60 | 80 |
| 0.500 | 1.000 | 55 | 70 | 25 | 10 | 50 | 75 | |
| 1.000 | 2.362 | 50 | 62 | 20 | 15 | 40 | 70 |
| Range (mm) | From | To | UTS Min (MPa) | UTS Max (MPa) | PS Min (MPa) | Elongation Min (%) | Hardness Min (HRB) | Hardness Max (HRB) |
| Round (Dia) | 1.5 | 12 | 395 | 555 | 170 | 7 | 60 | 80 |
| 12 | 25 | 380 | 485 | 170 | 10 | 50 | 75 | |
| 25 | 75 | 345 | 425 | 140 | 15 | 40 | 70 | |
| Hex (A/F) | 3 | 12 | 395 | 555 | 170 | 7 | 60 | 80 |
| 12 | 25 | 380 | 485 | 170 | 10 | 50 | 75 | |
| 25 | 70 | 345 | 425 | 140 | 15 | 40 | 70 | |
| Square (A/F) | 3 | 12 | 395 | 555 | 170 | 7 | 60 | 80 |
| 12 | 25 | 380 | 485 | 170 | 10 | 50 | 75 | |
| 25 | 60 | 345 | 425 | 140 | 15 | 40 | 70 |
| 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 |
| Excellent | Excellent |
| Brazing | Good |
| Not Recommended | 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 | Fair |
| Capacity for Being Hot Formed | Poor |
| Machinability Rating | 90 |
