C34000
C34000 is the go-to choice for machining, scoring a perfect 100% on the machining index. These alloys shine in hot stamping when the resulting forged components undergo extensive machining. It’s the top pick for applications involving minimal cold working, like knurling. This material’s ductility makes it a standout for crafting wires, rods, and sections.
CHEMICAL COMPOSITION
| Elements | Min (%) | Max (%) |
| Cu | 62.00 | 65.00 |
| Pb | 0.80 | 1.50 |
| Fe | – | 0.15 |
| Total Others | – | 0.4 |
| Zn | Remainder | |
| (1) Cu + Sum of Named Elements 99.6% min. (2) For flat products, the iron shall be 0.10% max. | ||
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 |
| 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 | Good |
| Capacity for Being Hot Formed | Poor |
| Machinability Rating | 70 |
