C34000 are the standard materials for machining (machining index 100 %). These alloys are also particularly suitable for hot stamping when the forged parts are subsequently machined extensively. Is recommended for applications where cold working with little reduction such as knurling is used. The ductility of this material makes it particularly suitable for the manufacture of wires as well as rods and sections.
Chemical Composition
| Elements |
Min (%) |
Max (%) |
| Cu |
62.00 |
65.00 |
| Pb |
0.25 |
0.70 |
| Sn+Fe |
– |
0.15 |
| Zn |
Remainder |
Mechanical properties according to ASTM B453 (As per temper HO2)
| Range |
UTS Min |
UTS Max |
PS Min |
Elongation |
Hardness |
| Round |
1.5 – 12 |
395 |
555 |
170 |
7 |
60 |
80 |
| Hex |
3 – 12 |
395 |
555 |
170 |
7 |
60 |
80 |
| Square |
3 – 12 |
395 |
555 |
170 |
7 |
60 |
80 |
| Rectangle |
12 – 25 |
380 |
485 |
170 |
10 |
50 |
75 |
| 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 68-572 10⁻⁶ per °F |
11.3 |
| Specific Heat BTU/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tension ksi |
15000 |
| Modulus of Rigidity ksi |
5600 |
| FABRICATION PROPERTIES |
| Soldering |
Excellent |
| Brazing |
Good |
| Oxyacetylene Welding |
Not Recommended |
| Gas shielded Arc Welding |
Not Recommended |
| Coated Metal Arc Welding |
Not Recommended |
| Spot Welding |
Not Recommended |
| Seam Welding |
Not Recommended |
| Butt Welding |
Fair |
| Capacity for Being Cold Worked |
Good |
| – |
Poor |
| Machinability Rating |
70 |
