C70250 High Performance Alloy Wire (CuNi3Si1)
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Alloy C70250 is a High Performance Alloy that combines strength, conductivity, formability and stress relaxation resistance into a unique set of properties. C70250 has the qualities of some of the Beryllium Coppers without containing any Beryllium. The alloy is a thermally aged material. It achieves it’s properties by combinations of cold work and heat treatments, all of which is done at the mill. The alloy’s high strength and conductivity combined with its formability and stress relaxation properties make C70250 an excellent electronic alloy, particularly in high temperature environments.
Mechanical Properties
Round Wire
| Temper Code | Tensile Strength (N/mm²) | Mill Limits | |
| Min | Max | ||
| TL02 | 550 | 690 | .0254 - 3.264 mm |
| TL03 | 690 | 825 | |
| TR02 | 605 | 0 | |
| TM00 | 620 | 760 | |
| TM02 | 655 | 825 | |
| TM03 | 690 | 860 | |
Square Wire
| Temper Code | Tensile Strength (N/mm²) | Mill Limits | |
| Min | Max | ||
| TL02 | 550 | 690 | .2540 - 1.905 mm |
| TL03 | 690 | 825 | |
| TR02 | 605 | 0 | |
| TM00 | 620 | 760 | |
| TM02 | 655 | 825 | |
| TM03 | 690 | 860 | |
Physical Properties
| Melting Point (Liquidis) | 1095°C |
| Melting Point (Solidus) | 1075°C |
| Density | 8.80232 gm/cu cm |
| Electrical Resistivity (Annealed) | 4.3057 ?? -cm @ 20°C |
| Electrical Conductivity (TM00 Temper) | 0.23416668 MegaSiemens /cm @ 20°C |
| Electrical Conductivity (TM02 Temper) | 0.23416668 MegaSiemens /cm @ 20°C |
| Electrical Conductivity (TM03 Temper) | 0.23416668 MegaSiemens /cm @ 20°C |
| Electrical Conductivity (TR02 Temper) | 0.204895845 MegaSiemens /cm @ 20°C |
| Thermal Conductivity (Solutionized-Aged) | 168.8289474 W/m · °K @ 20°C |
| Modulus of Elasticity (Tension) | 131000 MPa |
For a full size version of product specifications, including chemical composition in both US and Metric units, please download the PDF.