C425 Copper-Zinc-Tin Alloy Wire (CuSn3Zn9)
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Alloy C425 is a low zinc-containing alloy with good combination of tensile strength, electrical conductivity, formability and corrosion resistance. Applications include electrical springs, connectors and terminals.
Mechanical Properties
Round Wire
| Temper Name | Temper Code | Tensile Strength (N/mm²) | Mill Limits | |
| Min | Max | |||
| Annealed | 290 | 360 | .0254 - 3.264 mm | |
| 1/4 Hard | H01 | 395 | 495 | |
| 1/2 Hard | H02 | 505 | 605 | |
| 3/4 Hard | H03 | 585 | 690 | |
| Hard | H04 | 655 | 760 | |
| Extra Hard | H06 | 725 | 825 | |
| Spring | H08 | 795 | 0 | |
Square Wire
| Temper Name | Temper Code | Tensile Strength (N/mm²) | Mill Limits | |
| Min | Max | |||
| Annealed | 290 | 360 | .2540 - 1.905 mm | |
| 1/4 Hard | H01 | 395 | 495 | |
| 1/2 Hard | H02 | 505 | 605 | |
| 3/4 Hard | H03 | 585 | 690 | |
| Hard | H04 | 655 | 760 | |
| Extra Hard | H06 | 725 | 825 | |
| Spring | H08 | 795 | 0 | |
Rolled Flat
| Temper Name | Temper Code | Tensile Strength (N/mm²) | Mill Limits | |
| Min | Max | |||
| Annealed | 275 | 345 |
Thickness: Width: |
|
| 1/4 Half Hard | H01 | 340 | 405 | |
| 1/2 Hard | H02 | 395 | 475 | |
| 3/4 Hard | H03 | 425 | 510 | |
| Hard | H04 | 485 | 565 | |
| Extra Hard | H06 | 525 | 605 | |
| Spring | H08 | 580 | 650 | |
| Extra Spring | H10 | 635 | 0 | |
Physical Properties
| Melting Point (Liquidis) | 1032°C |
| Melting Point (Solidus) | 1010°C |
| Density | 8.74696 gm/cu cm |
| Electrical Resistivity (Annealed) | 6.151 ?? -cm @ 20°C |
| Electrical Conductivity (Annealed) | 0.16392 MegaSiemens /cm @ 20°C |
| Thermal Conductivity (Solutionized-Aged) | 119.4789 W/m · °K @ 20°C |
| Coefficient of Thermal Expansion | 0.00001836°C (20-300°C) |
| Modulus of Elasticity (Tension) | 110300 MPa |
For a full size version of product specifications, including chemical composition in both US and Metric units, please download the PDF.