CuSn CuSn Alloy is pure electrolytic copper-tin alloy in bare condition. Bare wire is used as the outer lead part of Lead-In- Wires of fluorescent tubes, automotive, and other lamps.
NPCuSn NPCuSn Alloy is pure electrolytic copper-tin alloy, uniformly coated with nickel by electrolytic plating method. Nickel plated copper-tin alloy wire is used as the inner lead part of Lead-In-Wires for GLS, fluorescent tubes, automotive, sodium vapor lamps, mercury vapor lamps, etc.
Forms of Supply
As plated and annealed wire
Matt Finish or Bright Finish of wires are available as per the requirement.
| Core | Sn | P | Cu |
|---|---|---|---|
| Regular grade | 0.5 - 1.5 | Max 0.04 | Balance |
| Nickel layer | High purity Nickel | ||
Thickness of Nickel layer
Nickel layer thickness is minimum 2% by weight and typically ranges from 2-4% by weight. Higher Nickel plating thickness (like 4%, 8%, 12%) can be manufactured per the customer requirements. The nickel coating has uniform adhesion over the full length of the CuSn core wire.
| Diameter of wire | Thickness of Nickel plating | Application |
|---|---|---|
| mm | % by weight | |
| 0.40 - 0.60 | 2.0 - 4.0 | For Lead-in-Wires |
| 0.70 - 0.90 | 2.0 - 3.0 | For Lead-in-Wires |
| 0.80 - 2.50 | 1.0 - 3.0 | For Lead-in-Wires |
| Wire Type | Tensile strength (N/mm²) | Elongation % at L0=100 mm |
|
|---|---|---|---|
| Min | Max | ||
| Annealed | 250 | 360 | ≥ 15 |
| Size in mm | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.0 - 2.50 |
|---|---|---|---|---|---|---|---|
| Tolerance (+/-) | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 |
The ovality (difference between the largest and smallest diameter in a section) is less than half the tolerance in the diameter.
| Diameter of wire | Recommneded Spool Type |
Weight per spool |
|---|---|---|
| mm | kg | |
| 0.40 - 0.60 | DIN 160 | 5 - 7 |
| DIN 200 | 6 - 8 | |
| DIN 250 | 12 - 20 | |
| 0.70 - 0.90 | DIN 200 | 6 - 8 |
| DIN 250 | 15 - 22 | |
| 1.0 - 2.50 | Coils | 20 - 50 |
| DIN 355 | 50 - 70 |
Thicker size wires are available in coils or on cardboard rings.
Each spool of wire is individually shrink-packaged and put in a cardboard box for maximum protection against oxidation. It is advisable to use the wire within six months from the date of manufacturing for best performance.
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