Lead Free Solder Rod
Description
KVS Lead-free Solders comply with all the requirements of RoHS directives. It has excellent wetting with higher mechanical strength and reliability.
Wave and Dip lead-free solders are available in a choice of lead-free variants, 99.3Sn/0.7Cu, 96.5Sn/3.5Ag, and 96.5Sn/3.0Ag/0.5Cu. Other alloys are available upon request.
KVS Lead-free solder is suitable for use in any wave soldering process. When converting from 63Sn/37Pb or other lead-bearing alloys, the solder pot should first be filled with pure tin. The pure tin pot should be pumped into the system for several hours to ensure that all lead from 63Sn/37Pb alloy is removed. This pure Sn should then be dumped and the pot can then be changed with lead-free solder alloy.
KVS core solders are also available with Sn/Cu eutectic and Sn/Ag/Cu. Normal hand soldering procedures and iron tip temperatures (650-750°F) can be used.
The properties of a few of the popular grades of Solders are tabulated below. We can also develop and manufacture Solder Sticks and Wire as per specific requirements and specifications of the Customer.
| Element | 60/37.5/2.5 Sn/Pb/Ag | 63/37 | 60/40 | 50/50 | 40/60 | 20/80 | 15/85 | 10/90 |
|---|---|---|---|---|---|---|---|---|
| Sb** | 0.12-0.2 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 |
| Pb | Rest | Rest | Rest | Rest | Rest | Rest | Rest | Rest |
| Cu | 0.12-0.2 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 | 0.12-0.5 |
| Sn | 59.5-60.5 | 62.5– 63.5 | 59.5- 60.5 | 49.5- 50.5 | 39.5- 40.5 | 19.5- 20.5 | 14.5- 15.5 | 9.5-10.5 |
| Ag | 2.5+0.2 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 |
| Fe | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 |
| As | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Bi | 0.07 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Al | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 |
| Cd | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 |
| Zn | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 |
| P | 0.003 | 0.003 | 0.003 | 0.003 | 0.003 | 0.003 | 0.003 | 0.003 |
| Solidus temp. | 179°C | 183°C | 183°C | 183°C | 183°C | 183°C | 225°C | 275°C |
| Liquidus temp | e | 183°C | 191°C | 216°C | 183°C | 277°C | 290°C | 302°C |