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Tin-Lead Alloys · With Resin Core
Resin-core solder wire (integrated flux) that facilitates wetting and cleaning of surfaces during the soldering process. Ideal for electronic assembly, repairs, and manual processes where controlled flow is required without the need for external flux.
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Resin-core or flux-cored soldering is a wire that incorporates a flux inside, eliminating the need to apply external flux during the soldering process.
The resin core or flux serves to clean and deoxidize metal surfaces, allowing the solder to wet properly and form reliable joints. It is especially useful in electronic assembly and manual repairs.
The combination of tin (Sn) and lead (Pb) offers an optimal balance of flowability, mechanical strength, and thermal stability. The resin or flux core adds the advantage of a cleaner and more efficient process.
We also offer flux paste as an adjunct for surfaces that require additional cleaning before soldering.
| Alloy | Presentation / Minimum Order | Melting point | Typical application |
|---|---|---|---|
| Sn30-Pb70 | Wire reel of 1 lb and 1/2 lb, Box of bars / 1 lb 25 units, 1/2 lb 50 units, Box x 25kg | 183–255°C | Electrical contacts, aqueducts, sheets, connectors |
| Sn40-Pb60 | Wire reel of 1 lb and 1/2 lb, Box of bars / 1 lb 25 units, 1/2 lb 50 units, Box x 25kg | 183–238°C | Electrical contacts, aqueducts, sheets and connectors |
| Sn50-Pb50 | Wire reel of 1 lb and 1/2 lb, Box of bars / 1 lb 25 units, 1/2 lb 50 units, Box x 25kg | 183–216°C | Stainless steel sheets, cable covering, electronic equipment |
| Sn60-Pb40 | Wire reel of 1 lb and 1/2 lb, Box of bars / 1 lb 25 units, 1/2 lb 50 units, Box x 25kg | 183–190°C | Stained glass, circuits, cable coverings, electronic equipment |
| Sn63-Pb37 (Eutéctica) | Wire reel of 1 lb and 1/2 lb, Box of bars / 1 lb 25 units, 1/2 lb 50 units, Box x 25kg | 183°C | Electronic equipment, integrated circuits, immersion or waveform assemblies |
The appropriate selection depends on the application method, component type, and operating conditions.
Our resin solders are used in electronic assembly, maintenance, and mass production processes.
Presentations adapted to each production process and volume of operation.
Fluxing paste is the perfect complement to this line. Available in a 2 oz box, an 8 oz (1/2 lb) jar, and a 16 oz (1 lb) jar. Also see our solid tin-lead solder for wave or stick soldering processes.
Welding is part of the electrical and thermal performance of the complete system.
When the alloy is aligned with the production process, repeatability is improved, thermal control is optimized, and operational variability is reduced.
Frequently Asked Technical Questions
The 63/37 alloy is eutectic: it melts and solidifies at a single temperature (183°C), allowing for greater control of the thermal process. The 60/40 alloy has a melting range (183–190°C), suitable for applications where this variation is acceptable.
Resin soldering integrates the flux within the resin itself, eliminating the need for external flux application. This simplifies the process, especially for manual soldering and repairs. Solid soldering requires external flux but offers greater versatility in industrial processes such as wave soldering.
The use of lead solder is permitted in industrial, military, medical, and aerospace applications under specific regulations such as the RoHS directive (which includes exceptions). Consult the applicable regulations for each case.
The resin core uses activated resin flux, which cleans and deoxidizes surfaces during soldering without leaving significant corrosive residue. For heavily oxidized surfaces, it can be supplemented with external flux paste.
Excessive temperatures or prolonged exposure times can damage components, impairing their electrical performance. Selecting the correct alloy helps minimize thermal stress during the soldering process.
We support the selection of alloys according to technical requirements and actual application.
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