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Applications of Soft Solders
Alloys can be produced in various forms, including solid wire, flux-cored wire (with flux content ranging from 0.5% to 3.5%), bars, or pre-forms. ST400 and ST300 are recommended for use in environments where ‘soft’ water may corrode conventional tin-lead solders. Alloys containing silver resist silver migration when soldering silver-plated components.
Additionally, special alloys can be created upon customer request.
| Thessco Grade | Nominal Composition | Melting Range (°C) | EN 29453 Specifications | Comments | |||||
|---|---|---|---|---|---|---|---|---|---|
| Ag | Sn | Cu | Zn | Other | Solidus | Liquidus | |||
| ST400 | 4 | 96 | 221 | 224 | 28 | Good colour match for INOX | |||
| ST350 | 4.5 | 96.5 | 221 | 221 | 28 | Good for narrow joint gaps | |||
| ST300 | 3 | 97 | 221 | 225 | 29 | ||||
| SC300 | 97 | 3 | 230 | 250 | 24 | Higher temperature resistance | |||
| SC1000 | 90 | 10 | 221 | 295 | |||||
Other materials are available upon request – please consult your Sales Office. Safety Data Sheets are available on request
