Sn63Pb37 SW21
An alternative to the most popular solder wire (Sn60Pb40) with flux, for professional use.
Alloy designation in accordance with ISO 9453:2014: Sn63Pb37E*
Other known alloy markings: S-Sn63Pb37E*
Product type: Cored solder wire (with flux)
Flux: SW21
1. General characteristics
The product is intended for professional use. The solder Sn63Pb37E* was produced in the first smelt of tin and lead. The composition of the solder complies with the ISO 9453:2014 standard. SW21 is organic, water-soluble based, halide activated flux. The solder is soldering most metals except aluminum and stainless steel. It is basic leaded alloy for manual, automatic and robotic processes used in industrial applications in electronics and electrical engineering, where meeting the requirements of the RoHS2 Directive is not required.
* higher cleanliness class.
2. Chemical characteristics
2.2. Lead content: rest
2.3. Composition and permissible impurities according to ISO 9453:2014:
| Sn | Pb | Sb | Bi | Cd | Cu | Au | In | Ag | Al | As | Fe | Ni | Zn |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 62,50 - 63,50 | rest | max 0,05 | max 0,05 | max 0,002 | max 0,08 | max 0,05 | max 0,10 | max 0,10 | max 0,001 | max 0,03 | max 0,02 | max 0,01 | max 0,001 |
3. Physical characteristics
| Melting point (solidus/liquidus) | 183°C |
| Density | 8,40 g/cm3 |
| Electrical conductivity | 0,145 μΩ•m |
| Thermal conductivity | 50 W/m•K |
| Tensile strength | 525 kgf/cm2 |
| Elongation at break | 37% |
| Hardness | 17 HB |
| Suggested operating temperatures | 340 - 400°C |
4. SW21 flux
Organic, water-soluble based, halide activated flux. Special flux composition offers good solderability on various metal surfaces excluding aluminum and its alloys. Residues of flux after soldering are water washable if cleaning is necessary or required. The flux is exceptionally well suited for flame soldering.
| Flux type acc. to DIN 8511 | SW25 |
| Flux type acc. to ISO 9454 | 2.1.2B |
| Flux type acc. to J-STD-004 | ORH1 |
| Flux content | 2,0 +/- 0,2%; 3 cores of flux (1 core or other flux content on request) |
| Halide content | > 2,0% |
| Acid Value | not applicable |
| SIR test (PN-EN ISO 9455-17) | no data |
| Washability | Recommended washing |
5. Product description
| Available diameters |
0,25 • 0,38 • 0,50 • 0,56 • 0,70 • 0,80 • 0,90 • 1,00 • 1,20 • 1,50 • 1,60 • 2,00 • 2,50 • 3,00 • 4,00 mm other on request |
| Packed |
120 pcs /6 kg(50 g reels) cartons other on request |
| Expiration date | Three years from the end of the year of production for example: batch 61112233 = date of production 2016, date of expiry 2019. |
| Storage |
In original packaging at 5-20°C. The recommended humidity level is 20-60%. Keep away from strong oxidizing agents, acids, alkaline agents and beyond the reach of children. |
| Markings | Reels and cartons marked with alloy type, flux type, diameter, net weight and batch number. |
Files to download:
Sn63Pb37 SW21 - Technical data sheet
Sn63Pb37 SW21 - Safety data sheet
Physical, mechanical and chemical properties available in TDS (download above).
