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

2.1. Tin content: 63,0 ±0,5%
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 60 pcs /6 kg(100 g reels) cartons 5 kg (250 g and 500 g reels) cartons 10 kg( 1 kg 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.