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Sn63Pb37 SW26

An alternative to the most popular solder wire (Sn60Pb40) with flux, for professional use.

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Alloy designation in accordance with ISO 9453:2014: Sn63Pb37E*
Other known alloy markings: S-Sn63Pb37E*
Product type: Cored solder wire (with flux)
Flux: SW216

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. SW26 solid flux is based on rosin and halide formulations. 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
Density8,40 g/cm3
Electrical conductivity0,145 μΩ•m
Thermal conductivity50 W/m•K
Tensile strength525 kgf/cm2
Elongation at break37%
Hardness17 HB
Suggested operating temperatures - soldering tip temperature
(values that can be the starting point for process settings)
340 - 400°C

4. SW26 flux

SW26 flux assures good solderability in popular basic soldering applications in all branches of industry. Cored solder wire works on most metal surfaces excluding aluminum, its alloys and stainless steel. If it necessary, use alcohol-based solvents to wash the residue.

Flux type acc. to DIN 8511SW26
Flux type acc. to ISO 94541.1.2B
Flux type acc. to J-STD-004ROL1
Flux content2,5 +/- 0,2%; 3 cores of flux (1 core or other flux content on request)
Halide content0,5%
Acid Valuea215 ±10 mg KOH/g
SIR test (PN-EN ISO 9455-17)no data

5. Other information

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


50 g – cartons 120 pcs.
100 g – cartons 30 pcs. / 3 kg
250 g – cartons 5 kg
500 g – cartons 5 kg
1 kg – cartons 10 kg

other on request

Expiration date 3 years from the end of the year of production.
for example: batch 61112233 = date of production 2016, date of expiry 2019
Label Reels and cartons marked with alloy type, flux type, diameter, net weight and batch number.
Storage Store at room temperature, in a dry place and beyond the reach of children.

Files to download:

Sn63Pb37 SW26 - Technical data sheet

Sn63Pb37 SW26 - Safety data sheet

Physical, mechanical and chemical properties available in TDS (download above).

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