Sn99,3Cu0,7 PRO

Lead-free solder alloy with flux, for universal use in electronics and electrotechnics.

Alloy designation in accordance with ISO 9453:2020:
Sn99,3Cu0,7 (401)
Product type: Cored solder wire
Flux: PRO

1. General characteristics

The solder was produced in the first smelt of tin and copper. The composition of the solder complies with the ISO 9453 standard. The flux PRO has good spread and its J-STD classification is ROL0. It is lead-free solder wire for manual and automatic processes used in industrial applications in electronics and electrical engineering, where meeting the requirements of the RoHS Directive is required.

2. Chemical compositions, mass fraction in %

Sn	Cu	Bi	Sb	Ag	Cd	Au	In	Pb	Al	As	Fe	Ni	Zn
rest	0,05 - 0,90	max 0,10	max 0,10	max 0,10	max 0,002	max 0,05	max 0,10	max 0,07	max 0,001	max 0,03	max 0,02	max 0,01	max 0,001

3. Physical characteristics

Melting point: (solidus / liquidus)	227°C
Density	7,31 g/cm³
Electrical conductivity	0,126 μΩ•m
Thermal conductivity	66 W/m•K
Tensile strength	300 kgf/cm²
Elongation at break	21 %
Hardness	9 HB
Suggested operating temperatures	340 - 420°C (recommended soldering temperature above 380 °C)

4. PRO flux

acc. to DIN 8511	SW32
acc. to ISO 9454	1.1.3.B
acc. to J-STD-004	ROL0
Flux content	3,0 +/- 0,2% other on request
Halide content	0,0 %
Acid Value	305 ±10 mg KOH/g
Corrosiveness	noncorrosive

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
Packed	100 g – cartons 30 pcs./3kg 250 g – cartons 5 kg 500 g – cartons 5 kg 1 kg – cartons 10 kg other on request
Expiration date	5 years from the end of the year of production. for example: batch 61112233 = date of production 2016, date of expiry end of 2021
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.