
Product features:
The distribution of flux is uniform, with a deviation of ≤ 0.1%;
Uniform wire diameter, less likely to block the conduit;
Good wettability and fast soldering speed;
Low smoke and minimal splashing;
The solder joints are bright, with minimal residue after welding, and high insulation resistance between solder joints.
This product is suitable for robot automatic welding, compatible with various brands of automatic welding equipment, and also suitable for various welding methods such as drag welding and manual welding.
This product uses special grade hydrogenated rosin and high-purity refined tin as the main raw materials, adopts a composite multi-element active flux formula, combines advanced production technology, strict quality control process, and perfect detection system, and is carefully developed to meet the needs of miniaturization and high-precision development of modern electronic products. The product complies with and exceeds the requirements of the EU RoHS directive.
Product features:
The distribution of flux is uniform, with a deviation of ≤ 0.1%;
Uniform wire diameter, less likely to block the conduit;
Good wettability and fast soldering speed;
Low smoke and minimal splashing;
The solder joints are bright, with minimal residue after welding, and high insulation resistance between solder joints.
This product is suitable for robot automatic welding, compatible with various brands of automatic welding equipment, and also suitable for various welding methods such as drag welding and manual welding.
Model: SnCu0.7 (lead-free solder wire for automatic soldering)
Alloy composition: 99.3% tin, 0.7% copper
Melting point: 227 ℃
Packaging specifications: 500g/roll (40 rolls/box), 1kg/roll (10 rolls/box)
Wire diameter specification: 0.3-3.0mm
Flux content: 2.2% (conventional), 1.5% (low content), 3.3% (high content), solid core
The flux content can be customized according to demand
Suggested welding temperature: 340 ℃~380 ℃, which needs to be adjusted appropriately according to the size of the welded part, welding process, and welding effect.

Lead free solder wire flux type
Flux model | Expansion rate% | Purpose |
H1(convention) | ≥80 | Suitable for soldering high insulation resistance requirements in electronics, instruments, meters, household appliances, PCB boards, etc. |
H2 | ≥85 | Suitable for welding difficult to weld metal base materials, such as galvanized, nickel plated, Kovar alloy, Dummy wire, beryllium bronze, etc., which require high efficiency for welding. |
H3 | ≥90 | Suitable for welding difficult to weld metal base materials, such as capacitors, zinc spraying, gold spraying, nickel plating, zinc plating, Dummy wire, beryllium bronze and other welding with high efficiency requirements. |
R0 | ≥80 | Suitable for welding in electronics, instruments, meters, household appliances, PCB boards, etc. that require high halogen content. |
S1 | ≥80 | Suitable for high insulation resistance spot welding, drag welding, secondary repair welding, etc. in electronics, instruments, meters, household appliances, PCB boards, etc. |
Product features:
The distribution of flux is uniform, with a deviation of ≤ 0.1%;
Good wettability and fast soldering speed;
Low smoke and minimal splashing;
The solder joints are bright, with minimal residue after welding, and high insulation resistance between solder joints.
This product is widely used for automatic and manual welding of electronics, instruments, household appliances, and printed boards.
Product features:
The distribution of flux is uniform, with a deviation of ≤ 0.1%;
Excellent wettability and fast welding speed;
The welding points are beautiful and the welding quality is reliable.
This product is suitable for the capacitor manufacturing industry and can directly achieve soft soldering connection on the zinc coating and gold alloy coating on the end face of the capacitor. It is especially suitable for welding difficult to weld metal base materials, such as nickel plated parts, galvanized parts, Dumei wire, beryllium bronze, etc.