Explanation: HJ420 is a smelting type high manganese, high silicon, and low fluorine flux, with ordinary particles ranging from 8-40 mesh and fine particles ranging from 18-150 mesh. Dual use of AC and DC, DC reverse connection is used for DC. Easy slag removal, good welding process performance, strong rust and porosity resistance.
Usage: Used in conjunction with H08A, H08MnA, H10Mn2 and other welding wires, it can weld low carbon steel and certain low-alloy high-strength steel structures such as Q345, Q390 (15MnV), etc. Such as boilers, shipbuilding, pressure vessels, and pipelines. Fine particle flux combined with fine welding wire is suitable for single pass high-speed welding of thin plates.

Advantages
High production efficiency, high weld quality, manual operation, inherent advantages of stable welding quality, high welding productivity, no arc light and minimal smoke, make it the main welding method in the production of important steel structures such as pressure vessels, pipe sections, and box beams and columns
Application
The product is widely used in marine engineering, nuclear power industry, shipbuilding, boilers, chemical equipment, bridge construction, metal structures, oil pipelines, pressure vessel manufacturing, roll welding, construction industry, etc
Strength
We have 18 technical personnel, a complete quality assurance system and experimental testing capabilities, chemical analysis, welding, mechanical performance laboratories and testing equipment, and close connections and cooperation with multiple universities, research institutes, and research institutes
Technical capability
Having an experienced and strong technical team, constantly exploring and innovating in research and development, ensuring the quality of solder flux, and providing customers with comprehensive after-sales service