Suitable for welding of mild steels and 490Mpa high tensile steels. It is characterized by excellent welding performance when applied to all-position back welding.
Points for Attention
The purity of argon shielding gas must be above 99.997% and gas flow must be properly controlled. When welded under the operating current of 100~200Amp, the gas flow is supposed to be at about 7~12L/min; under the operating current of 200~300Amp the gas flow shoule be controlled at 12~15L/min.
During welding appropriate windproof measures must be taken, otherwise shielding gas will be easily exposed to wind so that weld bead will worsen, giving rise to gas porosity.
Choose a suitable gas-collecting porcelain cup and properly control the electrode extension of tungsten electrode.
Rust layers, oil stain and dust must be fully removed from parent metal's surface.
An example of chemical Composition of Weld Wire(wt%)
Flux cored weld wire
