TIG 70S2 a multiple deoxidized mild steel welding wire for TGA welding applications.
In addition to manganese and silicon, it picks aluminum, titanium and zirconium as deoxidizers which provide sound welds in semi-killed and rimmed steels and is suitable for welding steels which have a rusty or dirty surface.
100% Argon shielding gas with 99.997% high purity is recommended and the flow rate must be properly controlled.
The flow rate is recommended 7-12l/min when arc current is 100-200Amp and it goes up to 12-15l/min when arc current rises to 200-300Amp.
Trailer Shield is required to ensure the weld pool completely shielded by inert gas until solidification is complete and no porosity problem.
Select right gas cup size and employ proper stick out of tungsten electrode.
In order to have a very clean weld pool, keep the weld plate free from dirt, rust, paint and any other atmospheric contamination.
