TIG 80SB3L, containing 2.5%Cr and 1% Mo, is designed for welding low-alloy steels with high tensile strength and creep-resistant steels of similar composition.
It is suitable for pipelines in pressure vessels and boilers with operating temperatures up to about 550℃.
Use DC-(DCEN) polarity and 100% Argon gas at proper flow rate (10-15 l/min, max. wind 1 m/sec).
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.
Be sure to clean up the contaminations on the base metal and welding seam so as not to derogate the weld metal quality from particles.
