AWS A5.17/ASME SFA5.17 F7A4-EM12K
JIS Z3183 S502-H
AWS A5.23/ASME SFA5.23 F9TA4G-A2 / F8A2-EA2-G
JIS Z3183 S582-H
EN ISO 14174 S A AB 1 / EN ISO 14171 S2Si[S2Mo]

Applications

AWS A5.17/ASME SFA5.17 F7A4-EM12K Butt and flat fillet welding of buildings, bridges and API Line-pipe (Spiral)

Notes on Usage

Characteristics on Usage

It provides good bead appearance, better slag removal and high impact value of the weld metal.
It is relatively insenitive to rust and dirt on a base metal and makes better resistance to pockmark and pit.

High impact values in both multi-run and two-run technique.

As the consumption of flux is low, it is very economical

① Dry the flux at 300~350°C (572~662°F ) for 60 minutes before use.
② When the flux height is excessive, poor bead appearance may occur.
③ Use welding current and speed as low as possible at the first layer of groove to avoid cracking.