General Description

AS DA-778 is a basic coated electrode particularly used for the welding of steels containing 5% Cr and 0.5% Mo. The weld metal has a crack resistance to operating temperatures up to 550°C. Since it is a low hydrogen electrode, the weld metal has a high creep resistance. It has about 110% metal recovery. It is recommended to use the electrode in DC (+).

Applications and Materials to be Welded

Power plant constructions; flange pipes used in petrochemical plants; forged cast parts, vapor production plants, preheaters and heaters, boiler and pressure vessels and pipe connections are among some application areas where AS DA-778 is used.

It can also be used in welding similarly alloyed cementation steels, heat treatable steels and cast steels.

Part should be preheated to 300°C before welding and operating temperature during welding should not exceed 350°C.