Introduction of nickel-based alloy steel welding materials—submerged arc welding materials

1.Suggestions for welding material selection：

  There is no specific chapter in AWS specification for nickel-based submerged arc welding materials. The part of welding wire is mainly based on AWS A5.14 "Specification for Nickel and Nickel Alloy Bare Welding Wire and Welding Rod". Relevant contents are described as nickel-based solid welding wire.

2.Key points of welding operation：

(1)Storage management of welding materials：

Please refer to the description of submerged arc welding materials of carbon steel for storage management.

 

(2)Precautions for welding：

①Please refer to the contents of nickel-based covered weld for cleaning and temperature management.。

 

②The welding polarity can be DC (+) or DC (-). In slotting welding, it will be set to DC (+) to obtain flatter welding channel and deeper permeability. In surface cladding welding, it will be set to DC (-) to obtain higher filling rate and reduce dilution rate.

 

③The heat input of submerged arc welding shall not be too large to avoid cracking of welding channel.

 

④Please refer to the contents of stainless steel submerged arc welding material for other matters needing attention.