A022 stainless steel welding rod found quite GB E316L-16 AWS E316L-16 

 Description: A022 is a titanium calcium type of ultra-low carbon Cr18Ni12Mo2 stainless steel electrode, the deposited metal carbon content ≤ 0.04%, with good heat resistance, corrosion and cracking, anti-hole performance, good performance of the operating process , drug-resistant skin red, good intensity. Can be AC ??and DC. 

 Uses: used in welding urea, synthetic fibers and other equipment and the same type of stainless steel can also be used for post-weld heat treatment can not be combined stainless steel and chrome steel, dissimilar steel