Issues regarding the welding of pump body cast steel parts
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The pump body is made of cast steel ZG07Cr19Ni9, and its discharge pipe is made of 304 material. Cracks have appeared in the welds that connect the discharge pipe to the pump body; attempts were made to repair these cracks using A102 material, but with little success. I would like to ask fellow sailors for their experience and insights on this matter. Thank you first.
···········Use 304 welding rod; the pump body is made of 304
Increase the welding speed, reduce the heat input per line, and make each layer thinner to lessen welding stress, which will yield better results.
A102 welding rod is the correct one. Before welding, remove all cracks and polish until the metallic luster is revealed.
Either welding rod 102 or 302 can be used; it is best to clean the surface first, and welding with 308L wire using TIG welding yields better results.