Welding Stainless Copper. SES W14-F01 is a part of this standard. As a matter of standard practice we dont weld dissimilar metals it can be done but even the best copperstainless weld has the possibility of failure.
Molten copper infiltrates the stainless steel HAZ grain bounderies causing cracking. Expend your copper slide in your stainless and focus your arc on the copper once the weld pool forms drag it into the stainless being mindful of torch angle. Nickel tack weld and the rest of the weld are consistent with the assumption that the rest of the weld was made with the gas tungsten arc welding GTAW process using the re- quired ER316L welding wire taking dilu- tion into consideration.
In order to produce a symmetric bead shape the torch angle was set to be 15 degrees relative to the copper and perpendicular to the weld direction.
Continuous welding was performed to obtain a homogeneous joint. Well heres the long answer. This article describes the welding and brazing of copper-nickel to austenitic stainless steels. So we only connect copper to stainless with a mechanical joint such as a flange pipe fitting or any other reversible connection.