Hi friends I am establishing a welding procedure for welding of 90-10 Cu-Ni 6mm thick tubes, UNS C70600 as per ASME SecIX. All joints are single sided joints and i will be welding them with TIG: ER CuNi filler wire. My only query was that do i need to back purge the weld joints ? Regards Prem S Nautiyal |
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