Monel 400 (UNS N04400) to carbon steel welding

[zirsald]

Could you please give me your tips for welding Monel 400 to carbon steel as well as your proposals for GTAW and GMAW welding consumables

[mohd]

dear one,

you can use ERNiCu7.

regards
mohd.

[alesio]

As Mohd has told you can use SFA-5.14/ ERNiCu-7 which is used for both GTAW and GMAW processes. Since during welding high diffusion of carbon steel into monel may lead to cracking after the completion of the welding, buttering is recommended. The carbon steel should be buttered by a layer of ERNiCu-7 rod using low current in order to avoid deep penetration of monel (welding consumable) into carbon steel. Then settle the joint and complete the welding. Regarding welding parameters, please have a look at the attached file.