
Monel Filler Wire (ERNiCu-7): Grades, Applications & How to Choose
Monel filler wire is the go-to consumable for welding nickel-copper alloys used in the world’s harshest marine and chemical environments. The most widely specified grade is ERNiCu-7 – a titanium-bearing nickel-copper wire that produces dense, porosity-free welds with excellent seawater and acid resistance. This guide explains ERNiCu-7 Monel filler wire – its composition, grades and forms, key applications, and exactly how to choose the right one for your job. What is Monel Filler Wire (ERNiCu-7)? ERNiCu-7 (UNS N04060), commonly known as Monel Filler Metal 60 or Alloy 60, is a nickel-copper filler wire classified under AWS A5.14 for TIG (GTAW) and MIG (GMAW) welding. It is the matching filler for welding Monel alloy 400 and other nickel-copper alloys. Its defining feature is a controlled addition of titanium, which deoxidises the weld pool and prevents the porosity that plagues nickel-copper welds made with base-composition filler. The result is sound, corrosion-resistant weld










