Nickel base TIG wire for alloy 400.
Applications
For welding alloy 400 and similar parent material to itself and others in the Ni-Cu alloy system, such as pure nickel and cupronickel. Welds in alloy K500 are satisfactory but cannot match the strength of this precipitation-hardened alloy. For dissimilar joints between alloy 400 and other alloys or steels, sensitivity to dilution by Fe (20-30%) or Cr (3-6%) can lead to low ductility (or bend-test fissuring) in weld metal close to the fusion boundary. Alloy 400 has a useful combination of strength, thermal conductivity and resistance to corrosion by seawater, inorganic salts, sulphuric and hydrofluoric acids, hydrogen fluoride and alkalis. Applications include heat exchangers, piping, vessels and evaporators in the offshore, marine, chemical, petrochemical and power engineering industries.
Specifications
AWS A5.14: ERNiCu-7
BS EN ISO 18274: SNi4060
BS 2901: Pt2 NA33
DIN 1736: (SG-NiCr30NnTi 2.4377)