Principal Design Features:
Filler Metal Alloy W is a nickel-molybdenum alloy also containing chromium and iron (63% Ni, 24% Mo, 6% Fe, 5% Cr). It is primarily intended as a filler metal for the welding of dissimilar high temperature, high strength application alloys.
Used as a weld metal filler rod for the joining by welding of dissimilar alloys in the nickel, cobalt, and iron-base alloy high temperature, high strength families, and for weld repair of various nickel, cobalt, and iron-base alloy
Used as a weld filler metal for submerged-arc welding and gas-metal-arc welding (SAW/ GMAW).
The alloy is solid-solution-strengthened and, as such, is not heat treatable. Appropriate heat treatment would be that of the metals being welded.