1.1 ,This specification covers two iron-nickel-cobalt alloys, the former, (UNS No. K94630), containing nominally 29 ,% nickel, 17 ,% cobalt, and 53 ,% iron, the latter, (UNS No. K94620), nominally 27 ,% nickel, 25 ,% cobalt and 48 ,% iron, in the forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics, for vacuum electronic applications. Unless otherwise indicated, all articles apply to both alloys.