T.O. 1-1A-9 TABLE 2-19.  FUSION WELDING CHARACTERISTICS OF NICKEL-CHROMIUM-IRON AND NICKEL ALLOYS. (   CONT’D) ALLOY/DESIGN RECOMMENDED FILLER MATERIAL/SPEC HEAT TREATMENT REMARKS TYPE STRUCTURE  MAT’L ELECTRODE ROD PREHEAT POSTHEAT TREAT CL 3 alloy is similar to  that of (See austenitic stainless steel.  The Re- following measures marks)are required for fusion welding: a.  Keep weld re- straint at a minimum. b.  Hold heat af- fected zone narrow and parent metal as cool as possible when welding wrought products. c.  Maintain alignment.- d.  Use stringer beads.  The same analysis tiller metal should be used to join two pieces of the alloy.  Type 310 stainless or has- telloy W (wire or electrode) are re- commended for joining to other metals. Hastelloy Hastelloy AMS5799 AMS Not re- Alloy can be weld- X X 5798 quired. ed by most common welding methods. Fusion welding of cold worked mat- erial will result in a weld strength equal to that of annealed metal. Fusion welding may be accomplished by metallic arc, inert gas shielded arc, submerged melt and sigma methods.  Welding should be done in a flat position as fluidity of the alloy makes pos- ition welding difficult.  Welds in this alloy retain good ductility. Resistance weld- ing requires spec- ial control; long dwell times with water cooling are recommended to 2-102