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 TYPE ELECTRODE ROD PREHEAT POSTHEAT MATERIAL TREAT avoid coring or crystal segregation and to develop a full nugget. For seam welding an intermittent drive is recommended to prevent cracking and excessive dis tortion. Monel 1K500 Nr44K See This alloy can be Monel Remarks. welded by oxy acethylene, inert Nr30K gas tungsten arc, Monel or metallic arc processes using proper filler rod. For oxyacetylene welding use NR44K monel gas welding wire with a paste flux. The oxyace tylene name should be reducing and heated end of Filler rod should be kept in the pro tecting atmosphere of the flame to a void oxidizing the rod. For metallic arc welding, use NR- 34K monel. Welding should be preformed on an nealed material and the welded as sembly should be stress relieved before aging. Weld ed assembly should be taken through the age hardening range quickly. Rene REM 41 AMS Not re- See Re- Alloy can be fusion 41 Hastelloy 5800 quired. Marks welded it copper "W" MIL-R and gee backing CL 12 with a tight hold down is used. Start and finish should be made on metal tabs of the same thickness wing inert gas atmoa 2-103