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  1. gilley29

    409SS weld then forming problems

    Thanks for the NIDI source - doc 9002 has some good SS info.
  2. gilley29

    Welding then forming 409SS problems

    It's actually a ferritic grade. NIDI recommends no preheat for thin gauge. They recommend annealing at 1450F then slow cool to 1100F, than a rapid cool. Slow room temp cooling induces brittleness (i guess). Thanks for your response.
  3. gilley29

    Welding then forming 409SS problems

    Weld seam cracks after roll forming a flange. Process: Rolling a cylindrical tank with 14 ga 409SS sheet and using SAW for the butt weld seam. Filler is ER309LSI and flux is ST-100. After the seam weld, a .4" deep flange (rough...
  4. gilley29

    Welding then forming 409SS problems

    Weld seam cracks after roll forming a flange. Process: Rolling a cylindrical tank with 14 ga 409SS sheet and using SAW for the butt weld seam. Filler is ER309LSI and flux is ST-100. After the seam weld, a .4" deep flange (rough...
  5. gilley29

    Welding then forming 409SS problems

    Weld seam cracks after roll forming a flange. Process: Rolling a cylindrical tank with 14 ga 409SS sheet and using SAW for the butt weld seam. Filler is ER309LSI and flux is ST-100. After the seam weld, a .4" deep flange (rough...
  6. gilley29

    Welding then forming 409 SS problems

    Weld seam cracks after roll forming a flange. Process: Rolling a cylindrical tank with 14 ga 409SS sheet and using SAW for the butt weld seam. Filler is ER309LSI and flux is ST-100. After the seam weld, a .4" deep flange (rough cross section below) is roll formed on the top edge of the...
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