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Re: [MW:35245] SA 387 Grade 22 Cl.2 - Welding Crack

By Materials & Welding
Dear, 

From the look of the crack it seems this is a hot crack. The reason of this is likely due to not being able to manage the welding parameters. take care of the following: 

  • Lower the heat input: Adjust welding parameters to reduce heat input, especially given the thin material (6 mm).
  • Ensure uniform weld bead geometry: Aim for a balanced, wider bead to minimize centerline solidification cracking.
  • Verify material cleanliness: Ensure the base metal and filler wire are free from impurities.
  • Monitor preheat and interpass temperatures: Keep the heat input consistent across the entire weld to avoid uneven cooling.
  • Refine welding technique: Control weld speed, clean between passes, and ensure proper FCAW process controls as per the WPS. 

    • keep us updated after following the above please. 

    Thanks, 



    On Wed, Sep 11, 2024 at 1:21 PM williams p wilson <williamswilsonp@gmail.com> wrote:
    Hai Experts,
    Greetings!!

    Hope you are doing well.
    We found crack on Turbine Exhaust Stack butt weld joints made by 6 mm thick, SA 387 Grade 22 Cl.2 

    We repaired with E91T1-B3 with FCAW welding process  with a preheat of 140 degree C , maximum Interpass temp. of 240 degree C.
    But again welding crack observed while doing the MPI, request to please share your comments to solve this matter.


    Thank You & Regards
    Williams P Wilson
    +968-94600828
    QA/QC Engineer
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