Re: [MW:32495] Cracking of Monel 400 TTS welds

over heated

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Mon, Aug 30, 2021 at 2:12 PM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:

Dear Experts,

We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.

Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk

Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)

Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.

crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,

Jeya Prakash. J

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