Hi JP,
Monel being critical material from welding point of view, we have to take care of general good engineering practices like sequence of welding, proper shielding by inert gas, control of heat input, the gap (if any) between tube and tube sheets, etc. In sequence of welding try to weld the joint in multiple segments with sufficient overlaps from starting to end points. Many time the cracks develops due to minor things those are very critical to particular materials.
Thanks,
Best Regards,
Rajnish Dixit
Monel being critical material from welding point of view, we have to take care of general good engineering practices like sequence of welding, proper shielding by inert gas, control of heat input, the gap (if any) between tube and tube sheets, etc. In sequence of welding try to weld the joint in multiple segments with sufficient overlaps from starting to end points. Many time the cracks develops due to minor things those are very critical to particular materials.
Thanks,
Best Regards,
Rajnish Dixit
On Monday, 30 August, 2021, 02:12:08 pm IST, 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
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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