Limit to rewelding monel
Limit to rewelding monel
(OP)
If a part was welded, the welds were machined down and the part was rewelded again, then how many time can this be done. I understand each time the welding and machining changes properties in the metal, other than visual inspection is there any limits to the number of times this can be done. I am many concerned with Monel 400 but would like to know if there is a test regardless of the material. Should a hardness or chemical analysis test be done. How would I unsure that I have changed an astm standard for the material, fitting or piping. Is there any ASTM, AWS or ASME specifications which limit the number of rewelds in the same area.





RE: Limit to rewelding monel
RE: Limit to rewelding monel
Machining down into sound material (even if it weld metal) will help assure that you get a solid repair.
Except,
1. There is a risk of contamination each time you weld.
2. The weld filler will be slightly different composition from the original material.
In metals where the heating and cooling will change the properties then you need to think about re-heat treating the parts after the repair.
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Plymouth Tube
RE: Limit to rewelding monel
RE: Limit to rewelding monel
Thanks
RE: Limit to rewelding monel
An absolutely incorrect statement regarding welding Grade 91 material.
RE: Limit to rewelding monel
There is no hard and fast rule on re-welding, but if you can tell then it is not acceptable.
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Plymouth Tube
RE: Limit to rewelding monel