isoca
Materials
- Mar 16, 2008
- 58
Hello everyone,
A customer has asked us to anneal the bends of SS 304 U-bend tubes. As is often the case, he has not specified the treatment conditions.
The treatment will be carried out using electrical resistance equipment (joule effect)
For now we know that it must at least reach 1040 degrees Celsius, however I am not very clear about the time.
As indicated by ASME section VIII, the minimum time is 10 minutes, which seems excessive to me. I have carried out some tests and have observed that 20 seconds (or less) is enough to obtain a structure free of deformation and with an acceptable oxide thickness without the need to remove it.
Anyone know any standard or specification that specifies parameters or give some guidance for this type of treatment?
Thank you very much
A customer has asked us to anneal the bends of SS 304 U-bend tubes. As is often the case, he has not specified the treatment conditions.
The treatment will be carried out using electrical resistance equipment (joule effect)
For now we know that it must at least reach 1040 degrees Celsius, however I am not very clear about the time.
As indicated by ASME section VIII, the minimum time is 10 minutes, which seems excessive to me. I have carried out some tests and have observed that 20 seconds (or less) is enough to obtain a structure free of deformation and with an acceptable oxide thickness without the need to remove it.
Anyone know any standard or specification that specifies parameters or give some guidance for this type of treatment?
Thank you very much