Under what conditions can austenitic stainless steel containers be heat-treated?
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Hello everyone, may I ask under what conditions can austenitic stainless steel containers be heat-treated?
Article 74 of the Code: Welded austenitic stainless steel or non-ferrous metal pressure vessels generally do not require heat treatment. If heat treatment is necessary due to special requirements, it shall be specified in the drawings.
In situations involving what’s known as intergranular corrosion, is it necessary to carry out processes like solution treatment and stabilization?
Could you give an example of a situation where heat treatment is required? I’m also learning*, thank you!
I just want to know under what operating conditions do austenitic stainless steel containers need to be heat-treated?
Unless the customer or the drawings require heat treatment for the austenitic stainless steel containers, solution treatment is necessary in special operating conditions where the medium has a tendency to corrode the containers. The specifications provide detailed details; it is still necessary to first become familiar with the standards.
Thank you. I’ve checked the standards. If the customer doesn’t specify any requirements, as a designer, under what circumstances should heat treatment be specified for austenitic stainless steel containers on the drawings? Could you give an example of a situation where heat treatment is necessary, either one you’ve seen or one you know requires it? Thank you very much
In the case of intergranular corrosion, stainless steel requires re-solution heat treatment (if it has been damaged) and stabilization heat treatment.
Stainless steel equipment can also be heat-treated, by strictly controlling the temperature between 300 and 400°C. Heat treatment can reduce welding residual stress.
Try not to perform heat treatment when corrosion resistance is required
No heat-treated stainless steel equipment was seen on site, which is a special case. Is the poster in equipment design?