Overall heat treatment of stainless steel equipment
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We received a stainless steel device with a diameter of φ700, made of material S30408, and a design pressure of 6.3 MPa； Why is it required that the equipment undergo overall solution treatment after completion? Generally, stainless steel does not require heat treatment.
Yes, mainly to eliminate the tendency for intergranular corrosion.
The medium is boiler feed water, so there should be little corrosion.
Hehe, there are many people asking such questions; a mechanical reply of “Is there?” is enough ”. Yes, if you want it, ask the person who is asking you for it for the best one. Otherwise it’s shooting in the dark; you can resist it. . . . . This is from a management perspective. From a technical perspective, you can search for this term online; there are clear explanations available. For reference.
This device seems to have rather strict requirements; generally, after welding, products develop heat-affected zones, and the corrosion resistance of these areas is reduced. However, through solution treatment, the properties of the heat-affected zones can be restored to an optimal level.