Pipe Fittings Sanitary Tp304 904L Asme Sa213 Stainless Steel Tube is now more and more widely used. Due to its good corrosion resistance it plays a vital role in engineering construction. During the production process we need to pipe Fittings Sanitary Tp304 904L Asme Sa213 Stainless Steel Tube undergoes solution treatment. The main purpose is to obtain a certain amount of martensite to increase the hardness of the product. Let’s take a look at the solution treatment of Pipe Fittings Sanitary Tp304 904L Asme Sa213 Stainless Steel Tube:

(1) The intermediate aging method is heated to (760±15)℃ after solid solution treatment and kept for 90 minutes. Because Cr23C6 carbide precipitates from the austenite, the carbon and alloy element content in the austenitic 904L stainless steel pipe is reduced. , raise the Ms point to 70°C and then cool to room temperature to obtain the martensite + α ferrite + retained austenite structure. The residual austenite will be decomposed after subsequent aging at 510°C.

(2) High temperature adjustment and cryogenic treatment method: After solid solution, it is first heated to 950°C and kept for 90 minutes. Due to the increase in the Ms point, a small amount of martensite can be obtained by cooling to room temperature; then, a certain amount of martensite can be obtained by cold treatment at -70°C and kept for 8 hours. Amount of martensite.

(3) After solution treatment by cold deformation method, cold deformation is performed at room temperature. The amount of martensite formed in the 904L seamless pipe during cold deformation is related to the amount of deformation and the composition of the 904L stainless steel pipe.

The above three methods are commonly used solution treatment methods for stainless steel pipes. I hope they can be helpful to everyone.