Why 304 stainless steel is essential for solution heat treatment?

Solid solution treatment Stainless Steel sees the healing process up to a temperature of about 950. Dissolving austenite structure of carbides and alloying elements to save heat at 1150 °C for a long time. It plays an important role in quality and cost control in production.

It is necessary to adopt a solid solution in the stainless pipe fitting and flange maker production process. Some Stainless Steel Forged Fittings manufacturer did not adopt solution heat treatment but only used blasting sand and other methods to save costs and cover defects of pipe fittings and flanges, which pose a safety risk to users. 

Features of solution treatment of 304 stainless steel flange

The machining and welding process, the metal's molecular structure, and the magnetic and physical properties of the ASME B16.47 Flange have changed. The gas-solid solution protected process obtains the required hardness and the best austenitic properties, and after processing the effect can restore corrosion resistance. There is a series of good improvement effects like 304 flange after solution heat treatment by Carbon Steel Fittings manufacturer.

1. Under stainless steel ASTM A234 WPB, the flange is easy to process and install. It eliminates the phenomenon of modification of the processing process to reduce the hardness of stainless steel. It also improves the plasticity and toughness of stainless steel.
2. Strengthens intergranular corrosion resistance and emphasizes penetration resistance of corroded ASTM A420 WPL6stainless steel. The 1100 ° solid solution improves the corrosion resistance of hot water austenitic stainless steel. It can suppress carbides' production and then rapidly cool to room temperature to supersaturate the carbon of stainless steel.
3. Removes magnetic properties of stainless steel during processing and stabilizes austenite structure says Carbon Steel Flanges manufacturer. Solution heat treatment is the stage of complete melting, solid solution strengthening, and stress elimination to continue processing in the stainless steel alloy.
4. Restores the natural brightness of the surface of ASTM A105 Flanges stainless steel. Flanged solid solution gas protection is used to avoid the formation of viscous iron oxides on the stainless steel surface in the process, thus reducing the brightness and improving the stainless steel surface's reputation appearance.

Three Factors Affecting Solid Solution of 304 Stainless Steel Flange

The solid solution treatment of ASTM A350 LF2 Flanges greatly influences corrosion resistance, appearance brightness, and processing performance. 

1. Solution temperature. According to Carbon Steel Forged Fittings manufacturer, the chemical composition of stainless steel, stainless steels solution temperature must reach 950-1150 °C to produce the softening phenomenon. At this point, the hardness decreases to less than 220HV. Meets pipe mounting requirements. If temperature control is not reasonable, it is easy to see all kinds of quality defects.
2. Solid solution time. During the heating of Alloy Steel Fittings, the amount of residual ferrite in the steel decreases with increasing heating time. Approximately 1050 ℃ of 304 flanges solid solution, the saturated carbon condition, and solid solution effect should be achieved. The treatment should be controlled by the rapid cooling of air to improve the corrosion resistance. 
3. Solid solution rate and insulation. The low thermal conductivity of Alloy Steel Flanges is only 27% that of carbon steel at room temperature. So the stainless steel in the low-temperature healing process will slow down.