The content of chromium and nickel in 310S stainless steel plate is higher than that in 18-8 stainless steel. In the concentration of 68.4% boiling nitric acid, 18-8 stainless steel corrosion resistance is generally not ideal, but 310S stainless steel plate in 65-85% nitric acid can be used.
For example, 310S stainless steel is widely used in exhaust preheaters, heaters, condensing tubes and equipment for producing uranium oxide from nitric acid.
In addition, 310S stainless steel plate of thermal strength, oxidation resistance and anti - vulcanization function is also outstanding. The highest temperature is 1200 ℃, and continue to application and reach a temperature of 1150 ℃, its heat resistance function to more than 304, 316, 321 strong, such as stainless steel.
And compared with the nickel-chromium superalloy and cobalt-chromium superalloy, its capital advantage is very obvious. However, some aspects are difficult to control in the production, one is poor thermal conductivity, thermal conductivity as long as 58% of 304 stainless steel, 47% of chromium 17, continuous casting billet hot crack tendency;
The other is the severe dendrite segregation, hot rolling heating maximum temperature will have some constraints, high temperature deformation resistance, low thermoplastic, in the rolling process is relatively simple cracking; The third is the tendency of chromium-carbide and sigma phase precipitation.
In the actual production, taking the internal wall cracking of 310S stainless steel plate tube with diameter of 90mm produced by electric furnace, LF refining furnace, continuous casting and hot rolling as an example in the process of thermal perforation, it indicates that 310S stainless steel plate tube has internal wall cracking. The main reason of pipe cracking was found out and the improvement measures were put forward.