309S and 310S austenitic stainless steels are often used in high temperature environments. Its high chromium and nickel content ensure good corrosion and oxidation resistance. Therefore, they are widely used in furnace parts in the heat treatment industry, such as: conveyor belts, rollers, furnace heads, refractory backing plates, pipe hangers, etc. These grades are also used in the chemical processing industry to carry hot concentrated acids, ammonia and disulfides. In the food processing industry, these grades are used in contact with hot acetic and citric acids.
309S (23Cr-13Ni) stainless steel has excellent corrosion resistance and strength, and is suitable for parts with a working temperature of 1000 °C. Due to this high temperature resistance, it is also known as: high alloy stainless steel, which has excellent high temperature acid resistance and high temperature strength. Its use is generally widely used in exhaust machines, heat treatment furnaces and heat exchangers.
309S, the national plate number is: 0cr23ni13, and the usable temperature is 900~1000 degrees Celsius.
310S stainless steel is suitable for making various furnace components, the maximum working temperature is 1200 ℃, and the continuous use temperature is 1150 ℃. It is the mainstream steel of the heat-resistant steel series, and the maximum working temperature of 309S is 1050 °C, and it can be used for a long time under a large load at 650-700 °C.
310S, the national plate number is: 0cr25ni20si2, the usable temperature is Celsius: 1000 degrees ~ 1200 degrees.
310S stainless steel is widely used as a stainless steel pipe, and is widely used as a pipeline for transporting fluids, such as oil, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used. For the manufacture of mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, barrels, and shells.