In terms of high temperature resistance or corrosion resistance, compared with 304, it has better high temperature resistance or corrosion resistance, which is irreplaceable. In addition, from the classification of stainless steel, the metallographic structure of special stainless steel is a stable austenitic metallographic structure.

　　Because this special stainless steel is a high-alloy material, the manufacturing process is quite complicated. Generally, people can only rely on traditional processes to manufacture this special stainless steel, such as infusion, forging, rolling, and so on.

　　In many fields, such as:

　　1, Ocean: Marine structures in the marine environment, seawater desalination, mariculture, seawater heat exchange, etc.

　　2, the field of environmental protection: thermal power generation flue gas desulfurization device, waste water treatment, etc.

　　3. Energy field: nuclear power generation, comprehensive utilization of coal, ocean tide power generation, etc.

　　4, petrochemical industry: oil refining, chemical and chemical equipment, etc.

　　5, food field: salt making, soy sauce brewing, etc.

　　In many of the above fields, ordinary stainless steel 304 is not competent. In these special fields, special stainless steel is indispensable and cannot be replaced. In recent years, with the rapid development of the economy and the continuous improvement of the industrial level, more and more projects require higher-grade stainless steel — special stainless steel (super stainless steel, nickel-based alloy).

　　Some representative special stainless steels are:

　　1, super stainless steel, that is to say, a special stainless steel containing about 6% molybdenum,

There are more than ten kinds of steel in the world. It is also called 6 molybdenum stainless steel. For example, its main component is; 25Ni-23Cr-5.5Mo-0.2N

　　2, Incoloy alloy, such as Incoloy 800, its main composition is; 32Ni-21Cr-Ti, Al

　　3, Inconel, such as Inconel 600, its main composition position; 73Ni-15Cr-Ti, Al

　　4, Hastelloy, such as C-276, its main composition position; 56Ni-16Cr-16Mo-4W

　　5, Monel alloy, such as Monel 400, its main composition level; 65Ni-34Cu

In the above examples, if ordinary stainless steel (304) is used instead of special stainless steel, ordinary stainless steel (304) is not suitable for such a high temperature or high corrosive environment, and the material will corrode immediately or undergo high temperature oxidation. . Therefore, special stainless steel is the best choice in many environments that require high temperature resistance and corrosion resistance. Special stainless steel surpasses the previous stainless steel category and has outstanding and extraordinary performance. Whether it is today or in the future, special stainless steel materials are in endless demand.