This is the fastest-growing application field of stainless steel at present. Using high-strength stainless steel to make the car body structure can greatly reduce the weight of the car and enhance the strength of the car body structure. Using stainless steel as the panel and decorative parts of the car can reduce the maintenance cost.
People pay more and more attention to the pollution of water during its storage and transportation. A large number of practices have proved that stainless steel is the best material for water industry such as water preparation, storage, transportation, purification, regeneration and seawater desalination. Its advantages are: corrosion resistance, earthquake resistance, water saving, sanitation (no rust and copper green), light weight (reduced 1/3), less maintenance, long service life (40 years), low life cycle cost (LCC), and it is a recyclable green environmental protection material.
It is one of the earliest applications of stainless steel. In terms of architectural decoration, at present, stainless steel is mainly used in the cladding of external walls, indoor and external columns of high-rise buildings, internal and external decoration and components such as handrails, floors, elevator siding, doors and windows, curtain walls, etc. After surface treatment, coloring and coating, the stainless steel plate has solved the problems of easy handprint after touching, and further expanded the application scope of stainless steel.
In the home appliance industry, stainless steel is widely used in automatic washing machines, water heaters, microwave ovens and refrigerators, and ferritic stainless steel is mostly used.
Industrial waste gas, garbage and sewage treatment devices need to be made of stainless steel.
In the process of flue gas desulfurization, in order to resist the corrosion of sulfur dioxide, chloride ion and iron ion, duplex stainless steel and high-grade austenitic stainless steel are needed in absorption tower, cooler, pump, valve and flue. Facilities such as garbage incinerator and wastewater treatment need to be made of high-performance stainless steel.
The proportion of stainless steel used in industrial facilities in developed countries can generally reach 15%-20%, but the proportion of stainless steel used in China is still very small at present. On the one hand, this is due to the complete set of imported industrial equipment, stainless steel materials are not counted, on the other hand, domestic materials have not been adopted. Stainless steel is needed in chemical industry, petrochemical industry, chemical fiber, paper making, food, medicine, energy (nuclear power, thermal power, fuel cell) and other fields. In addition, the existing imported equipment has entered the maintenance period. With the improvement of the quality of domestic stainless steel products and the development of special brand products, the application of stainless steel in domestic industrial facilities will increase year by year.