304 stainless steel is the most widely used chromium-nickel stainless steel

304 stainless steel is the most widely used chromium-nickel stainless steel [1]. As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It has good hot workability such as stamping and bending. , no heat treatment hardening (use temperature -196 ° C ~ 800 ° C). Corrosion resistant in the atmosphere, if it is an industrial atmosphere or heavily polluted areas, it needs to be cleaned in time to avoid corrosion. Suitable for processing, storage and transportation of food. Has good processing properties and solderability. Plate heat exchangers, bellows, household products (1, 2 tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, mufflers, molded products), medical equipment, building materials, chemicals, food industry , agriculture, ship parts, etc. 304 stainless steel is a nationally recognized food grade stainless steel.

Most of the requirements for use are to maintain the original appearance of the building for a long time. When determining the type of stainless steel to be used, the main considerations are the required aesthetic standards, the corrosive nature of the location atmosphere, and the cleaning system to be used. However, more and more applications are only seeking structural integrity or water impermeability. For example, the roof and side walls of industrial buildings. In these applications, the cost of building the owner may be more important than aesthetics, and the surface is not very clean. The use of 304 stainless steel in a dry indoor environment works reasonably well. However, in rural areas and cities to maintain their appearance outdoors, they need to be cleaned frequently. In heavily polluted industrial areas and coastal areas, the surface can be very dirty and even rusted.

However, in order to obtain an aesthetic effect in an outdoor environment, nickel-containing stainless steel is required. Therefore, 304 stainless steel is widely used in curtain walls, side walls, roofs and other architectural applications, but it is best to use 316 stainless steel in aggressive industrial or marine atmospheres. Stainless steel sliding doors have been well recognized for their superiority in the use of stainless steel in structural applications. There are several design guidelines including 304 and 316 stainless steel. Because "duplex" stainless steel 2205 has a good resistance to atmospheric corrosion and high tensile strength and elastic strength, this steel is also included in the European guidelines. Product shape In fact, stainless steel is manufactured in full-standard metal shapes and sizes, and there are many special shapes. The most commonly used products are made of sheet and strip steel, and special products are also produced from medium and heavy plates, for example, hot-rolled structural steel and extruded structural steel. There are also round, elliptical, square, rectangular and hexagonal welded or seamless steel tubes and other forms of products, including profiles, bars, wires and castings.