304 stainless steel is a common material, a density of 7.93 g / cm3, the industry also known as 18/8 stainless steel. High temperature of 800 degrees, with good workability, high toughness, which is widely used in industrial and medical furniture industry and the food industry. Field common labeling methods have 0Cr18Ni9, SUS304, which generally represents 0Cr19Ni10 GB standards of production, S30408 ??generally represents ASTM standard production, SUS 304 represents JIS standard. 304 is a versatile stainless steel, it is widely used to produce good overall performance requirements (corrosion resistance and formability) of equipment and parts. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium, 8% nickel content. 304 stainless steel is a grade produced in accordance with the ASTM standard stainless steel. Tensile strength σb (MPa) ≥520 Conditions yield strength σ0.2 (MPa) ≥205 Elongation δ5 (%) ≥40 section shrinkage ψ (%) ≥60 Hardness: ≤187HB; ≤90HRB; ≤200HV density ( 20 ℃, g / cm3): 7.93 Melting point (℃): 1398 ~ 1454 the specific heat capacity (0 ~ 100 ℃, KJ · kg-1K-1): 0.50 Thermal conductivity (W · m-1 · K-1) :( 100 ℃) 16.3, (500 ℃) 21.5 linear expansion coefficient (10-6 · K-1) :( 0 ~ 100 ℃) 17.2, (0 ~ 500 ℃) 18.4 resistivity (20 ℃, 10-6Ω · m) : 0.73 longitudinal elastic modulus (20 ℃, KN / mm2): 193 System Description: 304 stainless steel is the most widely used chromium - nickel stainless steel, as a widely used steel with good corrosion resistance, heat resistance, low temperature strength and mechanical properties; stamping, bending and other thermal processing, and no heat treatment hardening (temperature -196 ℃ ~ 800 ℃). Corrosion in the atmosphere, if the industrial atmosphere or in heavily contaminated areas, the need for timely clean to avoid corrosion. Suitable for use in food processing, storage and transport. It has good processing properties and weldability. Plate heat exchanger, bellows, household goods (1,2 tableware, cabinets, indoor pipes, water heaters, boilers, bath), auto parts (windshield wipers, muffler, mold products), medical equipment, building materials, chemical, food industry , agriculture, ship parts, and so on. 304 stainless steel is a nationally recognized food-grade stainless steel. Most of the requirements is to maintain long-term building of the original appearance. In determining when to choose the type of stainless steel, the main consideration is the aesthetic standards required, corrosive and clean up the system to use the location of the atmosphere. However, a growing number of other applications simply seek integrity or impermeability structure. For example, industrial building roof and side walls. In these applications, the construction cost of the owner may be more important than the aesthetic, the surface is not very clean may be. The use of 304 stainless steel effect in dry indoor environment is quite good. However, in rural and urban in order to maintain their appearance in the outdoors, they need frequent cleaning. In heavily polluted industrial areas and coastal areas, the surface will be very dirty, and even rust. But to get an outdoor environment aesthetic effect, it requires the use of nickel-containing stainless steel. Therefore, 304 stainless steel is widely used in curtain wall, side walls, roof and other construction purposes, but in severe erosion of industrial or marine atmosphere, preferably 316 stainless steel. Stainless steel sliding door, it has been fully aware of the use of stainless steel in structural applications superiority. There are several design criteria included in the 304 and 316 stainless steel. Because "duplex" 2205 Yiba good atmospheric corrosion resistance and high tensile strength and proof strength blend, so European guidelines also include the steel. Product shape Indeed, stainless steel is the standard all-metal manufacturing shapes and sizes, and there are many special shapes. The most commonly used product is made of sheet and strip, and plate production with special products, for example, the production of hot-rolled structural steel and extruded structural sections. But there are round, oval, square, rectangular and hexagonal welded or seamless steel tubes and other forms of products, including profiles, rods, wire and castings.