For you to elaborate on the basic knowledge of stainless steel materials

    Do you know what products in life are made of stainless steel? For example, the community in the letter box, anti-theft window, cell electric box these are stainless steel materials. But there are many types of stainless steel and materials, today Tiangong logo for everyone to popularize the knowledge of stainless steel materials.

    Stainless Steel material composition: the corrosion resistance of stainless steel depends on the alloying elements contained in the steel. Chromium is to make stainless steel to obtain the basic elements of corrosion resistance, when the chromium content of steel reached about 12%, chromium and corrosive medium oxygen, in the steel surface formation of a very thin oxide film (self-passivation film), can prevent the steel matrix further corrosion. In addition to chromium, commonly used alloy elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc. to meet the various uses of stainless steel structure and performance requirements.

    Stainless Steel Model: 301-Good ductility, used for molding products. It can also be hardened quickly by machining. Good weldability. Abrasion resistance and fatigue strength is better than 304 stainless steel. Model 302-corrosion resistance with 304, because the carbon content is relatively high and thus better strength. Model 303-It is easier to cut by adding a small amount of sulfur and phosphorus to the 304. Model 316-after 304, the second most widely used steel, mainly for the food industry and surgical equipment, add molybdenum elements to obtain a special anti-corrosion structure. As compared to 304 of its better resistance to chloride corrosion and therefore also as a Community letter box to use

Stainless Steel Type: Stainless steel is usually divided into: ① ferrite stainless steel. Chromium-containing 12%~30%. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and the corrosion resistance of chloride is superior to other kinds of stainless steel. ② austenitic stainless steel. Containing more than 18% chromium, but also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. Good comprehensive performance, can withstand a variety of media corrosion. ③ austenitic-ferrite duplex stainless steel. It has the advantages of austenite and ferritic stainless steel, and has superplasticity. ④ martensite Stainless steel. High strength, but poor plasticity and weldability.。