Austenitic stainless steel, austenitic stainless steel material is at room temperature with austenitic stainless steel of the organization. Contains about 18% of Cr, Ni in steel by 8% ~ 10%, about 0 C. 1%, has the stable austenite organization. Austenitic chromium nickel stainless steel including the famous cr - 18 8 Ni steel and on this basis, increase the content of Cr, Ni and Mo, Cu, Si, Nb, Ti elements such as high Cr - developed Ni steel series. Austenitic stainless steel nonmagnetic and has high toughness and plasticity, but strength is low, cannot by phase transformation strengthening, can only through the cold working reinforcement, such as S, Ca, Se, Te elements, such as good free cutting. Austenitic stainless steel features such steel in addition to the acid medium corrosion resistance to oxidation, if contain Mo, Cu element also ability such as sulfuric acid, phosphoric acid and the corrosion of formic acid, acetic acid, urea, etc. If the carbon content of steel is lower than 0. 03% or containing Ti, Ni, can significantly improve the intergranular corrosion resistance. High silicon austenitic stainless steel in nitric acid have good corrosion resistance. Because the austenitic stainless steel has comprehensive and good comprehensive performance, widely used in all walks of life. Austenitic stainless steel type austenitic stainless steel in Germany in 1913, has played a most important role in stainless steel, its production and consumption accounts for about 70% of production and consumption of stainless steel. Austenitic stainless steel grade and, most commonly used brand has more than 40, the most common is 18 8. ( 1) 1 cr17mn6ni15n; ( 2) 1 cr18mn8ni5n; ( 3) 1Cr18Ni9； ( 4) 1Cr18Ni9Si3； ( 5) 06Cr19Ni10( 0Cr18Ni9) ; ( 6) 00Cr19Ni10； ( 7) 0 cr19ni9n; ( 8) 0Cr19Ni10NbN； ( 9) 00 cr18ni10n; ( 10) 1Cr18Ni12； ( 11) 0Cr23Ni13； ( 12) 0Cr25Ni20； ( 13) 0Cr17Ni12Mo2； ( 14) 00Cr17Ni14Mo2； ( 15) 0Cr17Ni12Mo2N； ( 16) 00Cr17Ni13Mo2N； ( 17) 1Cr18Ni12Mo2Ti； ( 18) 0Cr18Ni12Mo2Ti； ( 19) 1Cr18Ni12Mo3Ti； ( 20) 0Cr18Ni12Mo3Ti； ( 21) 0Cr18Ni12Mo2Cu2； ( 22) 00Cr18Ni14Mo2Cu2； ( 23) 0Cr19Ni13Mo3； ( 24) 00Cr19Ni13Mo3； ( 25) 0Cr18Ni16Mo5； ( 26) 1Cr18Ni9Ti； ( 27) 0Cr18Ni10Ti； ( 28) 0Cr18Ni11Nb； ( 29) 0 cr18ni13si4200 series: chromium - Nickel - Chromium manganese austenitic stainless steel 300 series: - Nickel austenite stainless steel model 301: good ductility, used for forming products. Also can rapid hardening by mechanical processing. Good weldability. Abrasion resistance and fatigue strength is better than that of 304 stainless steel products such as: springs, steel structure, the wheel cover. Model 302: corrosion resistance with 304, due to the carbon intensity of relatively high and better. Model 303: by adding a small amount of sulfur and phosphorus from 304 are more likely to machining. Model 304: general type; The 18/8 stainless steel. Products such as: corrosion resistant containers, tableware, furniture, railings, medical equipment, some mobile phone frame. Typical composition is 18% chromium and 8% nickel. Is non-magnetic, unable to borrow by heat treatment to change its metallographic structure of stainless steel. Model 304 L: same as the 304 features, but low carbon is more resistant to corrosion, easy to heat treatment, but the poor mechanical for welding and heat treatment of the product. Model 304 N: same as the 304 features, is a kind of stainless steel containing nitrogen, and nitrogen is in order to improve the strength of the steel. Model 309: over 304 have better temperature resistance. Model 309 S: more amount of chromium, nickel, so the heat resistance, oxidation resistance, products such as: heat exchanger, boiler components, jet engine. Model 310 S: most content of chromium, nickel, so the best heat exchanger, boiler, heat resistance, oxidation resistance components, electrical equipment. Model 316: after 304, the second to get the most widely used types of steel, mainly used in the food industry and surgical equipment, add molybdenum elements make it get a kind of corrosion resistant special structure. As compared with 304, it has a better ability to resist chloride corrosion and therefore as 'Marine steel' to use. SS316 is usually used for nuclear fuel recycling equipment. 18/10 grade stainless steel usually also fits the application level. Used in chemical, the sea, ship assembly, easy corrosion environments such as building materials. Model 316 L: low carbon is more resistant to corrosion, easy to heat treatment, products such as chemical processing equipment, nuclear power generators, coolant reservoir. Model 321: except for added titanium to reduce the risk of weld material corrosion besides other performance similar to 304, suitable for welding brewing equipment, steam pipe, aviation parts. Model 347: add niobium stabilization element, suitable for welding aviation equipment parts and chemical equipment. Strict sense, as the manganese in the 200 series stainless steel electrode potential role in the steel is not big, formation of the protective oxide film is very low, cannot have corrosion effect, therefore, manganese alloying austenitic stainless steel, not the real 'stainless steel'. At present many domestic manufacturers in costs, reduced chromium and nickel in stainless steel, increased the content of manganese. Expert thinks, stainless steel can not rust, is because of the presence of chromium and nickel, reduce the content of these two components can reduce rust resistance. Austenitic stainless steel GB standard grade contrast ( ) ASTM( The United States) JIS( Japan) DIN( Germany) 1Cr17Ni7 301 SUS301 X12CrNi1771Cr18Ni9 302 SUS302 X12CrNi1881Cr18Ni10 303 SUS303 X12CrNiS1880Cr18Ni9 304 SUS304 X5CrNi18900Cr19Ni10 304L SUS304L X2CrNi1890Cr17Ni12Mo2 316 SUS316 X5CrNiMo181000Cr17Ni14Mo2 316L SUS316L X2CrNiMo18100Cr18Ni10Ti 321 SUS321 X10CrNiTi1890Cr19Ni13Mo3 317 SUS317 X2CrNiMo1816