Stainless steel-----Development Application and Development Trend of stainless steel products
Global stainless steel production , about 76% belong to the 300 series , which the international nickel price fluctuations in the price of nickel -chromium stainless steel is quite large . Between the past year , rising raw material prices of nickel , nickel- chromium makes relatively substantial growth in steel costs, leading consumers have to actively look for alternatives , some markets have been replaced by alternatives. In recent years, low chromium stainless steel and nickel-based stainless steel ( eg 200 series ) the gradual development of attention by the parties . Looking to the future , the proportion of low- chromium -nickel stainless steel and consumption will have to increase.
200 series stainless steel (Cr-Mn-Ni system )
A serious shortage of nickel supply during World War II , Germany developed the first manganese - nitrogen instead of part of the nickel stainless steel. Since the 1950s, the United States also a shortage of nickel raw materials , in-depth study , successfully developed a series of high-manganese austenitic stainless steel , or 200 stainless steel . 200 series steels commonly include : AISI 201 (16% ~ 18% Cr, 5.5% ~ 7.5% Mn, 3.5% ~ 5.5% Ni, <0.25% N), 202,205 and India J1, J4 ( containing Cu) and other costs 25% lower than the 304 for the general purposes of weak corrosive environments such as utensils , kitchenware , interior decoration , etc., its poor weldability. Recently, the U.S. developed 204Cu (3% Cu), compared with 304 stainless steel , high strength , cold performance is more excellent corrosion resistance and 304 rather , it may become widely used to replace 304 stainless steel varieties.
400 series traces the development trend of adding Nb, Ti, Cu, Al improving deep drawability , weldability, corrosion resistance, antimicrobial resistance and high temperature strength, etc. , can be partially replaced by 304 , a major steel : SUS430LX, 430JIL, 444 , 445M2, NSS 477M1 and so on. United States and Japan have been widely used in automotive exhaust pipes ( 409, 410 ) , the washing machine drum ( 430 ) , kitchenware , household appliances , medical equipment , water heaters , roofs , walls, plants and so on.
High chromium duplex stainless steel is low nickel stainless steel , both austenitic stainless steel with excellent toughness and weldability of ferritic stainless steel high yield strength and resistance to chloride stress corrosion , the largest amount of SAF 2205. Duplex stainless steel to reduce the development trend of nickel , manganese and nitrogen to improve . The second -generation duplex stainless representatives Avesta . Bolalite developed LDX2101. Corrosion resistance equivalent to 316 , the intensity is 304 2 times , mechanical properties and 2205 considerable potential applications includes : steel , bridges, tanks , containers , trains structure , water heaters , etc....