Stainless Steel Tube Can Be Divided Into Two Types

Stainless steel tube can be divided into two types: One is called super stainless steel tube, Nippon Steel YUS270 (20Cr - 18Ni - 6Mo - N) as the representative of corrosion-resistant titanium, and the latest high-corrosion-resistant stainless steel tube. YUS270 the high level of chromium and molybdenum, nitrogen, can be effectively used to improve corrosion resistance, YUS270 between the stainless steel tube and the ferritic stainless steel tube between the thermal expansion coefficient. It can be used in water purification equipment, chemical plants, coastal construction and other serious sodium chloride corrosion. Ferritic stainless steel SUS447J1 (30Cr - 2Mo) is a super stainless steel. Another is a high-purity ferritic stainless steel. By increasing the content of chromium and molybdenum reduce the carbon and nitrogen content, can improve the corrosion resistance and formability. A typical high-purity ferritic stainless steel with Nippon Steel YUS220M in (22Cr - 1.5Mo - titanium niobium), YUS190 and YUS190L (19Cr - 2Mo), other levels of chromium and molybdenum stainless steel tube with slight changes. YUS260 (20Cr - 15Ni - 3Mo - Cu - N), YUS110M (18Cr - 12Ni - 2Si Mo-Cu) and YUS27A - M (17Cr - 7Ni - 2CU - 2Si) is the latest development of high corrosion-resistant stainless steel. To prevent corrosion of titanium and niobium source of non-metallic inclusions precipitated, prompting the formation of passive film of titanium oxide, thereby increasing the corrosion resistance. Nippon Steel has YUS190 and YUS220M use of this technology. It is reported that adding titanium, niobium, and A1 combination can improve the corrosion resistance. And found that the traditional low chromium stainless steel tube of harmful elements to enhance the resistance to intergranular corrosion, its role and nitrogen austenitic stainless steel to improve corrosion resistance of the same effect. Future research to improve the corrosion resistance will focus on control of inclusions and surface coating on the protective coating. High formability stainless steel Ferritic stainless steel tube, plastic is poor. Although the high-strength austenitic stainless steel, but with a high coefficient of thermal expansion, is not conducive to including welding, including the formation. Lower carbon content and nitrogen content can significantly improve the formability, under certain conditions, can improve the deep-drawing performance. For example, SUS430 stainless steel, R = 1.0, while the low-carbon SUS430D R = 1.6, while the elongation rate is stable at 30%. R - rolling YUS436S, a significant improvement, especially after large-diameter rolling, under the right conditions, these new super-ferritic stainless steel SUS304 deep drawing process with different stamping. Ultra-high purity Fe - Cr alloy has good formability, 18% chromium content in stainless steel can be greater than 36% elongation. Stainless steel round tube plate, forging, cold forging the development of new stainless steel SUSMX7 excellent cutting methods to increase production. Also developed to add S, lead, selenium-cutting stainless steel and the critical compression ratio improvement. Lubrication is the study of thin stainless steel tube plate recently. Board can be painted in the absence of oil and organic coating or protective layer formation, improve the working environment and reduce production costs, is expected to have a variety of uses requirements. Nippon Steel in the so-called "Guardooat" organic coating, stainless steel pipe and to develop the East China Sea. Stainless steel, high strength and high hardness High strength and high hardness of structural materials, such as automotive gaskets and pressure plates, for the modification of SUS301L stainless steel tube rail vehicle development. Public works and building components for development, with good corrosion resistance martensitic stainless steel tube YUS550 (13Cr - 2Ni - 2Mo), it can be applied to concrete without punching. SUS316 add nitrogen SUS316FR (16Cr - 12Ni - 2Mo - 0.09N) based on fast breeder reactors can be used for high temperature strength and creep strength is of use. Niobium added ferritic stainless steel YUS180H (19Cr - 0.8Nb) and YUS340 - MS (14Cr - 0.5Mo Steel - 0.3Nb - TI) has a high temperature strength, can be used for automotive exhaust systems. Source: al-metal.org