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What are the characteristics of austenitic stainless steel seamless pipe?

Lid sinds 18 nov 2020

Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless pipe and nickel-nickel alloys. One of the products we mainly promote is austenitic stainless steel seamless pipe, let’s introduce it below.

Stainless steel commonly used in vacuum engineering mainly includes two types of austenitic stainless steel and martensitic stainless steel. The most commonly used grades of austenitic stainless steels are 0Crl8Ni9(304), lCrl8Ni9Ti, etc. They are heat-resistant, corrosion-resistant non-magnetic stainless steels, and are widely used in vacuum chamber shells, pipelines, valve bodies, etc.; commonly used Martensite Body stainless steel mainly includes 0Crl3, lCrl3, 2Crl3, 3Crl3, etc., which are mainly used for parts with high toughness and impact load, such as corrosion-resistant vacuum pump blades, shafts, nozzles, valve seats, valve plates, etc., which require a certain degree of hardness and corrosion resistance Occasions.

In high vacuum and ultra-high vacuum systems with a vacuum degree above 1.3×10-4Pa, it is best to use austenitic non-magnetic stainless steel [such as lCrl8Ni9Ti, 0Crl8Ni9(304), etc.] to manufacture the shell, pipe or other parts of the vacuum vessel . This kind of stainless steel has excellent corrosion resistance, low outgassing rate, non-magnetic, good weldability, low conductivity and conductivity, and can work in the range of -270oC to 900oC. And has high strength, plasticity and toughness. It is currently the main structural material used in metal ultra-high vacuum systems.

Austenitic stainless steel can be welded by arc welding, brazing and argon arc welding. Table 3 shows the properties of the most commonly used austenitic stainless steel (Type 304). 304 stainless steel has similar properties to lCrl8Ni9Ti stainless steel. It has very good corrosion resistance, low vapor pressure, low thermal conductivity, and is non-magnetic. These properties make austenitic stainless steel the most commonly used materials for ultra-high vacuum chambers, work holders, brackets, flanges, bolts and nuts, and ultra-high vacuum pumps (ion pumps, cryopumps, adsorption pumps, etc.).

We are forging ahead on the ground, but we also watch the stars and ambitious ambitions. If you want more information, please contact us: manufacturer of super austenitic stainless steel seamless pipe and tube.