Stainless steel tube product information on the first point: the general structural steel, referred to as structural tubes. This standard replaces GB / T8162-2008 "structure seamless steel pipe." This standard compared with GB / T8162-2008, the main changes are as follows: the structure, this standard applies to the general structural, mechanical structure with a seamless, fluid seamless steel standard applies generally seamless transmission fluid. Yi Fei Steel Co., Ltd. Liaocheng seamless steel supply structure. The main difference is the structure of seamless steel pipe seamless steel pipe by root hydraulic fluid test or ultrasonic, eddy current, magnetic flux leakage testing. Therefore, the selection pressure on a standard line pipe, fluid seamless steel pipe should not be used. Seamless steel pipe representation for diameter, wall thickness, thick-walled seamless steel pipe is mainly used for mechanical processing, mining, hydraulic steel, and other purposes. The second point: structural pipe standard GB / T8162-1999, ISO2937, ASTM A53, ASTM A106, JIS G 3441, BS EN 10210-1 third point: structural tubes for general purposes, including use of structural and mechanical structure, a lot of use in construction, machinery, transportation, aviation, oil and other industries a variety of structural tube. Add cold drawn seamless stainless steel finishing process combines the use of production (up to high-precision tolerances); stainless steel welded using plasma welding, welding and other processes of production; and implementation of hydraulic, pneumatic testing, eddy current testing, the physics and chemistry detection : including elongation, tensile strength, mechanical properties, microstructure analysis, intergranular corrosion, hardness testing and other requirements, according to the user to implement a comprehensive procurement specification testing, and may provide relevant reporting requirements. Also accept third party inspection! Products sold abroad from various sectors, and was well received. Product diameter, wall thickness tolerances can: EN ISO 1127; DIN 2391; EN 10305-1, EN 10312 and other requirements of production; food grade, sanitary stainless steel tube: diameter 16mm-102mm, wall thickness of 0.5mm --- 4.0 mm; Executive Standard: ASTM A270, DIN 11850 stainless steel tube specifications: diameter 15.9mm (16); 25mm (25.4); 31.8mm (32); 38mm (38.1); 50.8mm; stainless steel U-tube specifications: diameter 15.88mm - 114.3mm, the wall thickness of 0.9mm - 6.0mm finishing, cold drawn stainless steel seamless pipe specifications: OD 6mm - 480mm; thickness of 0.7mm --- 30mm. Executive Standard: GB13296-2007; GB / T14976-2002; GB / T14975-2002; ASTM / ASME A213 / A312 / A269 / A789 / A790 / B677, EN10216-5, DIN17458, EN ISO 1127 and so on plasma welding, pressure welding Laser automatic welding stainless steel pipe specifications: diameter 12mm --- 1220mm; wall thickness of 0.5mm --- 25mm. Implementation of the standards: GB / T12770-2000, GB / T12771-2000; HG20537; ASTM / ASME A249 / A269 / A270 / A312 / A554 / A688 / A778 / A789; EN10217-7; EN10312; DIN17455; DIN17457; EN ISO 1127; DIN ISO 1127, JIS G3459, JIS G3463, JIS G 3468, such as the company's products: stainless steel seamless pipe, stainless steel pipe; stainless steel tube; stainless steel U-tube, duplex stainless steel, food grade, sanitary stainless steel pipes, stainless steel pipes , boiler tubes, high temperature pipe, structural pipe, oil cracking pipe, chemical pipe, mechanical pipe, electrical pipes, paper tubes, pipes newest nuclear-powered stainless steel pipe Executive standard GB / T12771-2008 and so on. Three: Stainless steel grade grouping precipitation hardening stainless steel. With good formability and good weldability, high strength materials as used in the nuclear industry, aviation and aerospace industry. Components can be divided according to Cr (SUS400), Cr-Ni system (SUS300), Cr-Mn-Ni (SUS200) and precipitation hardening system (SUS600). 200 Series - chromium - nickel - manganese austenitic stainless steel 300 Series - chromium - nickel austenitic stainless steel 301 - scalability for molding products. It can also be rapidly hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength than 304 stainless steel. 302 304 with corrosion resistance, due to relatively high carbon intensity and therefore better. 303 - by adding a small amount of sulfur and phosphorus to more than 304 cutting. 304- namely 18/8 stainless steel. 309 - 304 - better temperature resistance. 316 - After 304, the second most widely used of steel, mainly used in the food industry and surgical equipment, add molybdenum to obtain a special corrosion-resistant structure. Than the 304 because it has better resistance to chloride corrosion and thus as "marine steel" to use. SS316 is often used to fuel recovery. 18/10 grade stainless steel is usually in line with the application level. [1] In addition to stainless steel bucket Model 321 added titanium elements to reduce the risk of material other than the corrosion of the weld performance similar to 304. 400 Series - ferritic and martensitic stainless steel 408 - good heat resistance, low corrosion resistance, 11% Cr 409- cheapest model (BAR), commonly used as automobile exhaust pipe, is a ferrite. stainless steel (chrome steel). 410 - martensite (high strength chrome steel), good wear resistance, corrosion resistance is poor. 416 add sulfur to improve the processing performance of the material. 420 - "Cutting Class" martensitic steel, similar to Brandt's first high-chromium stainless steel this. Also used in surgical tools, can do very light. 430 ferritic stainless steel, decorative, such as for car accessories. Good shape, but heat resistance and corrosion resistance worse. 440 - high strength cutting tool steel, carbon slightly higher, after appropriate heat treatment to obtain a higher yield strength and hardness up to 58HRC, are among the most hard stainless steel. The most common application example is the "razor blades." There are three commonly used models: 440A, 440B, 440C, in addition to 440F (easy processing). 500 series - resistant chromium alloy steel. 600 Series - martensitic precipitation hardening stainless steel. The latest implementation of the standard stainless steel welded pipe GB / T12771-2008630- most commonly used precipitation hardening stainless steel models, often called 17-4; 17% Cr, 4%. Ni. 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