Stainless steel tube products first point: general structural steel, structural tubes for short. 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 and mechanical structure with seamless steel tubes, fluid seamless standard applies generally seamless transmission fluid. Fei Yi Steel Co., Ltd. Liaocheng seamless 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 inspection. Therefore, the selection pressure on a standard line pipe, fluid seamless steel pipe should not be used. Seamless expressed in terms of diameter, wall thickness, thick-walled seamless steel pipe is mainly used for machining, mining, hydraulic steel, and other purposes. The second point: the structure 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 the use of structural and mechanical structure, a lot of use in construction, machinery, transportation, aviation, oil exploration and other industries a variety of structural tube. Plus the use of cold drawn seamless stainless steel finish with the production process (up to precision tolerances); stainless steel welded by plasma welding, welding and other processes of production; and implementation of hydraulic, pneumatic test, 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 user specifications to implement comprehensive testing procurement, and may provide relevant reporting requirements. Accept third party inspection! Products sold abroad from various sectors, and was well received. Product diameter, wall thickness tolerances according to: EN ISO 1127; DIN 2391; EN 10305-1, EN 10312 and other requirements; 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, wall thickness of 0.9mm - 6.0mm finish, cold drawn stainless steel seamless pipe Specification: OD 6mm - 480mm; thickness 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 plasma welding, pressure welding Laser 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, etc. The company's products: stainless steel seamless pipe, stainless steel welded pipe; stainless steel tube; stainless steel U-tube, duplex stainless steel, food-grade, sanitary stainless steel tube, stainless steel pipes , boiler tubes, heat pipe, structural pipe, petroleum cracking tubes, chemical piping, machinery, electricity and the pipe, paper tube, pipe newest nuclear-powered stainless steel pipe Executive standard GB / T12771-2008 like. 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. System components can be divided according to Cr (SUS400), Cr-Ni system (SUS300), Cr-Mn-Ni (SUS200) and precipitation hardening systems (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- that is 18/8 stainless steel. 309 - 304 better than temperature resistance. 316 - Following the 304, the second most widely used of steel, mainly for the food industry and surgical equipment, adding Mo to obtain a special corrosion-resistant structure. Better than the 304 because of its 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] Stainless steel bucket Model 321 in addition to the added titanium elements to reduce the corrosion of the weld material properties than the risk of a similar 304. 400 Series - ferritic and martensitic stainless steel 408 - good heat resistance, low corrosion resistance, 11% Cr 409- cheapest model (England), commonly used as automobile exhaust pipe, is a ferritic. 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 materials. 420 - "cutting class" martensitic steel, similar to Brandt's first high-chromium stainless steel this. Also used in surgical tools, you 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 common models: 440A, 440B, 440C, in addition 440F (and easy processing). 500 series - heat-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 common type of precipitation hardening stainless steel models, usually called 17-4; 17% Cr, 4%. Ni. 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