20 # 20 # seamless steel pipe seamless steel pipe manufacturer manufacturer of large diameter thick-walled seamless steel pipes of small diameter seamless steel pipe cold drawn precision tubes precision light pipe thin-walled seamless hot-rolled pipes of large diameter thick-walled seamless steel pipe Small diameter thick-walled seamless steel pipe large-diameter thin-walled small-diameter thin-walled steel pipe fluid structure of pipe fertilizer capillary tube high-pressure boiler tubes cold drawn precision steel thin-walled seamless steel pipe of large diameter thick-walled large-diameter high-pressure pipe large thin-walled tube diameter thick-walled seamless steel coil tube finishing precision finishing of carbon steel seamless pipes of precision seamless tube light tube blank steel hot-rolled seamless steel pipe sleeve sleeve sleeve special tube for precision small-caliber precision steel tubes GB non-standard seamless seamless seamless seamless Seamless Steel Tube Fengbao 5310 Baosteel seamless seamless seamless gb8162 gb8163 3087 seamless seamless seamless steel pipe specifications table 20 # 45 # 16mn seamless steel pipe material is, after they finished above you can bring materials such as hair recurrent large-diameter seamless steel pipe manufacturer; large-diameter seamless steel pipe spot prices this is a title, keyword is the large-diameter seamless steel pipe After the price of large-diameter seamless steel pipe factory price of large-diameter seamless steel pipe manufacturers made the word you can bring materials such as 20 # recurrent large-diameter seamless steel pipe manufacturer; 20 # large diameter seamless steel pipe prices this is a title or 45 # large-diameter seamless steel pipe manufacturer; 45 # large diameter seamless steel pipe prices or 16mn large diameter seamless steel pipe manufacturer; 16mn large diameter seamless steel pipe Spot keywords are enough hair for a long time, even if the finished You can also bring regions, such as Fuzhou large-diameter seamless steel pipe manufacturer; a lot of large-diameter seamless steel pipe prices Fuzhou countries and regions, also made enough for a long time, the company is a production, processing and sales in one seamless large-scale business, annual sales: a variety of major steel production of Chengdu Iron and Steel Group, Daye Steel Group, Liaocheng Steel, Baosteel Group, Anshan Iron and Steel Group, Tianjin Seamless, Xining Te steel, Wuxi Steel, Hengyang Steel and other non- seam steel and alloy pipe. It has formed the annual inventory turnover of more than 3,000 tons, more than 800 kinds of specifications. The sale of products implementing national standards. Material: 20 #, 45 #, 40Cr, 16Mn, 27SiMn, 20CrMoTiH, GCr15,15CrMo, 12Cr1MoV, 20CrMo, 35CrMo, 42CrMo, 201,202,301,304,321,316,316L, 310S, 347 630 904 904L and other non- seam tubes and alloy tube stainless steel tube stainless steel plate stainless steel coil, the implementation of standards: Structural pipe: GB / T8162-2008 fluid tubes: GB / T8163-2008, low pressure boiler tubes: GB3087-2008, high-pressure boiler tubes: GB5310-2008 , fertilizer dedicated pipe: GB6479-2000, oil cracking pipe: GB9948-2006 like. It applies to: all areas of construction, mining, textile, electric power, boilers, machinery, military and other. The company's customer-focused, quality of corporate lifeline, in good faith for the administration of enterprises, earnestly adhere to the: honesty, quality and cheap, the business philosophy welcome new and old customers to negotiate business 20 # seamless steel pipe made of 20 # steel, higher strength than the 15th steel, very little quenching, temper brittleness. The high cold deformation plasticity, usually for bending, rolling, curved edges and hammer arch processing, welding performance 20 # seamless arc and resistance welding, gas welding small thickness, shape requires strict or complex shape parts prone cracks occur. Machinability drawn or normalizing state than the annealed condition is good, generally used for manufacturing large discontinuity toughness requirements. 20 # seamless steel pipe material: high-quality carbon structural steel Grade: 20 Steel Standard: GB8162-2008GB / T8163-2008GB3087-2008GB9948-2006GB5310-2008 intensity higher than that on the 15th of steel, very little quenching, temper brittleness. Cold deformation crack-prone plastic high, usually for bending, welding performance rolling, curved edges and hammer arch processing, arc and resistance welding, gas welding small thickness, shape requires strict or complex shape parts. Machinability drawn or normalizing state than the annealed condition is good, generally used for manufacturing large discontinuity toughness requirements. 45 GB of seamless steel pipe is called, JIS called: S45C, ASTM called 1045,080M46, DIN called: C45. 45 steel shaft parts are commonly used materials, it is cheap after quenching and tempering (or normalizing), the cutting can get better, and can obtain higher strength and toughness and other mechanical properties, surface hardness after quenching can up to 45 ~ 52HRC. 40Cr alloy structural steel for medium precision and high speed shaft parts, such steel after quenching and quenching, and has good mechanical properties. GCr15 bearing steel and spring steel 65Mn, after quenching and surface high-frequency hardening, surface hardness of up to 50 ~ 58HRC, and has high fatigue resistance and good wear resistance, can be manufactured with high accuracy axis. Precision machine tool spindle (eg grinding wheel axis, coordinate boring spindle) can be used 38CrMoAIA nitrided steel. This steel is quenched and surface nitriding, not only can get a high surface hardness, but also to maintain a softer core, and therefore impact resistance and toughness. Compared with the case hardening steel, it has a very small heat deformation, higher hardness properties. No. 45 steel is widely used in machinery manufacturing, good mechanical properties of this steel. But this is a medium carbon steel, hardening performance is not good, 45 steel can be hardened to HRC42 ~ 46. So if you need a surface hardness, but also hopes to play 45 # steel superior mechanical properties, often 45 # steel surface carburizing, so you can get the required surface hardness. 45 # seamless steel weight formula: [(OD - Wall Thickness) * Thickness] * 0.02466 = kg / m (weight per meter of 16Mn low-alloy high-strength structural steel: carbon content of 0.1% -0.25% adding the main alloying elements manganese, silicon, vanadium, niobium and titanium;.. it's the total amount of the alloy containing <3% strength divided by 300,350,400 and 450MPa, etc. There are four levels of Q295, Q345, Q390, Q420, Q460. "Q" is the yield of the "Qu" Pinyin word uppercase first, followed by figures for grades minimum yield point (σs) value, followed by the symbol is in accordance with the steel impurity elements (sulfur, phosphorus) With the change to low carbon content and manganese elements is divided into A, B, C, D four, etc. Among them A, B grade steel usually called 16Mn. 16Mn seamless steel tube of one material past Seamless A steel pipe is called, said the current law: Q345B seamless, texture similar to this is Q345C, Q345D, Q345E, quality rating symbols ABCDE respectively are not required impact test impact test temperature of +20 degrees 0 degrees - 20 degrees 40 degrees ABCD represents quality level Q235 quality level is divided into A, B, C, D four levels, from A to D represent different quality from low to high quality level requirements are as follows:. A-- offer S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), according to the buyer needs to provide 1800 cold bend test, but no impact energy provision, carbon content and manganese content is not as terms of delivery. B-- provide S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), cold-formed 180 'trials also provided the + 200C impact energy Ak≥27J C-- except with the Class B requirements, like, but also provide 00C when impact energy Ak≥27J. When D ---- except with the Class B requirements, like, but also provide -200C impact energy Ak≥27J E-- except with the Class B requirements, like, but also provide -400C impact energy Ak≥27J . Credibility is the basis of the strength of cooperation is to ensure the cooperation of the company philosophy: "the same product than the quality of the same quality than price, the same price than service, the same service than the reputation" service commitment: (1) direct selling, excellent quality and reasonable price, reduce intermediate links let line customers. (2) The customer can choose the length of steel or other requirements they need. (3) to provide gas cutting, sawing and other supporting services. (4) various types of steel contract or special specification steel, non-standard cash advantage. (5) adjust the library temporary lack of specification, eliminating the need for you to run around the procurement of hard steel. (6) Transportation, straight hair your location. (7) weekends and holidays, pay short delivery. (8) The sale of steel, the company responsible for the overall quality tracking, you exclude worries.