16mn seamless change of manganese is divided into A, B, C, D four and so on. Where A, B grade steel usually called 16Mn. 16Mn pipe joints, said the current law: Q345B seamless, q345b precision seamless, texture similar to this is Q345C, Q345D, Q345E, 45 # precision seamless steel pipe, quality grade symbol ABCDE respectively, does not require impact testing Test temperature is +20 degrees 0 degrees -20 degrees 40 degrees Category: ABCD represents quality level by quality level is divided into A, B, C, D four, precision seamless steel tubes, from A to D denote quality from low to high. Different quality level requirements are as follows: A-- offer S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), 1800 can be supplied with cold bend test according to the buyer, but no impact energy provision, carbon content and manganese content is not as terms of delivery. B-- offer S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), cold-formed 180 'test. Also provides + 200C impact energy when Ak≥27J, C-- except with the Class B requirements, like, but also provides impact energy when 00C Ak≥27J. D ---- except with the Class B requirements, like, but also provides impact energy when -200C Ak≥27J E-- except with the Class B requirements, like, but also provide -400C impact energy Ak≥27J. Liaocheng currently owns more than 30 kinds of steel pipe processing enterprises, annual production capacity of over 3 million tons, accounting for about 1/8 of the country, is the largest seamless steel pipe production and sales distribution center. In recent years, Liaocheng attaches great importance to the development of steel industry, formed a production, processing, marketing as one of the steel industry, there has been a virtue steel, Land of seamless steel tubes and a number of Jialong high starting point, large-scale steel manufacturing enterprises . In 2013, the city held the second session of the Fourth Plenary Session of the new municipal government proposed the "East West by melting, small precision seamless across to catch up, construction, Shandong and Henan provinces at the junction of scientific development in the first district" The ambitious goal of the steel industry as one of the key industrial city to improve and develop, especially Dongchangfu committed to the region's steel industry as a billion industry to build, for the steel industry to create a spring-like development environment . A rare opportunity to booming steel industry based, E steel line and actively integrate industry resources, will build a broad platform to "buy the world sell global" steel spot trading will promote the transformation and adjustment of product structure of the steel industry development pattern. The development of e-commerce channel type pipe ultimately platform, as the representative of Jingdong, Taobao platform channels are, in fact, many steel mills, including medium-sized steel traders, they channel platform itself or by means of a third party, better integration of some of the transactions, online payment, logistics and online financing to help companies achieve rapid sales in the short term. Even more is to enhance service integration, E steel line will drive change throughout the steel industry, sales and service means, future business platform has become an inevitable development. Precision seamless tube industry virtues, 27simn precision seamless by virtue Liaocheng Industry Co., Ltd. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future!