Dry Pipe Co., Ltd. Liaocheng million (www.sd304.com) is located in Liaocheng City Development Zone, Shandong Liaocheng Shandong Province Wang Zhuang Industrial Park, Contact: Deng Qinghua Precision Steel national standards; GB / T699-2008, precision steel country standards; GB / T3639-2008, another may still apply GB / T8162-2008 precision steel structure. European standard for precision steel: DIN2391 precision steel plant - Seamless Steel Tube Plant - my company - Shandong Liaocheng dry one hundred million industry (silver Sheng supplies) professional production and sales: Precision tubes, precision steel tubes, precision bright tubes, precision seamless steel tubes, no pipe joints and other pipe 20cr precision tubes, material specifications complete production 20cr precision tubes, for your peace of mind to choose from. Standard tensile strength precision steel precision steel standard knowledge table GB / T3639 ------ China National Standard GB / T8713 ------ Chinese national standard precision steel use for mechanical structure, hydraulic structures, hydraulic and pneumatic manufactured cylinder major producer of precision steel grades 10,20,35,45 and other chemical composition, mechanical properties - the chemical composition of the reference corresponding national standards or international standards for grades delivery status cold / hard (Y) cold / Soft (R ) stress relief annealing (T) Tensile Strength (MPa) Elongation (%) Tensile Strength (MPa) Elongation (%) Tensile Strength (MPa) Elongation (%) ≥10412637310333122051054518432103558845496520845647462856087. Dry one hundred million existing industry 2 2 roll system precision rolling mill and a 3-roll rolling mill system specialized in manufacturing high-precision fine fine bar, precision seamless bright Wuxi 20cr precision tubes, dry one hundred million industry to produce precision steel pipe, precision seamless, precision light tubes, cold drawn precision tubes, honing seamless steel inner tube and turning deep hole boring and honing. This machine produced products of high precision, small tolerances, good finish, and can replace the use of honing tubes. Dry one hundred million can be used for engineering precision steel industry, metallurgy, shipbuilding, construction and transportation machinery, hydraulic cylinder, cylinder cylinder, oil pumping, submersible pump tube, textile, glass fishing machine plastic machinery and automotive drive shafts and other large-tonnage industry, precision rollers.