Changzhou Hongtai Precision Steel Pipes Co. specializes in steel pipes manufacturing and trading for many years, enjoys a great reputation in China. Our products are famous for their high quality and wide size range.Product NameE215 steel pipeE235 steel pipeE355  steel pipechemical analysisC: 0.10;Si: 0.05;Mn: 0.70;P: 0.025; S: 0.025;Al: 0.025C: 0.17;Si: 0.35;Mn: 1.20;P: 0.025; S: 0.025C: 0.22;Si: 0.55;Mn: 1.60;P: 0.025; S: 0.025Tensile Strength+C, 430MPa; +LC, 380MPa;+SR, 380MPa;+A, 280MPa;+N,290-430MPa+C, 480MPa; +LC, 420MPa;+SR, 420MPa;+A, 315MPa;+N, 340-480MPa+C, 640MPa; +LC, 580MPa;+SR, 580MPa;+A, 450MPa;+N,490-630MPaYield strength+SR, 280MPa; +N, 215MPa+SR, 350MPa;+N, 235MPa+SR, 450MPa; +N, 355MPaStandardEN10305-1LengthAs customer s requestPackagingStandard export packing, packed in woven bags, with two nylon slings, or can be customized as requestHeat Treatment/      Delivery ConditionCold finished (hard)   BK(+C)Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformationCold finished (soft)    BKW(+LC)The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)Cold finished and stress-relieved annealing BKS(+SR)Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.Annealed    GBK(+A)The last Cold forming process is followed by annealing in a controlled atmosphere.Normalized   NBK(+N)The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.Delivery TimeWithin 35-50 days from receiving depositPayment Term100% L/C at sight or 30% deposit, 70% balance against copy of B/LUsage/ApplicationPipes for automobile and motorcycleMain MarketAsia, Middle East, Europe, etc.