Changzhou Hongtai Precision Steel Pipes Co. focus on boiler steel pipes, according to customers  requirements, we supply steel pipes with annealed, normalized, normalized and tempered condition, welcome to contact us.Product NameSTBA 12 steel pipeSTBA 13 steel pipeSTBA 22steel pipechemical analysisC:0.10-0.20; Si:0.10-0.50;Mn:0.30-0.60;P:  0.035; S: 0.035;Mo:0.45-0.65C:0.15-0.25; Si:0.10-0.50;Mn:0.30-0.80;P:  0.035; S: 0.035;Mo:0.45-0.65C:  0.15;Si 0.50;Mn:0.30-0.60;P: 0.035;S 0.035; Cr:0.80-1.25;Mo:0.45-0.65Tensile Strength380Mpa410Mpa410MpaYield strength205Mpa205Mpa205MpaStandardJIS3462LengthAs customer s requestPackagingStandard export packing, packed in woven bags, with two nylon slings, or can be customized as requestHeat Treatment/      Delivery ConditionCold 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 boiler and heat exchanger.Main MarketAsia, Middle East, Europe, etc.