Changzhou Hongtai Precision Steel Pipes Co. is a professional steel pipe trading company; we have rich experience in exporting pipes and can always provide the solutions for our customers, it is our honor to serve you.Product Name20G steel pipe20MnG steel pipe25MnG steel pipe12Cr1MoVG steel pipe15CrMoG steel pipechemical analysisC:0.17-0.23;Si:0.17-0.37;Mn:0.35-0.65;P: 0.025; S: 0.015C:0.17-0.23;Si:0.17-0.37;Mn:0.70-1.00;P: 0.025; S: 0.015;C:0.22-0.27;Si: 0.17-0.37;Mn: 0.17-1.00;P: 0.025; S: 0.015C:0.08-0.15;Si: 0.17-0.37;Mn: 0.40-0.70;P: 0.025; S: 0.010;Cr:0.90-1.20;Mo:0.25-0.35;V:0.15-0.30C:0.12-0.18;Si: 0.17-0.37;Mn: 0.40-0.70;P: 0.025; S: 0.015; Cr:0.80-1.10;Mo:0.40-0.55Tensile Strength410-550MPa415-560MPa485-640MPa470-640MPa440-640MPaYield strength245240275255295StandardGB5310LengthAs 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 high pressure boilerMain MarketAsia, Middle East, Europe, etc.