ASTM A213 is a standard of American Society of Testing Materials, it is for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.Product NameT11 steel pipeT12 steel pipeT91 steel pipeT92 steel pipechemical analysisC:0.05-0.15;Si: 0.50-1.00;Mn:0.30-0.60;P: 0.025; S: 0.025;Cr:1.00-1.50;Mo:0.44-0.65C:0.05-0.15;Si: 0.50;Mn:0.30-0.61;P: 0.025; S: 0.025;Cr:0.80-1.25;Mo:0.44-0.65C:0.08-0.12;Si:0.20-0.50;Mn:0.30-0.60;P: 0.02; S: 0.01;Cr: 8.00-9.50;Mo:0.85-1.05C:0.07-0.13;Si: 0.50;Mn:0.30-0.60;P: 0.020; S: 0.010;Cr:8.50-9.50;Mo:0.30-0.60Tensile Strength-415585620Yield strength-220415440StandardASTM A213LengthAs 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 superheaterMain MarketAsia, Middle East, Europe, etc.