ASTM A 335 P91 High Pressure Boiler Pipes

We are leading manufacturer and stockist of ASTM A 335 P91 High pressure boiler pipes in China.ASTM A 335 P91 High pressure boiler pipes Heat Treatment Requirements P5,Website:, P9, P11, and P22GradeHeat Treatment TypeNormalizing Temperature Range F [C]Subcritical Annealing or Tempering      Temperature Range F [C]P5 (b,c)Full or Isothermal AnnealNormalize and Temper*****1250 [675]Subcritical Anneal (P5c only)*****1325 – 1375 [715 – 745]P9Full or Isothermal AnnealNormalize and Temper*****1250 [675]P11Full or Isothermal AnnealNormalize and Temper*****1200 [650]P22Full or Isothermal AnnealNormalize and Temper*****1250 [675]P91Normalize and Temper1900-1975 [1040 – 1080]1350-1470 [730 – 800]Quench and Temper1900-1975 [1040 – 1080]1350-1470 [730 – 800]ASTM A 335 P91 High pressure boiler pipes Chemical Requirements GradeP-5P-9P-11P-22P-91P-91 shall also include the following:ElementUNS DesignationK41545S50400K11597K21590K91560Carbon0.15 max0.15 max0.05 – 0.150.05 – 0.150.08 – 0.12V at 0.18 – 0.25Manganese0.30 – 0.600.30 – 0.600.30 – 0.600.30 – 0.600.30 – 0.60N at 0.030 – 0.070Phosphorous, max0.0250.0250.0250.0250.020Ni at 0.40 maxSulfur, max0.0250.0250.0250.0250.010Al at 0.02 maxSilicon0.50 max0.25 – 1.000.50 – 1.000.50 max0.20 -0.50Cb at 0.06 – 0.10Chromium4.00 – 6.008.00 – 10.001.00 – 1.501.90 – 2.608.00 – 9.50Ti at 0.01 maxMolybdenum0.45 -0.650.90 – 1.100.44 – 0.650.87 – 1.130.85 – 1.05Zr at 0.01 maxASTM A 335 P91 High pressure boiler pipes Tensile Requirements SeamlessP-5P-9P-11P-22P-91P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].Tensile Strength, min., psiksi6060606085MPaYield Strength, min., psiksi3030303060MPaASTM A 335 P91 High pressure boiler pipes Permissible Variation in Wall Thickness NPS [DN] DesignatorTolerance, % from SpecifiedOverUnder1/8 to 2 1/2 [6 to 65] incl., all t/D ratios20.0%12.5%Above 2 1/2 [65], t/D <  or = 5%22.5%12.5%Above 2 1/2 [65], t/D > 5%15.0%12.5%(t = Specified Wall Thickness; D = Specified Outside Diameter)ASTM A 335 P91 High pressure boiler pipes Elongation Requirements Calculated Minimum Elongation ValuesElongation in 2 in. or 50 mm, min %Wall ThicknessP5, P9, P11, P22P91in.mmLongitudinalTransverseLongitudinal5/16 (0./32 (0.281)7.22819191/4 (0.250)6.42718187/32 (0.219)5.626173/16 (0.188)4.824165/32 (0.156)422157/8 (0.125)3.221143/32 (0.094)2.420131/18 (0.062)1.61812ASTM A 335 P91 High pressure boiler pipes Permissible Variations in Outside Diameter Outside Diameter at any point shall not vary from standard specified more than:NPS [DN] DesignatorOverUnderin.mmin.mm1/8 to 1 1/2 [6 to 40], incl.1/64 (0.015)0.401/64 (0.015)0.40Over 1 1/2 to 4 [40 to 100], incl.1/32 (0.031)0.791/32 (0.031)0.79Over 4 to 8 [100 to 200], incl.1/16 (0.062)1.591/32 (0.031)0.79Over 8 to 12 [200 to 300], incl.3/32 (0.093)2.381/32 (0.031)0.79Over 12 [300]+/- 1% of the specified outside diameterThe types of ASTM A 213 P91 STEEL PIPES  Cr5Mo  JIS G3458 STPA26  JIS G3462 STBA26  A335 P9  A369 FP9  A199 T9  A213 T9  DIN17175 12CrMo195  DIN17175 1.7362ONE OF THE KIND, MILLIONS OF CHOICES  SUPERIOR QUALITY  PROMPT DELIVERY  FAVORABLE FEEDBACK  ALL AVAILABLE IN PESCO  SELECT PESCO, YOU WILL BE RIGHTFor more info and price of ASTM A 213 P91 STEEL PIPES, please send us inquiry and you will have quick reply soon.

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