ASTM A 335 / A691 GR P12 Alloy Steel Seamless & EFW pipes
Alloy Steel UNS K11562 Pipes, A335 P12 Alloy Steel Seamless Pipe, Alloy Steel ASTM A335 Grade P12 Seamless Pipe Manufacturer, Seamless Ferritic Alloy-Steel P12 Pipe, ASME SA335 Grade P12 Alloy Steel Pipe Supplier in Mumbai, India.
Alloy Steel Pipes & Tubes
Square Pipe
Round Pipe
Rectangular Pipe
Global Supplier of High Quality Alloy Steel P12 Seamless Pipe, ASTM A335 P12 High Pressure Steel Pipe, Alloy Steel P12 Seamless Pipes, P12 Alloy Steel Boiler Steel Pipe Distributor, Alloy Steel Pipe P12, ASTM A691 Alloy Steel EFW Pipe, P12 High Pressure Steel Pipe Exporter in India.
Sizes (Seamless): 1/2” NB - 24” NB
Wall Thickness available:
Schedule 20 - Schedule XXS (heavier on request) up to 250 mm thk.
Material Grades :
Alloy Steel Seamless Pipe :
ASTM A335 GR.P12, ASTM A335 GR.P5, ASTM A335 GR.P9, ASTM A335 GR.P12, ASTM A335 GR.P12, ASTM A335 GR.P22, ASTM A335 GR.P91
Seamless Tube
Alloy Steel Seamless Tube : A213 T1, T5, T9, T11, T12, T22, T91
Other Materials Testing :
NACE MR0175, H2 SERVICE, IBR, etc.
Dimensions :
All Pipe is manufactured and inspected/tested to the relevant standards including ASTM, ASME, API.
ASTM A 335 GR P12 Heat Treatment Requirements
| P5, P9, P11, and P22 | |||
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
| P5 (b,c) | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 - 1375 [715 - 745] | |
| P9 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P11 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| P22 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P91 | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
ASTM A 335 GR P12 Chemical Requirements
| Grade | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 shall also include the following: | ||
| Element | UNS Designation | K41545 | S50400 | K11597 | K21590 | K91560 | ||
| Carbon | 0.15 max | 0.15 max | 0.05 - 0.15 | 0.05 - 0.15 | 0.08 - 0.12 | V at 0.18 - 0.25 | ||
| Manganese | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | N at 0.030 - 0.070 | ||
| Phosphorous, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | Ni at 0.40 max | ||
| Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | Al at 0.02 max | ||
| Silicon | 0.50 max | 0.25 - 1.00 | 0.50 - 1.00 | 0.50 max | 0.20 -0.50 | Cb at 0.06 - 0.10 | ||
| Chromium | 4.00 - 6.00 | 8.00 - 10.00 | 1.00 - 1.50 | 1.90 - 2.60 | 8.00 - 9.50 | Ti at 0.01 max | ||
| Molybdenum | 0.45 -0.65 | 0.90 - 1.10 | 0.44 - 0.65 | 0.87 - 1.13 | 0.85 - 1.05 | Zr at 0.01 max | ||
ASTM A 335 GR P12 Tensile Requirements
| Seamless | ||||||
| P-5 | P-9 | P-11 | P-22 | P-91 | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. | |
| Tensile Strength, min., psi | ||||||
| ksi | 60 | 60 | 60 | 60 | 85 | |
| MPa | 415 | 415 | 415 | 415 | 585 | |
| Yield Strength, min., psi | ||||||
| ksi | 30 | 30 | 30 | 30 | 60 | |
| MPa | 205 | 205 | 205 | 205 | 415 | |
ASTM A 335 GR P12 Permissible Variation in Wall Thickness
| NPS [DN] Designator | Tolerance, % from Specified | |
| Over | Under | |
| 1/8 to 2 1/2 [6 to 65] incl., all t/D ratios | 20.0% | 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) | ||
