ASME SA335 ASTM A 335 P11 Seamless Pipes Alloy Steel Pipe
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ASTM A335 Gr. P11 seamless pipes, with nominal chemical composition of “1.25Cr-0.5Mo” or “1.25Cr-0.5Mo-Si”, can be used for ASME B31.3 process piping. The ASME B31.3 Code has designated ASTM A335 Gr. P11 as a listed material and provided the basic allowable stresses in tension at various temperatures.
ASTM A335 P11 Seamless Ferritic Alloy-Steel
PipeManufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 2.1mm——50.8 mm.
Outer diameter (OD): 21.3 mm——610mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Materials and Manufucture
Grade P11 Pipe may be either hot finished or cold drawn with the finishing treatment.
Heat Treatment:
P11 Seamless Ferritic Alloy-Steel Pipe are reheated and furnished in the full-annealed, isothermal annealed, or normal-ized and tempered condition. If furnished in the normalized and tempered condition,the minimum tempering temperature for Grades P11are 1200°F [650°C].
Chemical Composition of ASTM A335 P11
| Grade | Chemical Composition(%) | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P11 | 0.05-0.015 | 0.30-0.60 | ≤0.025 | ≤0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
Mechanical Properties of ASTM A335 P11
| Grade | Mechanical property | ||
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(%) | |
| P11 | ≥415 | ≥205 | ≥30 |
Hydrostatic Test
Each length of pipe shall be subjected to the hydrostatic test or nondestructive examination.
Mechanical Tests Required
Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test—For material heat treated in a batch-type furnace, tests shall be made on 5 % of the pipe from each treated lot.
For small lots, at least 1 pipe shall be tested. For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5 % of the lot, but in no case less than 2 pipe.
Marking
In addition to the marking prescribed in Specification A 999/A 999M, the marking shall include the length, the ANSI schedule number and the heat number or manufacturer’s number by which the heat can be identified.
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MTC EN 10204 3.1 ,inspection and PMI pictures can be provided before shipment.
