ASTM A335 alloy steel pipe

Astm A335 standard specication for seamless ferritic alloy-steel pipe for high-temperature service

ASTM A335 standard is issued under the fixed designation A 335/A 335M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

OUR MAIN ASTM A335 alloy steel pipe

ASTM A335 P92 High pressure boiler pipes
ASTM A335 P92 is the part of ASTM A335, The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.
ASTM A335 P91 High pressure boiler pipes
The steel material shall conform to chemical composition, tensile property, and hardness requirements.

ASTM A335 P9 alloy steel pipe
ASTM A335 P9 Alloy steel pipe apply to petroleum, chemical industry, electric power, boiler, high temperature resistant
ASTM A335 P5 High pressure boiler pipes
The range of ASTM A335 P5 pipe sizes that may be examined by each method shall be subjected to the limitations

ASTM A335 P22 alloy steel pipe
A335 is often called chrome moly pipe because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr).

ASTM A335 P11 alloy steel pipe
ASTM A335 P11 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.

Chemical Composition:
Grade  C  Mn  P  S  Si  Mo
 P1  0.10-0.20  0.30-0.80  0.025  0.025  0.10-0.50  0.44-0.65
 P2  0.10-0.20  0.30-0.61  0.025  0.025  0.10-0.30  0.44-0.65
 P5  0.15max  0.30-0.60  0.025  0.025  0.50max  0.45-0.65
 P5b  0.15max  0.30-0.60  0.025  0.025  1.00-2.00  0.45-0.65
 P5c  0.12max  0.30-0.60  0.025  0.025  0.50max  0.45-0.65
 P9  0.15max  0.30-0.60  0.025  0.025  0.25-1.00  0.90-1.10
 P11  0.05-0.15  0.30-0.60  0.025  0.025  0.50-1.00  0.44-0.65
 P12  0.05-0.15  0.30-0.61  0.025  0.025  0.50max  0.44-0.65
 P15  0.05-0.15  0.30-0.60  0.025  0.025  1.15-1.65  0.44-0.65
 P21  0.05-0.15  0.30-0.60  0.025  0.025  0.50max  0.80-1.06
 P22  0.05-0.15  0.30-0.60  0.025  0.025  0.50max  0.87-1.13
 P23  0.04-0.10  0.10-0.60  0.030max  0.010max  0.50max  0.05-1.30

 

Mechanical Properties
Mechanical properties  P1,P2  P12  P23  P91  P92,P11  P122
 Tensile strength  380  415  510  585  620  620
 Yield strength  205  220  400  415  440  400
Heat Treatment
A / N+T
N+T / Q+T
N+T
Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

Heat Treatment Requirements
Grade Heat Treatment Type
P5, P9, P11, and P22
Normalizing Temperature Range F [C] Subcritical Annealing or Tempering
Temperature Range F [C]
A335 P5 (b,c) Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
Subcritical Anneal (P5c only) ***** 1325 – 1375 [715 – 745]
A335 P9 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
A335 P11 Full or Isothermal Anneal
Normalize and Temper ***** 1200 [650]
A335 P22 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
A335 P91 Normalize and Temper 1900-1975 [1040 – 1080] 1350-1470 [730 – 800]
Quench and Temper 1900-1975 [1040 – 1080] 1350-1470 [730 – 800]
Mechanical Tests Specified

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 one 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.

Notes for Hardness Test:
P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].

Notes for Bend Test:
For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.

Hydrostatic Test

The inside diameter of the bend shall be 1 inch [25 mm].
Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used.

Ordering Information

Orders for material under this specification should include the following, as required, to describe the desired material adequately:

Quantity Feet, meters, or number of lengths
Name of material Seamless Alloy Steel Pipe
Grade P5, P9, P11, P22, P91
Manufacture Hot-finished or cold-drawn
Size using one of the following:
NPS and Schedule Number
Outside Diameter and Nominal Wall Thickness
Outside Diameter and Minimum Wall Thickness
Inside Diameter and Nominal Wall Thickness
Inside Diameter and Minimum Wall Thickness
Length Specific or Random
End Finish
Referenced Documents

  • A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
  • E213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
  • E309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
  • E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
  • E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
  • E570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
  • B36.10M Welded and Seamless Wrought Steel Pipe
  • SAE J 1086 Practice for Numbering Metals and Alloys (UNS)
  • SNT-TC-1A Recommended Practice for Nondestructive Personnel Qualification and Certification
  • ASTM A213 T11 Seamless alloy pipe
    ASTM A213 T11 Standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes.