ASTM A335 Pipe (ASME S/A335, Chorme-Moly) is a seamless ferritic Alloy-Steel Pipe for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Sometimes referred to as “P Grade”, chome moly pipe is popular in P-Grades P5, P9, P11, P22, and P91.

Recommended alloy pipes/tubes as below:

banner_astm-a213-t9+ A213 tubes banner_astm-a333+ A333 pipes banner_tubing+ A519 pipes

ASTM A335 P92 High pressure boiler pipes

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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.


Seamless pipes ASTM A335 grades P5, P9, P11, P22, P91

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We are one of the leading Manufacturers, Supplier and Exporters of ASTM A335 Alloy Steel Seamless Pipes that is using high quality raw materials. All products are industry-standard conforming to or exceeding API, ASTM, ASME, ANSI and other national and international standards. These pipes are available in different size, specification, grades & thikness as per the clients requirements.


ASTM A335 P91 high pressure semaless boiler pipe stock

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ASTM A335 P91 high pressure semaless boiler pipe, The range of ASTM A335 P91 seamless alloy steel pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.


ASTM A335 P91 High pressure boiler pipes

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ASTM A335 P91 is the part of ASTM A335, The pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.


ASTM A335 P22 pipes stock

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The range of ASTM A335 P22 pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.


ASTM A335 P22 steel pipe

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ASTM A335 P22 steel pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.


ASTM A335 P22 elbow

banner_astm-a333-p22-elbowWe supply a full range of ASTM A335 P22 elbow schedules ranging from Sch 5 thru Double Extra Heavy, we deliver ASTM A335 P22 elbow with Exceptional sizes & Quality.


ASTM A335 P22 bend

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We supply a full range of ASTM A335 P22 bend schedules ranging from Sch 5 thru Double Extra Heavy, we deliver ASTM A335 P22 bend with Exceptional sizes & Quality.


ASTM A335 P22 alloy pipe

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You can also Order small quantities, we will be happy to quote best price for small and large quantities & can typically deliver the ASTM A335 P22 alloy pipe in minimum time frame anywhere around the globe.


ASTM A335 Grade P22 Alloy pipes

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ASTM A335 Grade P22 pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.


ASTM A335 P22 alloy steel pipe

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ASTM A335 P22 is the part of ASTM A335. ASTM A335 P22 alloy steel pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.


ASTM A335 P11 alloy steel pipe

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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.


ASTM A335 P9 seamless alloy steel pipe

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ASTM A335 P5 High pressure boiler pipes

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Grades P-11, P-22 – P-91 & P-92 are prevalent grades for the power industry, while P-5 & P-9 are the grades utilized in major refinery processing.

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Download A335 Specification

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


What is AISI steel?
what-is-aisi-steel

SAE International, as a standards organization, maintains several alloy numbering systems, one of which, for steel grades, is the SAE steel grades system. In the 1930s and 1940s the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.


Seamless steel tubes for low-temperature service

banner_astm-a333Low temperature service seamless pipes are application for low-temperature pressure container piping by the main standard GB/T18984-2003, ASTM/ASME A/SA333 with steel grade 16MnDG, 10MnDG, A333 Gr.1, A333 Gr.6, A333Gr.3.

ASTM Standard of Steel pipes

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ASTM Standards can be purchased as a digital library subscription or indivi


What is the meaning of ASTM standard?

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ASTM International, known until 2001 as the American Society for Testing and Materials (ASTM), is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.


Welded Pipe vs. Seamless Pipe

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Welded vs. seamless. It’s a debate that’s been around for a long time, and it’s still going strong today.


Carbon Steel Seamless Pipes

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Exporter and supplier of Carbon Steel Seamless Pipes, Carbon Steel Seamless tubes, carbon steel tubes, Black and Hot-dipped Zinc-coated Steel Pipes Seamless, Seamless Carbon Steel for High Temperature Service


Chrome Moly Alloy A213, SA213 Heater Tubes

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Sunny Steel is a premier worldwide supplier for all your Chrome Moly Alloy A213 / SA213 Heater Tubes needs.


Heavy Wall Seamless Carbon Pipe

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Seamless (SMLS) pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell.


ASTM A335 Seamless Ferritic Alloy Steel Pipe for High-Temperature Service for High-Temperature Service

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

The Three Benefits of Seamless Steel Commercial Pipe

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The seamless steel pipe manufacturing process starts with a solid, round steel billet. This billet is then heated to great temperatures and stretched and pulled over a form until it takes the shape of a hollow tube.


ASTM Seamless pipes

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ASTM Standards can be purchased as a digital library subscription or individually from ASTM and other qualified standards providers.


Alloy Steel Seamless Pipes

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We are specialized in offering precision engineered alloy steels, which are used in various engineering applications and can be availed in various grades like.

How to calculate a steel pipe theoretic weight

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How to packing the seamless pipe

utube-packedThere are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

Related informations :

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Pipe Beveling

A335 is often called chrome moly pipe because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability. Moly increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is the most effective single additive that increases high temperature creep strength.

It also enhances the corrosion resistance of steel, and inhibits pitting. Chromium (or chrome) is the essential constituent of stainless steel. Any steel with 12% or more Chrome is considered stainless. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures. The composition chrome moly alloy steel pipe make it ideal for use in power plants, refineries, petro chemical plants, and oil field services where fluids and gases are transported at extremely high temperatures and pressures.

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
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