C&N HUITONG limited are leading steel pipe,fitting and flange Supplier since 1997.
Phone: +86-0317-6287569     E-mail: alloypipefitting@gmail.com

Steel pipe/Alloy steel pipe/

ASTM A335 P12 Alloy Steel Pipe

Dimension:1/2in to 48in

Material:ASTM A335/ASME SA 335 P5, P9, P11, P22, P91

Standard:ASTM A213 ASTM A335 DIN 17175 En 10216-2

Inspection:MT, PT,UT,VT etc

Feature:Stock regular sizes, Bevel weld end CNC machining acc B16.25 ,

                                Pressure test postive,OEM service, Customized bending available.  

  • Product Details
  • FAQs
  • Packing & Delivery

A335 Chrome Moly Seamless Pipes & Tubes | ASTM A335 | GR P5 | P9 | P11 | P12 | P22 | P91
Prosaic Steel and Alloys India Manufacturer and fabricator, Importer, Stockholder, Exporter of A335 Grade P5 | P9 | P11 | P12 | P22 | P91 | P91 Chrome Moly Pipe premier suppliers of bulk A335 Grade P5 | P9 | P11 | P12 | P22 | P91 | P91 Chrome Moly Pipe stock worldwide. Fast delivery guaranteed for every size stainless steel A335 Chrome Moly Pipes; Alloy Steel Seamless Pipe, largest range of AASTM A335 Pipe suppliers in Indi

Specification :

Prosaic Steel Supply stocks a full range of the following A335 pipe grades:

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. The most common use of grades P11, P22, and P91 is in the power industry and petro-chemical plants, Grades P5 and P9 are commonly used in refineries

Alloy Steel Pipes (ASTM A335 P12)
ASTM A335 P12 Pipe offered by us are made as per IBR standards and are used mainly for boiler operations. We source these seamless pipes in varied size range. Further, we can also get these customized as per boiler piping requirements. For ensuring in them optimum quality standards, we source these from quality manufacturers. We also offer clients of having their own mark on them. >ASTM A335 P12 Alloy Steel seamless Pipe Chemical Composition

Chemical composition % of >ASTM A335 P12 Pipe

C, %Mn, %P, %S, %Si, %Cr, %Mo, %
0.015 max0.30-0.610.025 max0.025 max0.50 max0.80-1.250.44-0.65

Mechanical Properties of ASTM A335 P12 Pipe

Tensile Strength, MPaYield Strength, MPaElongation, %
415 min205 min30 min

Heat Treatment Requirements of ASTM A335 P12 Pipes

P5, P9, P11 and P22
GradeHeat Treatment TypeNormalizing 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]
P9Full or Isothermal Anneal
Normalize and Temper*****1250 [675]
P11Full or Isothermal Anneal
Normalize and Temper*****1200 [650]
P22Full or Isothermal Anneal
Normalize and Temper*****1250 [675]
P91Normalize and Temper1900-1975 [1040 – 1080]1350-1470 [730 – 800]
Quench and Temper1900-1975 [1040 – 1080]1350-1470 [730 – 800]

Permissible Variation in Wall Thickness of ASTM A335 P12 Pipes

NPS [DN] DesignatorTolerance, % from Specified
OverUnder
1/8 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)  

Elongation Requirements of ASTM A335 P12 Pipes

Calculated Minimum Elongation Values
Elongation in 2 in. or 50 mm, min %
Wall ThicknessP5, P9, P11, P22P91
in.mmLongitudinalTransverseLongitudinal
5/16 (0.312)8302020
9/32 (0.281)7.2281919
1/4 (0.250)6.4271818
7/32 (0.219)5.62617
3/16 (0.188)4.82416
5/32 (0.156)42215
7/8 (0.125)3.22114
3/32 (0.094)2.42013
1/18 (0.062)1.61812

Permissible Variations in Outside Diameter of ASTM A335 P12 Pipes
Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN] DesignatorOverUnder
 in.mmin.mm
1/8 to 1 1/2 [6 to 40], incl.1/64 (0.015)0.401/64 (0.015)0.40
Over 1 1/2 to 4 [40 to 100], incl.1/32 (0.031)0.791/32 (0.031)0.79
Over 4 to 8 [100 to 200], incl.1/16 (0.062)1.591/32 (0.031)0.79
Over 8 to 12 [200 to 300], incl.3/32 (0.093)2.381/32 (0.031)0.79
Over 12 [300]+/- 1% of the specified outside diameter

Mechanical Tests Specified for ASTM A335 P12 Pipes

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

A335 Gade P12 Pipes Required Markings on Each Length
(On Tags attached to each Bundle in case of Bundled Pipe) Markings will adhere to prescribed specifications in A 999/A999M and be: Rolled, Stamped, or Stenciled (Mfrs. Option)

In addition, markings will include:
Length of PipeMarking to indicate the test method(s)HydrostaticNondestructiveMarkingYESNOTest PressureNOYESNDENONONHYESYESTest Pressure/NDE
Schedule Number
Heat Number or Manufacturer’s number by which heat can be identified
An Additional Symbol “S” if the pipe conforms to any Supplementary Requirements
S1 – Product Analysis
S2 – Transverse Tension Test
S3 – Flattening Test
S4 – Metal Structure and Etching Tests
S5 – Photomicrographs
S6 – Photomicrographs for Individual Pieces
S7 – Alternative Heat Treatment – Grade P91
Pipe that has been weld repaired shall be marked “WR”.

ASTM A335 P12 Alloy Steel Seamless Pipes Reference Documents

  • ASTM A999/A 999M Specification for General requirements for Alloy and Stainless Steel Pipe.
  • ASTM E 213 Practice for Ultrasonic Examination of metal Pipe and Tubing
  • ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
  • ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
  • ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
  • ASME B26.10M Welded and Seamless Wrought Steel Pipe

ASTM A335 P12 Alloy Steel Seamless Pipes Ordering Information

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

QuantityFeet, meters, or number of lengths
Name of materialSeamless Alloy Steel Pipe
GradeP5, P9, P11, P22, P91
ManufacturerHot-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
LengthSpecific or Random
End Finish

ASTM A335 P12 Seamless Pipe Packing
A335 P12 Pipe is sleeved into plastic bag individually, pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.

A335 Grade P12 Alloy Steel Seamless Pipe packing will be according to international standard in bundles strapped by strips then into containers to avoid any damage.

Delivery: Within 10-25 days or asap if we have enough stock

Types of Packaging:

  • – Bundles (hexagonal)
  • – Wooden Boxes
  • – Crates (steel/wooden)
  • – Special crates for U-Bend tubes with each radius separated
  • – Packaging for A335 Grade P12 Pipe as per customer’s requirements

Special Features:

  • – Each bundle covered with plastic for protection against extreme weather.
  • – End of A335 Grade P5, P9, P11, P22, P91 Alloy Steel Seamless Pipe protected by plastic caps.
  • – Bundles strapped with plastic strips.
  • – Each radius of U-Bend tube separated by a separator.
  • – Packaging list (laminated) placed with box/crate.



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.

stock-alloy-pipe
stock-alloy-pipe-p12

HONGCHENG LIMITED CHINA have exported Alloy Steel Pipe , ASTM A333 p11 pipes to over 60 countries including Sudan,UAE, UK, Iran, Iraq, Qatar, Bahrain, Oman, Yemen, Lebanon, Jordan, Saudi Arabia, Malaysia, Indonesia, Singapore, Australia, New Zealand, USA, Canada, Mexico, Brazi, Netherlands, Germany, Italy, Spain, Serbia, Kuwait, Peru, Nigeria, Poland, South Africa, Denmark, Turkey, Egypt, Venezuela, Kuwait, Madagascar, Angloa & Srilanka. we stock reputation factory material from chengde, baosteel, vallourec tianda, kanghong, hengyang valin ,JFE etc,the stock list update weekly.

Frequently Asked Questions

Easy to enjoy our service by scan the follow Frequently Asked Questions

Q: What kind of material does HONGCHENG supply?

HONGCHENG generally specializes in alloy steel and specialty alloys. Some of these specialty alloys include Alloy 20, Duplex Alloys, Nickel Alloys such as various grades of Hastelloy (C276, C22), Aluminum, Chrome Moly ASTM A/ASME SA 335 P1, P2, P5, P9, P11, P12,P22, P23, P91, and P92.
we also offer bending,CNC machining, coating service.

Q. What the define of pipe fittings?
Pipe fitting is the occupation of installing or repairing piping or tubing systems that convey liquid, gas, and occasionally solid materials. This work involves selecting and preparing pipe or tubing, joining it together by various means, and the location and repair of leaks.
Pipe fitting work is done in many different trades: Plumbing, HVAC, manufacturing, fire prevention, and many others. Pipe fitters (sometimes called simply “fitters”) are represented in the USA by the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada.
Fitters work with a variety of pipe and tubing materials including several types of plastic, copper, steel, iron, aluminium, clay, and lead.

Q. What should I consider for buying pipe fittings?
A. Material, Size, Temperature and Pressure Ratings, Durability, Standards,surface coating etc.

Q. What are threaded fittings?
A. Thread fitting is the fitting with thread concetions,the regular screw standards are NPT and BSP.NPT is a U.S. standard for tapered threads used to join pipes and fitting and BSP is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread.

Q. The define of flange?
A. A flange is usually in the shape of a plate or ring which forms a rim at the end of a pipe when fastened to the pipe.

Q.Do you provide Material Test Reports (MTR’s) ?
Relevant documents according to inspection test plan will be provide along with goods.

Q.What is a standard used in pipe fittings?
A. Standards are certain authentication given in reference to manufacture and installation of the product . Some common standards are BSP, NPT, ANSI, ASME etc

Q. My questions is not answered in this FAQs section, what do I do now?
A: Simply call us or email us at info@alloysteelfitting.com and we will do our best to effectively answer all of your product or order questions. .

All our pipe fitting and flange shipped with proper packing protection, and our factory with good experience on special products like polished pipe packing ,FBE coated fitting and pipe packing, oversizes fitting up to 3500mm packing&shipping.

Common shipping and packing for our products

Item Producs   Dimension Surface Packing
method
Shipping
method
Remark
1 Flange below 60in varnish oil wooden case sea/air  
2 Flange over 60in varnish oil wooden pallet/steel frame sea/air For OD over 2.3m
3 Fitting below 24in varnish oil wooden case/pallet sea/air  
4 Fitting over 24in black painting wooden case/pallet sea/air  
5 Fitting over 24in black painting Nude packing Bulk vessel For OD over 2.32m
6 Pipe Below 8in bundle Woven bag/wooden case sea/air  
7 Pipe over 8in single piece Woven bag/wooden case sea/air  
8 Gasket all sizes   Cartons/wooden case sea/air  
9 Fastener all sizes   Cartons/wooden case sea/air  

Also we can fulfill customized packing and delivery requirements. some of our products packing pictures as below

Flange packing Flange packing Steel pipe wooden case packing

Pipe fitting pallet packing Forge fitting packing FBE pipe fitting packing
SPW gasket packing Steel pipe bulk cargo packing Steel frame packing
Steel pipe protection Customize products packing Customize products packing

Prev:

Next:

Leave a message