ASTM A335 P92 Chrome Moly Seamless Pipe (9Cr-2W-Mo-V-Nb)
ASME SA335 Grade P92 CSEF alloy steel pipe for ultra-supercritical steam service
Savoy Piping Inc. supplies ASTM A335 P92 / ASME SA335 Grade P92 seamless pipe — the tungsten-bearing 9Cr CSEF grade (UNS K92460) developed for demanding ultra-supercritical steam temperatures and pressures.
If your design office has already stretched P91 on creep margins or wall thickness, P92 is usually the next conversation. Compared with P91, P92 lowers molybdenum and adds tungsten (with controlled boron and microalloying) to improve creep rupture strength, which can allow higher design temperatures or thinner walls when the code and project specs support it.
Supply discipline matters more here than marketing adjectives. Chemistry windows are tight, heat treatment must be correct, and welding/PWHT procedures are specialist CSEF work. We quote P92 with full mill documentation (EN 10204 3.1 / 3.2), hardness and NDE as ordered, and optional third-party inspection.
Related pages: ASTM A335 P91, P22, P11, and the full A335 chrome moly hub.
Also see: Alloy steel seamless hub · Chrome moly hub · Alloy buttweld.
ASTM A335 P92 Alloy Steel Seamless Pipe Range
| A335 P92 Alloy Steel Seamless Pipes Specification | ASTM A335 / ASME SA335 |
| A335 P92 Alloy Steel Seamless Pipes Grades | ASTM A335 P5, ASTM A335 P9, ASTM A335 P11, ASTM A335 P22, ASTM A335 P91, ASTM A335 P92, ASME SA335 P5, ASME SA335 P9, ASME SA335 P11, ASME SA335 P22, ASME SA335 P91, ASME SA335 P92. |
| A335 P92 Alloy Steel Seamless Pipes Type | Seamless - Hot Rolled / Cold Drawn |
| A335 P92 Alloy Steel Seamless Pipes Outer Diameter Size | A335 - 3/8" NB to 30" NB (Nominal Bore Size) |
| A335 P92 Alloy Steel Seamless Pipes Wall Thickness | Schedule 20 to Schedule XXS (Heavier On Request) Up to 250 mm Thickness |
| A335 P92 Alloy Steel Seamless Pipes Length | 5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| A335 P92 Alloy Steel Seamless Pipes Ends | Plain Ends / Beveled Ends / Coupling |
| A335 P92 Alloy Steel Seamless Pipes Delivery Conditions | As Rolled, Cold Drawn, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T |
| A335 P92 Alloy Steel Seamless Pipes Coating | Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
| A335 P92 Alloy Steel Seamless Pipes Other Testing | Tensile Test, Transverse Tension Tests, Flattening Test, Metal Structure and Etching Tests, Photomicrographs, Hardness Tests, etc. |
| A335 P92 Alloy Steel Seamless Pipes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API. |
| A335 P92 Alloy Steel Seamless Pipes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment |
| A335 P92 Alloy Steel Seamless Pipes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| A335 P92 Alloy Steel Seamless Pipes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| A335 P92 Alloy Steel Seamless Pipes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
What is ASTM A335 P92 pipe?
ASTM A335 / ASME SA335 Grade P92 is seamless ferritic alloy-steel pipe for high-temperature service. It is a creep-strength-enhanced ferritic steel based on roughly 9% chromium, with tungsten additions, reduced molybdenum versus P91, and microalloying (V, Nb, B, N) controlled to specification.
P92 was developed to push steam-cycle efficiency — better creep strength at elevated temperature than conventional Cr-Mo grades and, in many design cases, an advance on P91 for USC service. Like other A335 grades, the pipe must be suitable for forming and fusion welding, but fabrication must follow qualified CSEF procedures.
European designation often referenced alongside P92 is X10CrWMoVNb9-2 (EN). Always order to the governing purchase specification (ASTM A335 / ASME SA335) and confirm heat-treatment and testing clauses on the PO.
Typical applications of ASTM A335 P92 pipe
- Ultra-supercritical main steam and hot reheat piping
- High-efficiency boiler outlet headers designed around CSEF 9Cr-W material
- Advanced thermal power projects seeking higher allowable stress or reduced wall thickness versus P91
- Critical high-temperature steam manifolds under ASME B31.1 / project specs
- Matched CSEF packages with P92 / F92 / WP92 component families where specified
P92 vs P91 — quick buyer guidance
Choose P92 when the design needs the extra creep capability of tungsten-bearing 9Cr CSEF steel for USC or similarly demanding steam duty. Stay with P91 when the approved piping class, welding procedures, and inventory strategy are already built around modified 9Cr-1Mo and P92 is not required by design. Neither grade replaces conventional P22 without a full engineering review.
ASTM A335 P92 Alloy Steel Seamless Pipes chemical compositions
Heat-analysis composition limits for seamless pipe ordered as Grade P92 shall conform to ASTM A335 / ASME SA-335, Table 1 (UNS K92460). Values below are mass percent; the word max denotes a maximum unless a range is given.
| Element | Composition, % |
|---|---|
| Carbon | 0.07–0.13 |
| Manganese | 0.30–0.60 |
| Phosphorus, max | 0.020 |
| Sulfur, max | 0.010 |
| Silicon, max | 0.50 |
| Chromium | 8.50–9.50 |
| Molybdenum | 0.30–0.60 |
| Vanadium | 0.15–0.25 |
| Nitrogen | 0.03–0.07 |
| Nickel, max | 0.40 |
| Aluminum, max | 0.02 |
| Columbium (Niobium) | 0.04–0.09 |
| Tungsten | 1.50–2.00 |
| Boron | 0.001–0.006 |
| Titanium, max | 0.01 |
| Zirconium, max | 0.01 |
ASTM A335 P92 Alloy Steel Seamless Pipes tensile test
Room-temperature tensile requirements for Grade P92 seamless pipe shall conform to ASTM A335 / ASME SA-335, Table 3 (longitudinal orientation).
| Seamless, Grade P92 (UNS K92460) | ||
| P-92 | Grades P91, P92, P122, and P911 shall have a hardness not exceeding 250 HB / 265 HV [25 HRC] (see ASTM A335 / SA-335). | |
| Tensile Strength, min., psi | ||
| ksi | 90 | |
| MPa | 620 | |
| Yield Strength, min., psi | ||
| ksi | 64 | |
| MPa | 440 |
ASTM A335 P92 pipes other mechanical test
| 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: | Grades P91, P92, P122, and P911 shall have a hardness not exceeding 250 HB / 265 HV [25 HRC]. |
| 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 test | Each length of pipe shall be Hydro tested, at option of manufacture, nondestructive electric testing can be used. |
ASTM A335 P92 Seamless Pipes heat treatment
Final heat treatment for Grade P92 shall conform to ASTM A335 / ASME SA-335, Table 2 (summary below; use the standard edition ordered for exact wording and options).
| Grade | Heat treatment type | Normalizing (or austenitizing) temperature range °F [°C] |
Tempering temperature range °F [°C] |
| P92 | Normalize and temper | 1900–1975 [1040–1080] | 1350–1470 [730–800] |
ASTM A335 P92 Seamless Pipes 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) | ||
ASTM A335 P92 Alloy Steel pipes elongation requirement
| Calculated Minimum Elongation Values | ||||
| Elongation in 2 in. or 50 mm, min % | ||||
| Wall Thickness | P5, P9, P11, P22 | P91, P92, P911 Table 4 longitudinal minimums (same calculated % values for these grades per ASTM A335). |
||
| in. | mm | Longitudinal | Transverse | Longitudinal |
| 5/16 (0.312) | 8 | 30 | 20 | 20 |
| 9/32 (0.281) | 7.2 | 28 | 19 | 19 |
| 1/4 (0.250) | 6.4 | 27 | 18 | 18 |
| 7/32 (0.219) | 5.6 | 26 | 17 | |
| 3/16 (0.188) | 4.8 | 24 | 16 | |
| 5/32 (0.156) | 4 | 22 | 15 | |
| 1/8 (0.125) | 3.2 | 21 | 14 | |
| 3/32 (0.094) | 2.4 | 20 | 13 | |
| 1/16 (0.062) | 1.6 | 18 | 12 | |
ASTM A335 P92 pipes Permissible Variations in Outside Diameter
Outside Diameter at any point shall not vary from standard specified more than:
| NPS [DN] Designator | Over | Under | ||
| in. | mm | in. | mm | |
| 1/8 to 1 1/2 [6 to 40], incl. | 1/64 (0.015) | 0.40 | 1/64 (0.015) | 0.40 |
| Over 1 1/2 to 4 [40 to 100], incl. | 1/32 (0.031) | 0.79 | 1/32 (0.031) | 0.79 |
| Over 4 to 8 [100 to 200], incl. | 1/16 (0.062) | 1.59 | 1/32 (0.031) | 0.79 |
| Over 8 to 12 [200 to 300], incl. | 3/32 (0.093) | 2.38 | 1/32 (0.031) | 0.79 |
| Over 12 [300] | +/- 1% of the specified outside diameter | |||
ASTM A335 P92 Seamless Pipes Required Markings on Each Length
(On tags attached to each bundle, when bundled.) Markings shall meet ASTM A999/A999M and shall be rolled, stamped, or stenciled at the manufacturer’s option.
| Typical markings in addition to A999/A999M | ||
| Length of pipe | As required by the order | |
| Schedule number | As specified | |
| Heat number (or manufacturer’s traceable identification) | Required | |
| Grade and specification | e.g. P92, ASTM A335 | |
| Supplementary requirements | Prefix S when a supplementary requirement applies (S1, S2, …) | |
| Weld repair | Pipe that has been weld repaired shall be marked WR. | |
| Marking to indicate the test method(s) | ||
| Hydrostatic | Nondestructive | Marking |
| YES | NO | Test Pressure |
| NO | YES | NDE |
| NO | NO | NH |
| YES | YES | Test Pressure / NDE |
| Common supplementary notations | ||
| 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 only, per standard text). | ||
Reference Documents for a335 P92 Alloy Steel Seamless Pipes
- 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 SB26.10M Welded and Seamless Wrought Steel Pipe
A335 P92 Alloy Steel pipes 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, P92 (or as specified) |
| Method of 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 | |
Frequently asked questions — ASTM A335 P92
What is ASTM A335 P92 used for?
ASTM A335 P92 is used for ultra-supercritical and other highly demanding high-temperature steam piping systems where tungsten-bearing 9Cr CSEF steel provides improved creep strength versus conventional chrome moly and, in many cases, versus P91.
How is P92 different from P91?
P92 typically has lower molybdenum than P91 and intentional tungsten additions (around 1.5–2%), with boron and microalloying controlled for creep performance. Always compare the exact ASTM chemistry tables and project material specifications before substitution.
Is ASME SA335 P92 available from Savoy Piping?
Yes. We supply ASTM A335 P92 / ASME SA335 Grade P92 seamless pipe to order with mill test certificates and inspection options aligned to the purchase order.
What documentation should I request with P92 pipe?
Request EN 10204 3.1 or 3.2 MTC showing heat chemistry, heat treatment, tensile/hardness results, and NDE/hydro status as ordered. For IBR boiler work, confirm whether Form III-C is also mandatory.
Supplying ASTM A335 P92 Alloy Steel Seamless Pipes to Countries -
We Export ASTM A335 P92 Alloy Steel Pipes to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen, Syria, Israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States of America, Canada, Mexico, Panama, Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherlands, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc
Savoy Piping Inc. is a well known worldwide Exporter of ASTM A335 P92 Alloy Steel Seamless Pipes, Savoy Piping Inc. is committed to provide each and every customer with the highest standard of customer service. We deal in A335 P92 Alloy Steel Seamless Pipes in India and Overseas, offering a wide range of ASTM A335 P92 Alloy Steel Seamless Pipes