Alloy Steel Pipe ASTM A335 Pipes, Alloy Steel Equivalent/ Alloy Steel Material Grades / Alloy Steel Equivalent Standard
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Alloy Steel Pipe, ASTM A335, ASME SA335 Key Specifications / Features
Mainly Grade of ASTM A335:ASTM A335 P11, P22, P5, P9, P91, P92
Chemical Composition (%) for the main grade
|Grade ||C ||Mn ||P, S, max ||Si ||Cr ||Mo |
|P11 ||0.05-0.15 ||0.30-0.60 ||0.025 ||0.50-1.00 ||1.00-1.50 ||0.44-0.65 |
|P22 ||0.05-0.15 ||0.30-0.60 ||0.025 ||0.50 max ||1.90-2.60 ||0.87-1.13 |
|P5 ||0.15 max ||0.30-0.60 ||0.025 ||0.50 max ||4.00-6.00 ||0.45-0.65 |
|P9 ||0.15 max ||0.30-0.60 ||0.025 ||0.25-1.00 ||8.00-10.00 ||0.90-1.10 |
|P91 ||0.08-0.12 ||0.30-0.60 ||0.020/0.010 ||0.20-0.50 ||8.00-9.50 ||0.85-1.05 |
|V 0.18-0.25 ||N 0.03-0.07 ||Ni 0.40 max ||Al 0.02 max ||Nb 0.06-0.10 ||Ti 0.01 max |
|P92||0.07-0.13 ||0.30-0.60 ||0.020/0.010 ||0.50 max ||8.50-9.50 ||0.30-0.60 |
|V 0.15-0.25 ||N 0.03-0.07 ||Ni 0.40 max ||Al 0.02 max ||Nb 0.04-0.09 ||W 1.50-2.00 |
|B 0.001-0.006 ||Ti 0.01 max ||Zr 0.01 max |
|Data||Grade P11, P22, P5, P9 ||Grade P91 ||Grade P92 |
|Tensile strength, min, (MPa)||415 ||585 ||620 |
|Yield strength, min, (MPa)||205 ||415 ||440 |
|Elongation, min, (%), L/T||30/20 ||20/… ||20/… |
|Heat Treatment||A / N+T ||N+T / Q+T ||N+T |
Material & ManufacturePipe 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]
|P5 (b,c)||Full or Isothermal Anneal|
|Normalize and Temper||*****||1250 |
|Subcritical Anneal (P5c only)||*****||1325 – 1375 [715 - 745]|
|P9||Full or Isothermal Anneal|
|Normalize and Temper||*****||1250 |
|P11||Full or Isothermal Anneal|
|Normalize and Temper||*****||1200 |
|P22||Full or Isothermal Anneal|
|Normalize and Temper||*****||1250 |
|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 SpecifiedTransverse 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 TestThe 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 InformationOrders 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|
- 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
This 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. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1.1 This specification2 covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for hightemperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics. 1.2 Several grades of ferritic steels (see Note 1) are covered. Their compositions are given in Table 1.
NOTE 1—Ferritic steels in this specification are defined as low- and intermediate-alloy steels containing up to and including 10 % chromium.
1.3 Supplementary requirements (S1 to S7) of an optional nature are provided. These supplementary requirements call for additional tests to be made, and when desired, shall be so stated in the order together with the number of such tests required. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
NOTE 2—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
2. Referenced Documents 2.1 ASTM Standards: 3
A 9/A 9M Specification for General Requirements for
Alloy and Stainless Steel Pipe
E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
E 381 Method of Macroetch Testing Steel Bars, Billets,
Blooms, and Forgings
E 527 Practice for Numbering Metals and Alloys (UNS) E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products 2.2 ASME Standard: B36.10M Welded and Seamless Wrought Steel Pipe 2.3 Other Documents: SNT-TC-1A Recommended Practice for Nondestructive
Personnel Qualification and Certification4
SAE J 1086 Practice for Numbering Metals and Alloys (UNS)5
3. Ordering Information
3.1 Orders for material under this specification should include the following, as required, to describe the desired material adequately: 3.1.1 Quantity (feet, metres, or number of lengths), 3.1.2 Name of material (seamless alloy steel pipe), 3.1.3 Grade (Table 1), 3.1.4 Manufacture (hot-finished or cold-drawn), 3.1.5 Size using one of the following: 126.96.36.199 NPS and schedule number, 188.8.131.52 Outside diameter and nominal wall thickness, 184.108.40.206 Outside diameter and minimum wall thickness, 220.127.116.11 Inside diameter and nominal wall thickness, and 18.104.22.168 Inside diameter and minimum wall thickness. 3.1.6 Length (specific or random), 3.1.7 End finish (Ends Section of Specification A 9/ A 999M),
1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.10 on Stainless and Alloy Steel Tubular Products.
Alloy Steel Equivalent Grades
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