ASTM A335/A335M-21a

Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

ABSTRACT
This specification covers seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.
SCOPE
1.1 This specification2 covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature 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 S8) of an optional nature are provided. Supplementary requirements S1 through S6 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 SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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.”  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Oct-2021
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.10 - Stainless and Alloy Steel Tubular Products

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A335/A335M −21a
Standard Specification for
Seamless Ferritic Alloy-Steel Pipe for High-Temperature
1
Service
This standard is issued under the fixed designationA335/A335M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 1.5 This international standard was developed in accor-
2 dance with internationally recognized principles on standard-
1.1 This specification covers nominal wall and minimum
ization established in the Decision on Principles for the
wall seamless ferritic alloy-steel pipe intended for high-
Development of International Standards, Guides and Recom-
temperature service. Pipe ordered to this specification shall be
mendations issued by the World Trade Organization Technical
suitable for bending, flanging (vanstoning), and similar form-
Barriers to Trade (TBT) Committee.
ing operations, and for fusion welding. Selection will depend
upon design, service conditions, mechanical properties, and
2. Referenced Documents
high-temperature characteristics.
3
2.1 ASTM Standards:
1.2 Severalgradesofferriticsteels(seeNote1)arecovered.
A999/A999MSpecification for General Requirements for
Their compositions are given in Table 1.
Alloy and Stainless Steel Pipe
E92Test Methods for Vickers Hardness and Knoop Hard-
NOTE 1—Ferritic steels in this specification are defined as low- and
intermediate-alloy steels containing up to and including 10% chromium. ness of Metallic Materials
E213Practice for Ultrasonic Testing of Metal Pipe and
1.3 Supplementary requirements (S1 to S8) of an optional
Tubing
nature are provided. Supplementary requirements S1 through
E309Practice for Eddy Current Examination of Steel Tubu-
S6 call for additional tests to be made, and when desired, shall
lar Products Using Magnetic Saturation
be so stated in the order together with the number of such tests
E381Method of Macroetch Testing Steel Bars, Billets,
required.
Blooms, and Forgings
1.4 The values stated in either SI units or inch-pound units
E527Practice for Numbering Metals and Alloys in the
are to be regarded separately as standard. Within the text, the
Unified Numbering System (UNS)
SI units are shown in brackets. The values stated in each
E570Practice for Flux Leakage Examination of Ferromag-
system may not be exact equivalents; therefore, each system
netic Steel Tubular Products
shall be used independently of the other. Combining values
2.2 ASME Standard:
from the two systems may result in non-conformance with the
B36.10MWelded and Seamless Wrought Steel Pipe
standard. The inch-pound units shall apply unless the “M” 4
2.3 AWS Specifications
designation of this specification is specified in the order.
A5.5/A5.5MSpecification for Low-Alloy Steel Electrodes
for Shielded Metal Arc Welding
NOTE 2—The dimensionless designator NPS (nominal pipe size) has
been substituted in this standard for such traditional terms as “nominal
A5.23/A5.23MSpecification for Low-Alloy Steel Elec-
diameter,” “size,” and “nominal size.”
trodes and Fluxes for Submerged Arc Welding
A5.28/A5.28MSpecification for Low-Alloy Steel Elec-
trodes for Gas Shielded Arc Welding
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
3
A01.10 on Stainless and Alloy Steel Tubular Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2021. Published November 2021. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1951. Last previous edition approved in 2021 as A335/A335M–21. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0335_A0335M-21A. the ASTM website.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
cation SA-335 in Section II of that Code. Miami, FL 33126, http://www.aws.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A335/A335M−21a
TABLE 1 Chemical Requirements
UNS Composition, %
Designa-
Phos- Molybde-
Grade A
Man- Sulfur,
tion
Carbon phorus, Silicon Chromium num Others
ganese max
max
P1 K11522 0.10–0.20 0.30–0.80 0.025 0.025 0.10–0.50 . . . 0.44–0.65 . . .
P2 K11547 0.10–0.20 0.30–0.61 0.025 0.025 0.10–0.30 0.50–0.81 0.44–0.65
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A335/A335M − 21 A335/A335M − 21a
Standard Specification for
Seamless Ferritic Alloy-Steel Pipe for High-Temperature
1
Service
This standard is issued under the fixed designation A335/A335M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
2
1.1 This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature
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 S8) of an optional nature are provided. Supplementary requirements S1 through S6 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 SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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.”
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
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.
Current edition approved March 1, 2021Nov. 1, 2021. Published March 2021November 2021. Originally approved in 1951. Last previous edition approved in 20192021
as A335/A335M – 19a.A335/A335M – 21. DOI: 10.1520/A0335_A0335M-21.10.1520/A0335_A0335M-21A.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-335 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
A335/A335M − 21a
TABLE 1 Chemical Requirements
UNS Composition, %
Designa-
Phos- Molybde-
Grade A
Man- Sulfur,
tion
Carbon phorus, Silicon Chromium num Others
ganese max
max
P1 K11522 0.10–0.20 0.30–0.80 0.025 0.025 0.10–0.50 . . . 0.44–0.65 . . .
P2 K11547 0.10–0.20 0.30–0.61 0.025 0.025 0.10–0.30 0.50–0.81 0.44–0.65 . . .
P5 K41545 0.15 max 0.30–0.60 0.025 0.025 0.50 max 4.00–6.00 0.45–0.65 . . .
P5b K51545 0.15 max 0.30–0.60 0.025 0.025 1.00–2.00 4.00–6.00 0.45–0.65 . . .
B
P5c K41245 0.12 max 0.30–0.60 0.025 0.025 0.50 max 4.00–6.00 0.45–0.65 . . .
P9 K90941 0.15 max 0.30–0.60 0.025 0.025 0.25–1.00 8.00–10.00 0.90–1.10 . . .
P11 K11597 0.05–0.15 0.30–0.60 0.025 0.025 0.50–1.00 1.00–1.50 0.44–0.65 . . .
P12 K11562 0.05–0.15 0.30–0.61 0.025 0.025 0.50 max 0.80–1.25 0.44–0.65 . . .
P15 K11578 0.05–0.15 0.30–0.60 0.025 0.025 1.15–1.65 . . . 0.44–0.65 . . .
P21 K31545 0.05
...