ASTM A949/A949M-01(2005)

Standard Specification for Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe

ABSTRACT
This specification covers spray-formed seamless ferritic/austenitic stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. The steel shall be made by the electric-furnace process and the pipe shall be made by the spray forming process using the melt from the primary melting. The as spray formed tubes shall be machined on both the inner and outer surfaces. All pipes shall be furnished in the heat-treated and descaled conditions. These pipes shall be free of contaminating iron particles. The specimens shall undergo transverse or longitudinal tension test, flattening test and hydrostatic test.
SCOPE
1.1 This specification covers spray-formed seamless ferritic/austenitic stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
1.2 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and when desired, one or more of these may be specified in the order.
1.3 Appendix X1 of this specification lists the dimensions of seamless stainless steel pipe as shown in ANSI B 36.19. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification.
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 1--The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."

General Information

• Status: Historical
• Publication Date: 31-Aug-2005
• 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

Relations

• Replaces: ASTM A949/A949M-01 - Standard Specification for Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe
• Effective Date: 01-Sep-2005
• Replaced By: ASTM A949/A949M-01(2009) - Standard Specification for Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe
• Effective Date: 01-Oct-2009
• Referred By: ASTM A999/A999M-23 - Standard Specification for General Requirements for Alloy and Stainless Steel Pipe
• Effective Date: 01-Sep-2005

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: A949/A949M – 01 (Reapproved 2005)
Standard Specification for
Spray-Formed Seamless Ferritic/Austenitic Stainless Steel
1
Pipe
This standard is issued under the fixed designationA949/A949M; 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.
1. Scope A999/A999M Specification for General Requirements for
Alloy and Stainless Steel Pipe
1.1 Thisspecificationcoversspray-formedseamlessferritic/
E381 Method of Macroetch Testing Steel Bars, Billets,
austenitic stainless steel pipe intended for general corrosive
Blooms, and Forgings
service, with particular emphasis on resistance to stress corro-
E527 Practice for Numbering Metals and Alloys in the
sion cracking. These steels are susceptible to embrittlement if
Unified Numbering System (UNS)
used for prolonged periods at elevated temperatures.
2.2 ANSI/ASME Standards:
1.2 Optional supplementary requirements are provided for
3
B 1.20.1 Pipe Threads, General Purpose
pipe where a greater degree of testing is desired. These
3
B 36.10M-1995 Welded and Seamless Wrought Steel Pipe
supplementaryrequirementscallforadditionalteststobemade
B 36.19 Stainless Steel Pipe
and when desired, one or more of these may be specified in the
2.3 Other Standard:
order.
SAE J1086 Practice for Numbering Metals and Alloys
1.3 AppendixX1ofthisspecificationliststhedimensionsof
4
(UNS)
seamless stainless steel pipe as shown in ANSI B 36.19. Pipe
having other dimensions may be furnished provided such pipe
3. Terminology
complies with all other requirements of this specification.
3.1 Definitions:
1.4 The values stated in either inch-pound units or SI units
3.1.1 Fordefinitionsoftermsusedinthisspecification,refer
are to be regarded separately as standard. Within the text, the
to Terminology A941.
SI units are shown in brackets. The values stated in each
3.2 Definitions of Terms Specific to This Standard:
system are not exact equivalents; therefore, each system must
3.2.1 spray-formed—denotes the fabrication of different
be used independently of the other. Combining values from the
shapes of a metallic material by deposition of a spray,
two systems may result in nonconformance with the specifi-
consisting of droplets, solid particles, and particles that are
cation. The inch-pound units shall apply unless the “M”
partially solid, onto a moving substrate.
designation of this specification is specified in the order.
3.2.1.1 Discussion—The spray is produced by gas atomiza-
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
tion of the liquid metal or alloy. On impingement with the
been substituted in this standard for such traditional terms as “nominal
substrate, the species of the spray consolidate and solidify
diameter,” “size,” and “nominal size.”
completely to produce a product that is essentially free of
porosity. The metallurgical characteristics of the spray-formed
2. Referenced Documents
productarecontrolledprimarilybythethermalconditionofthe
2
2.1 ASTM Standards:
spray, and that of the surface of the metallic deposit formed on
A450/A450M Specification for General Requirements for
the substrate.
Carbon and Low Alloy Steel Tubes
A941 Terminology Relating to Steel, Stainless Steel, Re-
4. Ordering Information
lated Alloys, and Ferroalloys
4.1 Orders for material under this specification should
include the following, as required, to describe the desired
material adequately:
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
4.1.1 Quantity (feet, metres, or number of lengths),
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
4.1.2 Name of material (ferritic/austenitic steel pipe),
A01.10 on Stainless and Alloy Steel Tubular Products.
Current edition approved Sept. 1, 2005. Published October 2005. Originally
approved in 1995. Last previous edition approved in 2001 as A949/A949M – 01.
DOI: 10.1520/A0949_A0949M-01R05.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 4th Floor, New York, NY 10036.
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Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001.
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A949/A949M – 01 (2005)
4.1.3 Grade (Table 1), shall consist of the following number o
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