ASTM A778/A778M-22
(Specification)Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products
Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products
ABSTRACT
This specification covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperatures and corrosive service where treatment is not necessary for corrosion resistance. The tubular products shall be made from flat-rolled steel sheet, coil, or plate by a shielded arc-welding process. The welds shall be made by the manual or automatic electric-welding process. Injurious weld defects shall be repaired by removal to sound metal and rewelding. Transverse tension test and transverse-guided bend test shall be done to the welded joints. Finished products shall have smooth ends free or burrs and shall be free of injurious defects.
SCOPE
1.1 This specification covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperatures and corrosive service where heat treatment is not necessary for corrosion resistance. Table 1 lists the five grades covered by this specification. The user of this specification should be aware that a minimum amount of testing and examination is required of the basic product. The user requiring additional testing or examination is referred to the supplemental requirements or Ordering Information, or both. Users requiring a tubular product with post-weld heat treatment or with radiographic examination are referred to Specification A312/A312M, A358/A358M, or A409/A409M, as applicable.
1.2 This specification covers welded unannealed tubular products 3 in. [75 mm] through 48 in. [1200 mm] in outside diameter and in nominal wall thicknesses of 0.062 in. [1.57 mm] through 0.500 in. [12.70 mm] produced to this specification. Tubular products having other diameters or wall thickness, or both, may be furnished provided it complies with all other requirements of this specification.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, 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 the 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.
1.4 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.
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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.
Designation:A778/A778M −22
Standard Specification for
Welded, Unannealed Austenitic Stainless Steel Tubular
1
Products
This standard is issued under the fixed designationA778/A778M; 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* 2. Referenced Documents
2
1.1 This specification covers straight seam and spiral butt 2.1 ASTM Standards:
seam welded unannealed austenitic stainless steel tubular A240/A240M Specification for Chromium and Chromium-
products intended for low and moderate temperatures and Nickel Stainless Steel Plate, Sheet, and Strip for Pressure
corrosive service where heat treatment is not necessary for Vessels and for General Applications
corrosion resistance. Table 1 lists the five grades covered by A262 Practices for Detecting Susceptibility to Intergranular
this specification. The user of this specification should be Attack in Austenitic Stainless Steels
aware that a minimum amount of testing and examination is A312/A312M Specification for Seamless, Welded, and
required of the basic product. The user requiring additional Heavily Cold Worked Austenitic Stainless Steel Pipes
testing or examination is referred to the supplemental require- A358/A358M Specification for Electric-Fusion-Welded
ments or Ordering Information, or both. Users requiring a Austenitic Chromium-Nickel Stainless Steel Pipe for
tubular product with post-weld heat treatment or with radio- High-Temperature Service and General Applications
graphic examination are referred to Specification A312/ A370 Test Methods and Definitions for Mechanical Testing
A312M, A358/A358M,or A409/A409M, as applicable. of Steel Products
A409/A409M Specification for Welded Large Diameter
1.2 This specification covers welded unannealed tubular
Austenitic Steel Pipe for Corrosive or High-Temperature
products 3 in. [75 mm] through 48 in. [1200 mm] in outside
Service
diameter and in nominal wall thicknesses of 0.062 in. [1.57
A700 Guide for Packaging, Marking, and Loading Methods
mm] through 0.500 in. [12.70 mm] produced to this specifica-
for Steel Products for Shipment
tion. Tubular products having other diameters or wall
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
thickness, or both, may be furnished provided it complies with
Alloys, and Ferroalloys
all other requirements of this specification.
A999/A999M Specification for General Requirements for
1.3 The values stated in either inch-pound units or SI units
Alloy and Stainless Steel Pipe
are to be regarded separately as standard. Within the text, SI
E340 Practice for Macroetching Metals and Alloys
units are shown in brackets. The values stated in each system
E527 Practice for Numbering Metals and Alloys in the
may not be exact equivalents; therefore, each system shall be
Unified Numbering System (UNS)
used independently of the other. Combining the values from
2.2 AWS Standards:
the two systems may result in non-conformance with the
A5.4 Corrosion—Resisting Chromium and Chromium-
standard. The inch-pound units shall apply unless the “M”
3
Nickel Steel Covered Welding Electrodes
designation of this specification is specified in the order.
A5.9 Corrosion–ResistingChromiumandChromium-Nickel
3
1.4 This international standard was developed in accor-
Steel Welding Rods and Bare Electrodes
dance with internationally recognized principles on standard-
2.3 SAE Standard:
ization established in the Decision on Principles for the
SAE J1086 Practice for Numbering Metals and Alloys
Development of International Standards, Guides and Recom- 4
(UNS)
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee the ASTM website.
3
A01.10 on Stainless and Alloy Steel Tubular Products. Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
Current edition approved Sept. 1, 2022. Published September 2022. Originally Miami, FL 33126, http://www.aws.org.
4
approved in 1980. Last previous edition approved in 2021 as A778/A778M – 16 Available from Society of Automotive Engineers (SAE), 400 Commonwealth
(2021). DOI: 10.1520/A0778_A0778M
...
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: A778/A778M − 16 (Reapproved 2021) A778/A778M − 22
Standard Specification for
Welded, Unannealed Austenitic Stainless Steel Tubular
1
Products
This standard is issued under the fixed designation A778/A778M; 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 Scope*
1.1 This specification covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products
intended for low and moderate temperatures and corrosive service where heat treatment is not necessary for corrosion resistance.
Table 1 lists the five grades covered by this specification. The user of this specification should be aware that a minimum amount
of testing and examination is required of the basic product. The user requiring additional testing or examination is referred to the
supplemental requirements or Ordering Information, or both. Users requiring a tubular product with post-weld heat treatment or
with radiographic examination are referred to Specification A312/A312M, A358/A358M, or A409/A409M, as applicable.
1.2 This specification covers welded unannealed tubular products 3 in. [75 mm] through 48 in. [1200 mm] in outside diameter and
in nominal wall thicknesses of 0.062 in. [1.57 mm] through 0.500 in. [12.70 mm] produced to this specification. Tubular products
having other diameters or wall thickness, or both, may be furnished provided it complies with all other requirements of this
specification.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, 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 the 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.
1.4 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
2
2.1 ASTM Standards:
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and
for General Applications
A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
A312/A312M Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A358/A358M Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature
Service and General Applications
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, 2021Sept. 1, 2022. Published April 2021September 2022. Originally approved in 1980. Last previous edition approved in 20162021
as A778/A778M – 16.A778/A778M – 16 (2021). DOI: 10.1520/A0778_A0778M-16R21.10.1520/A0778_A0778M-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
A778/A778M − 22
TABLE 1 Chemical Requirements
Composition, %
Manga- Phos- Columbium
UNS Carbon Nitrogen,
Grade nese, phorus, Titanium Plus
A B Sulfur, Silicon,
Designation max max
Chromium Nickel
max max Tantalum
max max
TP 304L S30403 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–13.0 . . . 0.10
TP 316L S31603 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00 . . 0.10
3.00
TP 317L S31703 0.030 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0 . . 0.10
4.0
C
TP 321 S32100 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . .
D
TP 347 S3470
...
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: A778/A778M − 22
Standard Specification for
Welded, Unannealed Austenitic Stainless Steel Tubular
1
Products
This standard is issued under the fixed designation A778/A778M; 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* 2. Referenced Documents
2
1.1 This specification covers straight seam and spiral butt 2.1 ASTM Standards:
seam welded unannealed austenitic stainless steel tubular A240/A240M Specification for Chromium and Chromium-
products intended for low and moderate temperatures and Nickel Stainless Steel Plate, Sheet, and Strip for Pressure
corrosive service where heat treatment is not necessary for Vessels and for General Applications
corrosion resistance. Table 1 lists the five grades covered by A262 Practices for Detecting Susceptibility to Intergranular
this specification. The user of this specification should be Attack in Austenitic Stainless Steels
aware that a minimum amount of testing and examination is A312/A312M Specification for Seamless, Welded, and
required of the basic product. The user requiring additional Heavily Cold Worked Austenitic Stainless Steel Pipes
testing or examination is referred to the supplemental require- A358/A358M Specification for Electric-Fusion-Welded
ments or Ordering Information, or both. Users requiring a Austenitic Chromium-Nickel Stainless Steel Pipe for
tubular product with post-weld heat treatment or with radio- High-Temperature Service and General Applications
graphic examination are referred to Specification A312/ A370 Test Methods and Definitions for Mechanical Testing
A312M, A358/A358M, or A409/A409M, as applicable. of Steel Products
A409/A409M Specification for Welded Large Diameter
1.2 This specification covers welded unannealed tubular
Austenitic Steel Pipe for Corrosive or High-Temperature
products 3 in. [75 mm] through 48 in. [1200 mm] in outside
Service
diameter and in nominal wall thicknesses of 0.062 in. [1.57
A700 Guide for Packaging, Marking, and Loading Methods
mm] through 0.500 in. [12.70 mm] produced to this specifica-
for Steel Products for Shipment
tion. Tubular products having other diameters or wall
A941 Terminology Relating to Steel, Stainless Steel, Related
thickness, or both, may be furnished provided it complies with
Alloys, and Ferroalloys
all other requirements of this specification.
A999/A999M Specification for General Requirements for
1.3 The values stated in either inch-pound units or SI units
Alloy and Stainless Steel Pipe
are to be regarded separately as standard. Within the text, SI
E340 Practice for Macroetching Metals and Alloys
units are shown in brackets. The values stated in each system
E527 Practice for Numbering Metals and Alloys in the
may not be exact equivalents; therefore, each system shall be
Unified Numbering System (UNS)
used independently of the other. Combining the values from
2.2 AWS Standards:
the two systems may result in non-conformance with the
A5.4 Corrosion—Resisting Chromium and Chromium-
standard. The inch-pound units shall apply unless the “M”
3
Nickel Steel Covered Welding Electrodes
designation of this specification is specified in the order.
A5.9 Corrosion–Resisting Chromium and Chromium-Nickel
3
1.4 This international standard was developed in accor-
Steel Welding Rods and Bare Electrodes
dance with internationally recognized principles on standard-
2.3 SAE Standard:
ization established in the Decision on Principles for the
SAE J1086 Practice for Numbering Metals and Alloys
4
Development of International Standards, Guides and Recom-
(UNS)
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee the ASTM website.
3
A01.10 on Stainless and Alloy Steel Tubular Products. Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
Current edition approved Sept. 1, 2022. Published September 2022. Originally Miami, FL 33126, http://www.aws.org.
4
approved in 1980. Last previous edition approved in 2021 as A778/A778M – 16 Available from Society of Automotive Engineers (SAE), 400 Commonwealth
(2021). DOI: 10.1520/A0778_A0778M-22. Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*A Summary of Changes section appears at the end of this standard
C
...
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