ASTM A778/A778M-15
(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. (A) New designation established in accordance with Practice E527 and SAE J1086.(B) The carbon analysis shall be reported to the nearest 0.01 %, except for the low carbon (0.030) types, which shall be reported to the nearest 0.001 %.(C) The titanium content shall be not less than five times the carbon content and not more than 0.70 %.(D) The columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.10 %.
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.
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Designation:A778/A778M −15
StandardSpecification 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* A240/A240M Specification for Chromium and Chromium-
Nickel Stainless Steel Plate, Sheet, and Strip for Pressure
1.1 This specification covers straight seam and spiral butt
Vessels and for General Applications
seam welded unannealed austenitic stainless steel tubular
A262 Practices for Detecting Susceptibility to Intergranular
products intended for low and moderate temperatures and
Attack in Austenitic Stainless Steels
corrosive service where heat treatment is not necessary for
A312/A312M Specification for Seamless, Welded, and
corrosion resistance. Table 1 lists the five grades covered by
Heavily Cold Worked Austenitic Stainless Steel Pipes
this specification. The user of this specification should be
A358/A358M Specification for Electric-Fusion-Welded
aware that a minimum amount of testing and examination is
Austenitic Chromium-Nickel Stainless Steel Pipe for
required of the basic product. The user requiring additional
High-Temperature Service and General Applications
testing or examination is referred to the supplemental require-
A370 Test Methods and Definitions for Mechanical Testing
ments or Ordering Information, or both. Users requiring a
of Steel Products
tubular product with post-weld heat treatment or with radio-
A409/A409M Specification for Welded Large Diameter
graphic examination are referred to Specification A312/
Austenitic Steel Pipe for Corrosive or High-Temperature
A312M, A358/A358M,or A409/A409M, as applicable.
Service
1.2 This specification covers welded unannealed tubular
A700 Guide for Packaging, Marking, and Loading Methods
products 3 in. [75 mm] through 48 in. [1200 mm] in outside
for Steel Products for Shipment
diameter and in nominal wall thicknesses of 0.062 in. [1.57
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
mm] through 0.500 in. [12.70 mm] produced to this specifica-
Alloys, and Ferroalloys
tion. Tubular products having other diameters or wall
A999/A999M Specification for General Requirements for
thickness, or both, may be furnished provided it complies with
Alloy and Stainless Steel Pipe
all other requirements of this specification.
E340 Practice for Macroetching Metals and Alloys
E527 Practice for Numbering Metals and Alloys in the
1.3 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, SI Unified Numbering System (UNS)
units are shown in brackets. The values stated in each system
2.2 AWS Standards:
may not be exact equivalents; therefore, each system shall be
A5.4 Corrosion—Resisting Chromium and Chromium-
3
used independently of the other. Combining the values from
Nickel Steel Covered Welding Electrodes
the two systems may result in non-conformance with the
A5.9 Corrosion–ResistingChromiumandChromium-Nickel
3
standard. The inch-pound units shall apply unless the “M”
Steel Welding Rods and Bare Electrodes
designation of this specification is specified in the order.
2.3 SAE Standard:
SAE J1086 Practice for Numbering Metals and Alloys
2. Referenced Documents
4
(UNS)
2
2.1 ASTM Standards:
3. Terminology
3.1 Definitions:
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
3.2 The definitions in Specification A999/A999M and Ter-
A01.10 on Stainless and Alloy Steel Tubular Products.
minology A941 are applicable to this specification.
Current edition approved Sept. 1, 2015. Published September 2015. Originally
ɛ1
approved in 1980. Last previous edition approved in 2009 as A778 – 01 (2009) .
DOI: 10.1520/A0778_A0778M-15.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Miami, FL 33126, http://www.aws.org.
4
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, http://www.sae.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
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A778/A778M−15
TABLE 1 Chemical Requirements
Compositi
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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.
´1
Designation: A778 − 01 (Reapproved 2009) A778/A778M − 15
Standard Specification for
Welded, Unannealed Austenitic Stainless Steel Tubular
1
Products
This standard is issued under the fixed designation A778;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
ε NOTE—The units statement in paragraph 1.3 was revised editorially in April 2009.
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)[75 mm] through 48 in. (1200 mm)[1200 mm]
in outside diameter and in nominal wall thicknesses of 0.062 in. (1.5 mm)[1.57 mm] through 0.500 in. (12.5 mm)[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 as standard. The values given in parentheses are
mathematical conversions to SI units that are provided for information only and are not considered standard.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.
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
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A409/A409M Specification for Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E340 Practice for Macroetching Metals and Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 AWS Standards:
3
A5.4 Corrosion—Resisting Chromium and Chromium-Nickel Steel Covered Welding Electrodes
3
A5.9 Corrosion–Resisting Chromium and Chromium-Nickel Steel Welding Rods and Bare Electrodes
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 April 1, 2009Sept. 1, 2015. Published September 2009September 2015. Originally approved in 1980. Last previous edition approved in 20012009
ɛ1
as A778 – 01.A778 – 01 (2009) . DOI: 10.1520/A0778-01R09E01.10.1520/A0778_A0778M-15.
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.
3
Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami,
...
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