ASTM A403/A403M-03

Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

SCOPE
1.1 This specification covers wrought stainless steel fittings for pressure piping applications.
1.2 Several grades of austenitic stainless steel alloys are included in this specification Grades are designated with a prefix, WP or CR, based on the applicable ANSI or MSS dimensional and rating standards, respectively.  
1.3 For each of the WP stainless grades, several classes of fittings are covered, to indicate whether seamless or welded construction was utilized. Class designations are also utilized to indicate the nondestructive test method and extent of nondestructive examination (NDE). Table 1 is a general summary of the fitting classes applicable to all WP grades of stainless steel covered by this specification. There are no classes for the CR grades. Specific requirements are covered elsewhere.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.  
1.5 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.
1.6 This specification does not apply to cast steel fittings. Austenitic stainless steel castings are covered in Specifications A351/A351M, A743/A743M, and A744/A744M.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.22 - Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications

Relations

• Replaces: ASTM A403/A403M-02 - Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
• Effective Date: 10-Apr-2003
• Replaced By: ASTM A403/A403M-03a - Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
• Effective Date: 10-May-2003
• Referred By: ASTM A960/A960M-23 - Standard Specification for Common Requirements for Wrought Steel Piping Fittings
• Effective Date: 10-Apr-2003
• Referred By: ASTM C1847-21 - Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems
• Effective Date: 10-Apr-2003
• Referred By: ASTM F1545-15a(2021) - Standard Specification for Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges
• Effective Date: 10-Apr-2003
• Referred By: ASTM A774/A774M-14(2019) - Standard Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures
• Effective Date: 10-Apr-2003
• Referred By: ASTM F1548-01(2023) - Standard Specification for Performance of Fittings for Use with Gasketed Mechanical Couplings Used in Piping Applications
• Effective Date: 10-Apr-2003
• Referred By: ASTM F1387-23 - Standard Specification for Performance of Piping and Tubing Mechanically Attached Fittings
• Effective Date: 10-Apr-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 403/A 403M – 03
Standard Specification for
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Wrought Austenitic Stainless Steel Piping Fittings
This standard is issued under the fixed designation A 403/A 403M; 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.
TABLE 1 Fitting Classes for WP Grades
1. Scope *
Class Construction Nondestructive Examination
1.1 This specification covers wrought stainless steel fittings
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S Seamless None
for pressure piping applications.
W Welded Radiography or Ultrasonic
1.2 Several grades of austenitic stainless steel alloys are
WX Welded Radiography
included in this specification Grades are designated with a
WU Welded Ultrasonic
prefix, WP or CR, based on the applicable ASME or MSS
dimensional and rating standards, respectively.
1.3 For each of the WP stainless grades, several classes of A 262 Practices for Detecting Susceptibility to Intergranu-
3
fittings are covered, to indicate whether seamless or welded
lar Attack in Austenitic Stainless Steels
construction was utilized. Class designations are also utilized A 351/A 351M Specification for Castings, Austenitic,
to indicate the nondestructive test method and extent of
Austenitic-Ferritic (Duplex), for Pressure-Containing
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nondestructive examination (NDE). Table 1 is a general Parts
summary of the fitting classes applicable to all WP grades of
A 370 Test Methods and Definitions for Mechanical Testing
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stainless steel covered by this specification. There are no of Steel Products
classes for the CR grades. Specific requirements are covered
A 388/A 388M Practice for Ultrasonic Examination of
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elsewhere. Heavy Steel Forgings
1.4 This specification is expressed in both inch-pound units
A 480/A 480M Specification for General Requirements for
and in SI units. However, unless the order specifies the Flat-Rolled Stainless and Heat-Resisting Steel Plate,
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applicable “M” specification designation (SI units), the mate-
Sheet, and Strip
rial shall be furnished to inch-pound units. A 743/A 743M Specification for Castings, Iron-Chromium,
1.5 The values stated in either inch-pound units or SI units
Iron-Chromium-Nickel, Corrosion-Resistant, for General
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are to be regarded separately as standard. Within the text, the Application
SI units are shown in brackets. The values stated in each
A 744/A 744M Specification for Castings, Iron-
system are not exact equivalents; therefore, each system must Chromium-Nickel, Corrosion-Resistant, for Severe Ser-
4
be used independently of the other. Combining values from the vice
two systems may result in nonconformance with the specifi- A 751 Test Methods, Practices, and Terminology for
3
cation. Chemical Analysis of Steel Products
1.6 This specification does not apply to cast steel fittings.
A 960 Specification for Common Requirements for
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Austenitic stainless steel castings are covered in Specifications Wrought Steel Piping Fittings
7
A 351/A 351M, A 743/A 743M, and A 744/A 744M.
E 112 Test Methods for Determining Average Grain Size
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E 165 Test Method for Liquid Penetrant Examination
2. Referenced Documents
E 213 Practice for Ultrasonic Examination of Metal Pipe
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2.1 ASTM Standards:
and Tubing
2.2 ASME Standards:
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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
Annual Book of ASTM Standards, Vol 01.03.
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and
4
Annual Book of ASTM Standards, Vol 01.02.
Bolting Materials for Piping and Special Purpose Applications.
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Annual Book of ASTM Standards, Vol 01.05.
Current edition approved Apr. 10, 2003. Published May 2003. Originally
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Annual Book of ASTM Standards, Vol 01.01.
approved in 1956. Last previous edition approved in 2002 as A 403/A 403M-02.
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2
Annual Book of ASTM Standards, Vol 03.01.
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
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Annual Book of ASTM Standards, Vol 03.03.
cation SA-403 in Section II of that Code.
*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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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 403/A 403M – 03
ASME B16.9 Factory-Made Wrought Steel Butt-Welding 4.2.3 One of the former followed by vacuum or electroslag-
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