ASTM A774/A774M-02

Standard Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures

SCOPE
1.1 This specification covers five grades of as-welded, wrought austenitic stainless steel fittings for low-pressure piping and intended for low and moderate temperatures and general corrosive service. Users should note that certain corrosive conditions may restrict the use of one or more grades. For applications requiring a product that requires heat treatment or full pressure rating refer to Specification A403/A403M. The term "fittings" applies to butt and socket welding parts such as 45° and 90° elbows, tees, reducers, wyes, laterals, crosses, and stub ends.  
1.2 This specification covers as-welded fittings 3 through 48 in. [75 through 1225 mm] in outside diameter and in nominal wall thicknesses 0.062 through 0.500 in. [1.6 through 12.7 mm]. Table 1 and Table 2 list the common diameters and nominal thicknesses of fittings in this specification.  
1.3 This specification does not apply to cast fittings. Cast austenitic steel fittings are covered by Specification A351/ A351M.  
1.4 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. These supplementary requirements call for additional tests. When desired, one or more of these may be specified in the order.  
1.5 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.  
1.6 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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2002
• ICS: 77.140.20 - Stainless steels
• 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 A774/A774M-00 - Standard Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures
• Effective Date: 10-Mar-2002
• Replaced By: ASTM A774/A774M-06 - Standard Specification for As-Welded Wrought Austenitic Stainless Steel Fittings for General Corrosive Service at Low and Moderate Temperatures
• Effective Date: 01-Mar-2006
• Referred By: ASTM A960/A960M-23 - Standard Specification for Common Requirements for Wrought Steel Piping Fittings
• Effective Date: 10-Mar-2002

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: A 774/A 774M – 02
Standard Specification for
As-Welded Wrought Austenitic Stainless Steel Fittings for
General Corrosive Service at Low and Moderate
1
Temperatures
This standard is issued under the fixed designationA 774/A 774M; 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.
1. Scope * 2. Referenced Documents
1.1 This specification covers five grades of as-welded, 2.1 In addition to those reference documents listed in
wrought austenitic stainless steel fittings for low-pressure Specification A 960, the following list of standards apply to
piping and intended for low and moderate temperatures and this specification:
general corrosive service. Users should note that certain 2.2 ASTM Standards:
corrosiveconditionsmayrestricttheuseofoneormoregrades. A 240/A 240M Specification for Chromium and
For applications requiring a product that requires heat treat- Chromium-Nickel Stainless Steel Plate, Sheet, and Strip
2
ment or full pressure rating, refer to Specification A 403/ for Pressure Vessels and for General Applications
A 403M.The term “fittings” applies to butt and socket welding A 351/A 351M Specification for Castings, Austenitic,
parts such as 45° and 90° elbows, tees, reducers, wyes, laterals, Austenistic-Ferritic (Duplex), for Pressure-Containing
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crosses, and stub ends. Parts
1.2 Thisspecificationcoversas-weldedfittings3through48 A 403/A 403M Specification for Wrought Austenitic Stain-
4
in. [75 through 1225 mm] in outside diameter and in nominal less Steel Piping Fittings
wall thicknesses 0.062 through 0.500 in. [1.6 through 12.7 A 960 Specification for Common Requirements for
4
mm]. Table 1 and Table 2 list the common diameters and Wrought Steel Piping Fittings
4
nominal thicknesses of fittings in this specification. E 527 Practice for Numbering Metals and Alloys (UNS)
1.3 This specification does not apply to cast fittings. Cast 2.3 ASME Standard:
austenitic steel fittings are covered by Specification A 351/ Section IX, Welding Qualtifications, ASME Boiler and
5
A 351M. Pressure Vessel Code
1.4 Optional supplementary requirements are provided for 2.4 MSS Standard:
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fittings where a greater degree of examination is desired.These SP 43 Wrought Stainless Steel Butt Welding Fittings
supplementary requirements call for additional tests. When 2.5 AWS Standards:
desired, one or more of these may be specified in the order. A5.4 Corrosion-Resisting Chromium and Chromium-
7
1.5 This specification is expressed in both inch-pound units Nickel Steel Covered Welding Electrodes
and in SI units. However, unless the order specifies the A5.9 Corrosion-Resisting Chromium and Chromium-
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applicable “M” specification designation (SI units), the mate- Nickel Steel Welding Rods and Bare Electrodes
rial shall be furnished to inch-pound units. 2.6 SAE Standard:
8
1.6 The values stated in either inch-pound units or SI units J1086 Unified Numbering System for Metals and Alloys
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
2
Annual Book of ASTM Standards, Vol 01.03.
two systems may result in nonconformance with the specifi-
3
Annual Book of ASTM Standards, Vol 01.02.
cation.
4
Annual Book of ASTM Standards, Vol 01.01.
5
Available from American Society of Mechanical Engineers (ASME Interna-
tional), Three Park Ave., New York, NY 10016-5990.
1 6
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Available from the Manufacturers’ Standardization Society of the Valve and
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee Fittings Industry, 127 Park St., NE, Vienna, VA 22180-4602.
7
A01.22 on Steel Forgings and Wrought Fittings for PipingApplications and Bolting Available from American Welding Society, 550 NW LeJeune Rd., Miami, FL
Materials for Piping and Special Purpose Applications. 33126.
8
Current edition approved Mar. 10, 2002. Published May 2002. Originally Available from Society of Automotive Engineers, 400 Commonwealth Dr.,
published as A 774 – 80. Last previous edition A 774/A 774M – 00. Warrendale, PA 15096-0001.
*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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A 774/A 774M – 02
A
TABLE 1 Common Tubular Fittings Sizes, Outside Diameter
5. Manufacture
in. [mm] in. [mm]
5.1 The fittings
...