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: A815/A815M − 23

Standard Specification for

Wrought Ferritic, Ferritic/Austenitic, and Martensitic
Stainless Steel Piping Fittings1
This standard is issued under the fixed designation A815/A815M; 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* 1.5 The values stated in either SI units or inch-pound units

1.1 This specification covers two general classes, WP and are to be regarded separately as standard. Within the text, the
CR, of wrought ferritic, ferritic/austenitic, and martensitic SI units are shown in brackets. The values stated in each
stainless steel fittings of seamless and welded construction system may not be exact equivalents; therefore, each system
covered by the latest revision of Specification A960/A960M. shall be used independently of the other. Combining values
Fittings differing from these standards may be furnished in from the two systems may result in non-conformance with the
accordance with Supplementary Requirement S58 of Specifi- standard.
cation A960/A960M. 1.6 This international standard was developed in accor-
1.1.1 Class WP fittings are subdivided into four subclasses: dance with internationally recognized principles on standard-
Classes WP-S, WP-W, WP-WX, and WP-WU. They are ization established in the Decision on Principles for the
manufactured to the requirements of Specification A960/ Development of International Standards, Guides and Recom-
A960M, and they shall have pressure ratings compatible with mendations issued by the World Trade Organization Technical
13.2. Class WP-S fittings are those manufactured from seam- Barriers to Trade (TBT) Committee.
less product by a seamless method of manufacture (marked
with class symbol WP-S); Class WP-W fittings are those which 2. Referenced Documents
contain welds where the fitting fabrication or construction
welds have been radiographed (marked with class symbol 2.1 ASTM Standards:2
WP-W); and Class WP-WX fittings are those which contain A262 Practices for Detecting Susceptibility to Intergranular
welds where all welds have been radiographed (marked with Attack in Austenitic Stainless Steels
class symbol WP-WX); and Class WP-WU fittings are those A388/A388M Practice for Ultrasonic Examination of Steel
which contain welds where all welds have been ultrasonically Forgings
tested (marked with class symbol WP-WU). A751 Test Methods and Practices for Chemical Analysis of
1.1.2 Class CR fittings are those manufactured to the Steel Products
requirements of MSS SP-43, and they shall have pressure A763 Practices for Detecting Susceptibility to Intergranular
ratings compatible with 13.3. Attack in Ferritic Stainless Steels
A923 Test Methods for Detecting Detrimental Intermetallic
1.2 This specification does not apply to cast fittings. Phase in Duplex Austenitic/Ferritic Stainless Steels
1.3 Optional supplementary requirements are provided. A960/A960M Specification for Common Requirements for
When desired, one or more of these may be specified in the Wrought Steel Piping Fittings
order. E165/E165M Practice for Liquid Penetrant Testing for Gen-
1.4 This specification is expressed in both inch-pound units eral Industry
and in SI units. However, unless the order specifies the 2.2 ASME Standards:3
applicable “M” specification designation [SI units], the mate- B16.9 Factory-Made Wrought Butt-Welding Fittings
rial shall be furnished to inch-pound units. B16.11 Forged Fittings, Socket-Welding and Threaded

1 2
This specification is under the jurisdiction of ASTM Committee A01 on Steel, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Standards volume information, refer to the standard’s Document Summary page on
Materials for Piping and Special Purpose Applications. the ASTM website.
3
Current edition approved May 1, 2023. Published May 2023. Originally Available from American Society of Mechanical Engineers (ASME), ASME
approved in 1983. Last previous edition approved in 2022 as A815/A815M – 22. International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
DOI: 10.1520/A0815_A0815M-23. www.asme.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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 A815/A815M − 23
2.3 MSS Standards:4 5.2 All classes of fittings shall be heat treated in accordance
MSS SP-43 Standard Practice for Light Weight Stainless with Section 6.
Steel Butt-Welding Fittings
5.3 Fittings ordered as Class WP-S shall be of seamless
MSS SP-79 Socket-Welding Reducer Inserts
construction and shall meet all requirements of Specification
MSS SP-83 Steel Pipe Unions, Socket-Welding and
Threaded A960/A960M.
MSS SP-95 Swage(d) Nipples and Bull Plugs 5.4 Fittings ordered as Class WP-W shall meet the require-
MSS SP-97 Integrally Reinforced Forged Branch Outlet ments of Specification A960/A960M and (1) shall have all
Fittings—Socket Welding, Threaded and Buttwelding welds made by the fitting manufacturer and all pipe welds
Ends made with the addition of filler metal radiographically exam-
2.4 ASME Boiler and Pressure Vessel Codes:3 ined throughout the entire length in accordance with Paragraph
Section VIII Division I UW-51 of Section VIII, Division 1, of the ASME Boiler and
Section IX Pressure Vessel Code; and (2) shall not require radiography of
2.5 ASNT Standard:5 the starting pipe weld if the pipe was welded without the
SNT-TC-1A Recommended Practice for Nondestructive addition of filler metal. In place of radiographic examination,
Testing Personnel Qualification and Certification welds made by the fitting manufacturer may be ultrasonically
examined in accordance with the code requirements stated in
3. Common Requirements and Ordering Information
5.6.
3.1 Material furnished to this specification shall conform to
the requirements of Specification A960/A960M including any 5.5 Fittings ordered as Class WP-WX shall meet the re-
supplementary requirements that are indicated in the purchase quirements of Specification A960/A960M and shall have all
order. Failure to comply with the common requirements of welds, whether made by the fitting manufacturer or the starting
Specification A960/A960M constitutes nonconformance with material manufacturer, radiographically examined throughout
this specification. In case of conflict between this specification their entire length in accordance with Paragraph UW-51 of
and Specification A960/A960M, this specification shall pre- Section VIII, Division I of the ASME Boiler and Pressure
vail. Vessel Code. The radiography of welds for this class of fittings
can be done either prior to or after forming at the option of the
3.2 Specification A960/A960M identifies the ordering infor- manufacturer.
mation that should be complied with when purchasing material
to this specification. 5.6 Fittings ordered as Class WP-WU shall meet the re-
quirements of Specification A960/A960M and shall have all
4. Materials welds, whether made by the fitting manufacturer or the starting
4.1 The material for fittings shall consist of forgings, bars, material manufacturer, ultrasonically examined throughout
plates, or seamless or welded tubular products that conform to their entire length in accordance with Appendix 12 of Section
the chemical requirements in Table 1. VIII, Division 1 of ASME Boiler and Pressure Vessel Code.
4.2 The steel shall be melted by one of the following 5.7 The radiography or ultrasonic examination for this class
processes: of fittings may be done at the option of the manufacturer, either
4.2.1 Electric furnace (with separate degassing and refining prior to or after forming.
optional),
4.2.2 Vacuum furnace, or 5.8 Personnel performing NDE examinations shall be quali-
4.2.3 Electric furnace followed by vacuum or electroslag- fied in accordance with SNT-TC-1A.
consumable remelting. 5.9 Fittings covered in Specification A960/A960M and
4.3 If secondary melting is employed, the heat shall be ordered as CR shall meet the requirements of Specification
defined as all ingots remelted from a primary heat. A960/A960M and do not require nondestructive examination.

5. Manufacture 5.10 All classes of fittings shall have the welders, welding
operators, and welding procedures qualified under the provi-
5.1 Forming—Forging or shaping operations may be per- sions of Section IX of the ASME Boiler and Pressure Vessel
formed by hammering, pressing, piercing, extruding, upsetting, Code except that starting pipe welds made without the addition
rolling, bending, fusion welding, machining or by combination of filler metal do not require such qualification.
of two or more of these operations. The forming procedure
shall be so applied that it will not produce surface discontinui- 5.11 All joints welded with filler metal shall be finished in
ties deeper than 5 % of the specified nominal thickness of the accordance with the requirements of Paragraph UW-35 (a) of
fitting. Section VIII, Division 1, of the ASME Boiler and Pressure
Vessel Code.
4
Available from Manufacturers Standardization Society of the Valve and Fittings 5.12 Fittings machined from bar shall be restricted to NPS 4
Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss- or smaller.
hq.com.
5
Available from American Society for Nondestructive Testing (ASNT), P.O. Box 5.12.1 All caps machined from bar shall be examined by
28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org. liquid penetrant in accordance with Practice E165/E165M.

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 A815/A815M − 23
TABLE 1 Chemical Requirements

NOTE 1—Where an ellipsis (. . .) appears in this table, there is no requirement.

Composition, %
GradeA
Phos-
Grade Grade Carbon, Manga- Sulfur, Silicon, Chrom- Molyb- Ni-
UNS phorus, NickelB CopperB Titanium Other
WP CR max neseB max max ium denum trogenB
max
Ferritic Steels
WP27 CR27 S44627 0.010 0.75 0.020 0.020 0.40 0.50 25.0– 0.75– 0.20 0.015 ... NbD
27.5 1.50 0.05–0.20

WP33 CR33 S44626 0.06 0.75 0.040 0.020 0.75 0.50 25.0– 0.75– 0.20 0.040 0.20–1.00 ...
27.0 1.50 (7×(C+N)) min

WP429 CR429 S42900 0.12 1.0 0.040 0.030 0.75 0.50 14.0– ... ... ... ... ...
16.0

WP430 CR430 S43000 0.12 1.00 0.040 0.030 1.00 0.50 16.0– ... ... ... ... ...
18.0

WP430TI CR430Ti S43036 0.10 1.00 0.040 0.030 1.00 0.75 16.0– ... ... ... (5×C) min 0.75 ...
19.5 max

WP446 CR446 S44600 0.20 1.50 0.040 0.030 0.75 0.50 23.0– ... ... 0.25 ... ...
27.0
Ferritic/Austenitic Steels
WPS31803 CRS31803 S31803 0.030 2.00 0.030 0.020 1.0 4.5– 21.0– 2.5– ... 0.08– ... ...
6.5 23.0 3.5 0.20
WPS32101 CRS32101 S32101 0.040 4.0– 0.040 0.030 1.00 1.35– 21.0– 0.10– 0.10– 0.20– ... ...
6.0 1.70 22.0 0.80 0.80 0.25
WPS32202 CRS32202 S32202 0.030 2.00 0.040 0.010 1.00 1.00– 21.5– 0.45 ... 0.18– ... ...
2.80 24.0 0.26
WPS32750 CRS32750 S32750 0.030 1.20 0.035 0.020 0.8 6.0– 24.0– 3.0– 0.5 0.24– ... ...
8.0 26.0 5.0 0.32
WPS32950 CRS32950 S32950 0.030 2.00 0.035 0.010 0.60 3.5– 26.0– 1.00– ... 0.15– ... ...
5.2 29.0 2.50 0.35
WPS32760 CRS32760 S32760 0.030 1.00 0.030 0.010 1.00 6.0– 24.0– 3.0– 0.50– 0.20– ... W
8.0 26.0C 4.0C 1.00 0.30C 0.50–1.00

WPS39274 CRS39274† S39274 0.030 1.00 0.030 0.020 0.80 6.0– 24.0– 2.50– 0.20– 0.24– ... W
8.0 26.0 3.50C 0.80 0.32 1.50–2.50
WPS32550 CRS32550 S32550 0.04 1.50 0.040 0.030 1.00 4.5– 24.0– 2.9– 1.50– 0.10– ... ...
6.5 27.0 3.9 2.50 0.25
WPS32205 CRS32205 S32205 0.030 2.00 0.030 0.020 1.00 4.5– 22.0– 3.0– ... 0.14– ... ...
6.5 23.0 3.5 0.20
Martensitic Steels
WP410 CR410 S41000 0.15 1.00 0.040 0.030 1.00 0.50 11.5– ... ... ... ... ...
max 13.5
WPS41008 CRS41008 S41008 0.08 1.00 0.040 0.030 1.00 0.60 11.5– ... ... ... ... ...
13.5
WPS41500 CRS41500 S41500 0.05 0.50– 0.030 0.030 0.60 3.5– 11.5– 0.50– ... ... ... W
1.00 5.5 14.0 1.00 0.50–1.00

A
Naming system developed and applied by ASTM International.
B
Maximum unless otherwise indicated.
C
% Cr + 3.3 × % Mo + 16 × % N = 40 min.
D
Niobium and columbium are interchangeable names for the same element and both names are acceptable for use in A01.22 specifications.

5.13 Weld buildup is permitted to dimensionally correct 5.13.4 Repair of areas in the weld is permitted, but 5.13.1,
unfilled areas produced during forming of stub ends. Radio- 5.13.2, and 5.13.3 must be repeated.
graphic examination of the weld buildup shall not be required
5.14 Stub ends may be produced with the entire lap added as
provided that all of the following steps are adhered to:
5.13.1 The weld procedure and welders or welding opera- weld metal to a straight pipe section provided the welding
tors meet the requirements of 5.10, satisfies the requirements of 5.10 for qualifications and Section
5.13.2 Heat-treatment is performed after welding and prior 6 for post weld heat treatment.
to machining, 5.14.1 Class WP-W—Radiographic inspection of the weld is
5.13.3 All weld surfaces are liquid penetrant examined in required (see 5.4).
accordance with Appendix 8 of Section VIII, Division 1 of the 5.14.2 Class WP-WX—Radiographic inspection of all welds
ASME Boiler and Pressure Vessel Code, and is required (see 5.5).

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 A815/A815M − 23
5.14.3 Class WP-WU—Ultrasonic inspection of all welds is treated as required by Table 2 for the particular grade, is
required (see 5.6). required, provided material representative of the fittings, in-
5.14.4 Class CR—Nondestructive examination is not re- cluding base metal, weld metal, and heat affected zone, passes
quired (see 5.9). a Test Methods A923 Method B or C (See Note 1) corrosion
5.15 Stub ends may be produced with the entire lap added evaluation per heat. Each fitting supplied under this require-
by the welding of a ring, made from plate or bar of the same ment shall be stenciled with the suffix HT-O.
alloy grade and composition, to the outside of a straight section 6.1.2 For materials not listed in Table 3 of Test Methods
of pipe, provided the weld is double welded, is a full A923, the HT-O provision does not apply.
penetration joint, satisfies the requirements of 5.10 for quali- NOTE 1—The Test Methods A923 test method (B or C) is at the
fications and Section 6 for post weld heat treatment. manufacturer’s option, unless otherwise specified by the purchaser.
5.15.1 Class WP-W—Radiographic inspection of all welds, 6.2 All fittings machined directly from forgings or bars (see
made with the addition of filler metal is required (see 5.4). 5.12), previously heat treated in accordance with the require-
5.15.2 Class WP-WX—Radiographic inspection of all ments specified in Table 2, need not be reheat treated.
welds, made with or without the addition of filler metal, is
required (see 5.5). 7. Chemical Composition
5.15.3 Class WP-WU—Ultrasonic inspection of all welds,
made with or without the addition of filler metal, is required 7.1 The chemical composition of each cast or heat shall be
(see 5.6). determined and shall conform to the requirements of the
5.15.4 Class CR—Nondestructive examination is not re- chemical composition for the respective grades of materials
quired (see 5.9). listed in Table 1. Methods and practices relating to chemical
analyses required by this specification shall be in accordance
6. Heat Treatment with Methods, Practices, and Definitions A751. Product analy-
sis tolerances in accordance with Specification A960/A960M
6.1 Unless otherwise stated herein, heat treatment shall be
are applicable.
performed after welding and in accordance with the require-
ments of Table 2. 7.2 Except as listed below, in fittings of welded
6.1.1 No final heat treatment of welded fittings (HT-O) construction, the composition of the deposited weld shall
fabricated from ferritic/austenitic plate that has been heat conform to the same requirements as the base metal.

TABLE 2 Heat Treatment

Stainless Steel All WP and CR Grades Temperature Cooling Tempering
Temperature
Ferritic All $ 1200 °F [650 °C] As appropriate for grade Not specified
Ferritic/Austenitic S31803 1870–2010 °F Water quench or Not required
[1020–1100 °C] rapidly cooled by
other means
S32101 1870 °F [1020 °C] min Water quench or Not required
rapidly cooled by
other means
S32202 1870–1975 °F Water quench or Not required
[1020–1080 °C] rapidly cooled by
other means
S32205 1870–2010 °F Water quench Not required
[1020–1100 °C]
S32750 1880–2060 °F Water quench or Not required
[1025–1125 °C] rapidly cooled by
other means
S32760 2010–2085 °F Water quench or Not required
[1100–1140 °C] rapidly cooled by
other means
S39274 1920–2060 °F Water quench or Not required
[1050–1125 °C] rapidly cooled by
other means
S32550 1950–2060 °FA Water quench Not required
[1065–1125 °C]A
S32950 Not specified Not specified Not required
Martensitic S41000 $ 1200°F [650°C] Not specified Not specified
S41008 > 1200°F [650°C] In still air Not specified
as appropriate
for grade
S41500 $ 1750 °F [955 °C] Air cool to # 200 °F 1050–1150 °F
[95 °C] prior to any [565–620 °C]
optional intermediate
temper and prior to
final temper.
A
The higher temperature (2000 to 2060 °F [1095 to 1125 °C]) PWHT is best used on welded product—the lower temperature PWHT (1950 to 2010 °F [1065 to 1100 °C])
is best used on wrought or seamless products only.

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 A815/A815M − 23
7.2.1 Welds on S32950 base metal shall be made with 9. Hardness Requirements
nominal 26 % Cr, 8 % Ni, 2 % Mo weld metal. 9.1 Fittings shall not exceed the maximum hardness shown
7.2.2 Welds on S31803 and S32205 base metals shall in Table 3.
conform to the same requirements as the base metal or shall be
made with nominal 22 % Cr, 9 % Ni, 3 % Mo or 25 % Cr, 9 % 10. Dimensions
Ni, 4 % Mo weld metal.
10.1 The sizes, shapes, and dimensions of the fittings
7.2.3 Welds on S32202 base metal shall be made with
covered by ASME B16.9, ASME B16.11, MSS SP-43, MSS
nominal 22 % Cr, 9 % Ni, 3 % Mo weld metal.
SP-79, MSS SP-83, MSS SP-95, or MSS SP-97 shall be as
7.2.4 Welds on S32750 and S32760 base metals may be
specified in those standards.
made with nominal 25 % Cr, 9 % Ni, 4 % Mo weld metal.
10.2 Fittings of size or shape differing from these standards,
8. Tensile Requirements but meeting all other requirements of this specification, may be
8.1 The tensile properties of the fitting material shall con- furnished in accordance with Supplementary Requirement S58
form to the requirements of Table 3. The testing and reporting of Specification A960/A960M.
shall be performed in accordance with Specification A960/
A960M. 11. Surface Finish, Appearance, and Corrosion
Protection
8.2 The fittings manufacturer shall perform a tensile test on
material representative of the finished fitting. Records of the 11.1 In addition to the requirements of this section, the
tensile test made on the starting material may be certification requirements of Specification A960/A960M apply.
that the material of hot-finished fittings meets the tensile 11.2 Fittings supplied under this specification shall be
requirements of this specification provided the heat treatments examined visually. Selected typical surface discontinuities
are the same. For purposes of tensile, yield and elongation shall be explored for depth. The fittings shall be free from
requirements listed in Table 3, the tensile specimen shall surface discontinuities that penetrate more than 5 % of the
consist of base metal only. If the purchaser requires results, specified nominal wall thickness, except as defined in 11.4 and
involving the weld, in addition to the base metal only results, 11.5, and shall have a workmanlike finish.
then the S2 supplemental requirement of this specification shall 11.3 Surface discontinuities deeper than 5 % of the specified
be specified on the purchase order. When S2 is specified, the nominal wall thickness, except as defined in 11.4 and 11.5,
weld metal must meet only the minimum ultimate tensile shall be removed by the manufacturer by machining or
strength of Table 3. grinding to sound metal, and the repaired areas shall be well
TABLE 3 Tensile and Hardness Requirements
faired. The wall thickness at all points shall be at least 871⁄2 %
of the specified nominal wall thickness, and the diameters at all
Elongation
Yield
Tensile in 2 in. points shall be within the specified limits.
All WP and CR Strength, HBW
Strength,A [50 mm]
11.4 Surface checks (fish scale) deeper than 1⁄64 in. [0.4 mm]
Grades min, ksi [MPa] max
or 4D,
ksi [MPa] shall be removed.
min, %
Ferritic Steels: 11.5 Mechanical marks deeper than 1⁄16 in. [1.6 mm] shall be
S44627 40 [275] 65 [450]– 20.0 190
90 [620] removed.
S44626 45 [310] 68 [470]– 20.0 241 11.6 When the removal of a surface discontinuity reduces
93 [640]
S42900 35 [240] 60 [415]– 20.0 190 the wall thickness below 871⁄2 % of the specified nominal wall
85 [585] thickness at any point, the fitting shall be subject to rejection or
S43000 35 [240] 65 [450]– 20.0 190
90 [620]
to repair as provided in 12.1.
S43036 35 [240] 60 [415]– 20.0 190
85 [585] 12. Repair by Welding
S44600 40 [275] 70 [485]– 18.0 207
95 [655] 12.1 Repair by Welding:
Ferritic/Austenitic Steels: 12.1.1 Repair welding, of the base metal by the
S31803 65 [450] 90 [620] 20.0 290 manufacturer, is permissible for fittings made to the dimen-
S32101 65 [450] 94 [650] 30.0 290
S32202 65 [450] 94 [650] 30.0 290 sional standards listed in 10.1 or for other standard fittings
S32205 65 [450] 95 [655] 20.0 290 made for stock. Prior approval of the purchaser is required to
S32750 80 [550] 116 [800] 15.0 310 repair special fittings made to the purchaser’s requirements.
S32760 80 [550] 109 [750] 25.0 270
S32950 70 [485] 100 [690] 15.0 290 Repair by welding shall neither exceed 10 % of the outside
S39274 80 [550] 116 [800] 15.0 310 surface area of the fitting nor 331⁄3 % of the nominal wall
S32550 80 [550] 110 [760] 15.0 302
thickness.
Martensitic Steels:
S41000 30 [205] 70 [485]– 20.0 207 12.1.2 The welding procedure and welders shall be qualified
95 [655] in accordance with Specification A960/A960M.
S41008 30[205] 60[415] 22.0 183
S41500 90 [620] 110 [760]– 15.0 295
12.1.3 The alloy content (carbon, chromium, nickel,
135 [930] molybdenum, niobium, and titanium) of the deposited weld
A
Minimum unless otherwise indicated. metal shall be within the same percentage range as permitted
for the base metal. (Warning—When selecting the filler metal

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 A815/A815M − 23
and welding procedure, consideration should be given to their Specification A960/A960M as well as include the following
effect on corrosion resistance in service.) information specific to this specification:
12.1.4 Surface discontinuities deeper than 5 % of the speci- 16.1.1 Chemical analysis results for all starting materials,
fied nominal wall thickness shall be removed by mechanical Section 7, (Table 1), reported results shall be to the same
means or thermal cutting or gouging methods. Cavities pre- number of significant figures as the limits specified in Table 1
pared for welding shall be examined by the liquid penetrant for that element,
method of Practice E165/E165M. No cracks shall be permitted 16.1.2 Starting material; plate, bar, pipe (specify welded or
in the prepared cavities. seamless), forging,
12.1.5 The weld repair shall be permanently identified with 16.1.3 Tensile property results, Section 8, (Table 3), report
the welder’s stamp or symbol in accordance with Specification the yield strength and tensile strength in ksi [MPa] and
A960/A960M. elongation in percent,
12.1.6 Weld repair area(s) shall be blended uniformly to the 16.1.4 Seamless or welded construction,
base metal and shall be examined by liquid penetrant in 16.1.5 For construction with filler metal added, weld metal
accordance with Practice E165/E165M. No cracks shall be specification number,
permitted in the weld or surrounding 1⁄2 in. [13 mm] of base 16.1.6 For welded fittings, construction method, weld
metal. process, and procedure specification number,
12.1.7 After weld repair, material shall be heat treated in 16.1.7 Heat treatment type, Section 6 (Table 2),
accordance with Section 6. 16.1.8 Hardness results, Section 9 (Table 3),
12.2 The fittings shall be cleaned free of scale. 16.1.9 Results of all nondestructive examinations, and
16.1.10 Any supplementary testing required by the purchase
13. Hydrostatic Tests order.
13.1 Hydrostatic testing is not required by this specification. 17. Product Marking
13.2 Each fitting of Class WP shall be capable of withstand- 17.1 In addition to marking requirements of Specification
ing without failure, leakage, or impairment of serviceability, a A960/A960M, the following additional marking requirements
test pressure equal to that prescribed for the specified matching shall apply:
pipe or equivalent material. 17.1.1 Marking paint or ink shall not contain harmful
13.3 Each fitting of Class CR, except tees covered in 13.3.1, amounts of chlorides, metals, or metallic salt, such as zinc or
shall be capable of withstanding without failure, leakage, or copper, that cause corrosive attack on heating. On wall
impairment of serviceability, a test pressure based on the thicknesses thinner than 0.083 in. [2.1 mm], no metal impres-
ratings in MSS SP-43. sion stamps shall be used. Vibrating pencil marking is accept-
13.3.1 Class CR tees fabricated using intersection welds able.
shall be capable of passing a hydrostatic test based on 70 % of 17.1.2 Threaded or socket-welding fittings shall be marked
the ratings in MSS SP-43. with the pressure class. Plugs and bushings furnished to ASME
B16.11 requirements are not required to be marked. The class
14. Rejection S marking need not be added to the material grade for threaded
14.1 Unless otherwise specified, any rejection based on tests or socket-welded fittings.
by the purchaser shall be reported to the manufacturer within 17.1.3 When agreed upon between the purchaser and
30 working days from the receipt of samples or test reports by producer, and specified in the order, the markings shall be
the purchaser. painted or stenciled on the fitting or stamped on a metal or
14.2 Each fitting that develops surface discontinuities plastic tag which shall be securely attached to the fitting.
deeper than 5 % of the specified nominal wall thickness in shop 17.2 Bar Coding—In addition to the requirements in 17.1,
working or application operations may be rejected and the bar coding is acceptable as a supplemental identification
manufacturer so notified. method. The purchaser may specify in the order a specific bar
coding system to be used. The bar coding system, if applied at
15. Rehearing the discretion of the supplier, should be consistent with one of
15.1 Test samples that represent fittings rejected by the the published industry standards for bar coding. If used on
purchaser shall be preserved for four weeks from the date of small fittings, the bar code may be applied to the box or a
the rejection report. In case of dissatisfaction with the test substantially applied tag.
results, the manufacturer may make claim for a rehearing
within the period that the samples are preserved. 18. Keywords
18.1 corrosive service applications; ferritic/austenitic stain-
16. Certification less steel; ferritic stainless steel; martensitic stainless steel;
16.1 Test reports are required for all fittings covered by this pipe fittings-steel; piping applications; pressure containing
specification. Each test report shall meet the requirements in parts; stainless steel fittings

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 A815/A815M − 23
SUPPLEMENTARY REQUIREMENTS

One or more of the supplementary requirements described below may be included in the purchaser’s
inquiry or in the order or contract. When so included, a supplementary requirement shall have the
same force as if it were in the body of the specification. Supplementary requirement details not fully
described shall be agreed upon between the purchaser and the supplier.

S1. Product Analysis (Note S1.1) S5. Photomicrographs

S1.1 A product analysis shall be made for each heat of base S5.1 Photomicrographs at 100 diameters shall be made for
metal and, if of welded construction, from each lot number of information only of the actual base metal structure from one
welding material of the fittings offered for delivery and shall fitting as furnished in each lot. The photomicrographs shall be
conform to the requirements specified in Section 7. identified as to fitting size, wall thickness, lot identification,
NOTE S1.1—If the results of any of the tests specified in Supplementary
Requirements S1, S2, or S3 do not conform to requirements, retests may and heat. The definition of “lot” shall be as specified by the
be made at the manufacturer’s expense on additional fittings or represen- purchaser.
tative test pieces of double the original number from the same heat or lot
as defined in Supplementary Requirements S1, S2, or S3, each of which S6. Surface Finish
shall conform to the requirements specified.
S6.1 Machined surfaces shall have a maximum roughness
S2. Tension Test (Note S1.1)
of 250 RMS (root-mean-square) or 6.3 µin. AA (arithmetical
S2.1 One tension test shall be made on one fitting or average). All other surfaces shall be suitable for ultrasonic
representative test piece (Note S2.1) per lot (Note S2.2) of testing.
fittings. If the fittings are of welded construction, the tension
specimen shall include the weld and be prepared so that the S7. Liquid Penetrant Test
weld is at the midlength of the specimen.
NOTE S2.1—Where the test specimen for the tension or intergranular S7.1 All surfaces shall be liquid penetrant tested. The
corrosion bend test cannot be taken from a fitting due to size limitations, method shall be in accordance with Practice E165/E165M.
a representative test piece shall be obtained. The test piece shall be from
the same lot it represents and shall have approximately the same amount
of working. In addition, these pieces representing fittings manufactured S8. ASME Section III or Section VIII, Division 1 Construc-
from bars, plate, or forgings shall have a cross section equal to the greatest tion
cross section of the fitting, and test pieces representing fittings manufac-
tured from tubular products shall have a cross section approximately the S8.1 Products welded with filler metal furnished under this
same as that of the finished product. The test piece for fittings of welded specification that are intended for application under the rules of
construction shall be prepared to the same weld procedures and from the Section III or Section VIII, Division 1 of the ASME Boiler and
same heats of materials as the fittings it represents.
NOTE S2.2—A lot shall consist of all fittings of the same type, size, and Pressure Vessel Code shall be manufactured by holders of the
wall thickness, manufactured from one heat of material (and, if fabrication appropriate ASME Certificate of Authorization and Certifica-
welding is performed using one lot number of electrode or one heat of tion Mark. The product is subject to all applicable requirements
weld wire), and heat treated using the same heat treat cycle in either a
of Section III or Section VIII, Division 1, including welding,
continuous or batch-type furnace controlled within a range of 50 °F [28
°C] and equipped with recording pyrometers so that complete records of heat treatment, nondestructive examination, authorized inspec-
heat treatment are available. tion at the point of manufacture, and application of the
Certification Mark.
S3. Intergranular Corrosion Bend Test (Note S1.1)
S8.2 The applicable ASME Partial Data Report form,
S3.1 An intergranular corrosion bend test shall be made on signed by an Authorized Nuclear Inspector or Authorized
one fitting or representative test piece (Note S2.1) per lot (Note Inspector, and a material test report shall be furnished for each
S2.2) of fittings. If the fittings are of welded construction, the lot of pipe fittings.
bend specimen shall include the weld and be prepared so that
the weld is at the midlength location of the specimen. Speci- S8.3 The material used to fabricate the pipe fittings shall
mens containing a weld shall be bent so that the location of conform to the applicable SA specification in ASME Boiler and
weld is at the point of maximum bend. The method of testing Pressure Vessel Code, Section II. The welded joints shall be
shall be in accordance with Practices A262 or Practices A763, full penetration butt welds as obtained by double welding or by
as applicable. other means that will obtain the same quality of deposited weld
metal on the inside and outside. Welds using metal backing
S4. Ultrasonic Test strips that remain in place are prohibited.
S4.1 Each fitting or the raw material from which each fitting S8.4 Each piece of pipe fitting shall be so marked as to
is made shall be ultrasonically tested to determine its sound- identify each such piece of pipe fitting with the lot and the
ness. The method, where applicable, shall be in accordance material test report.
with Practice A388/A388M. Acceptance limits shall be speci-
fied by the purchaser.

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 A815/A815M − 23

SUMMARY OF CHANGES

Committee A01 has identified the location of selected changes to this standard since the last issue
(A815/A815M – 22) that may impact the use of this standard. (Approved May 1, 2023.)

(1) Revised 5.13 to encompass all types of forming processes.

Committee A01 has identified the location of selected changes to this standard since the last issue
(A815/A815M – 21) that may impact the use of this standard. (Approved Nov. 1, 2022.)

(1) Added Supplementary Requirement S8 requirements for

welded with filler metal fittings for ASME Section III or
Section VIII, Division 1 use.

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