ASTM A815/A815M-00
(Specification)Standard Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
Standard Specification for Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
SCOPE
1.1 This specification covers two general classes, WP and CR, of wrought ferritic, ferritic/austenitic, and martensitic stainless steel fittings of seamless and welded construction covered by the latest revision of Specification A 960. Fittings differing from these standards may be furnished in accordance with Supplementary Requirement S8.
1.1.1 Class WP fittings are subdivided into four subclasses: Classes WP-S, WP-W, WP-WX, and WP-WU. They are manufactured to the requirements of Specification A960, and they shall have pressure ratings compatible with 12.2 . Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture (marked with class symbol WP-S); Class WP-W fittings are those which contain welds where the fitting fabrication or construction welds have been radiographed (marked with class symbol WP-W); and Class WP-WX fittings are those which contain welds where all welds have been radiographed (marked with class symbol WP-WX); and Class WP-WU fittings are those which contain welds where all welds have been ultrasonically tested (marked with class symbol WP-WU).
1.1.2 Class CR fittings are those manufactured to the requirements of MSS SP-43, and they shall have pressure ratings compatible with 12.3.
1.2 This specification does not apply to cast fittings.
1.3 Optional supplementary requirements are provided. When desired, one or more of these may be specified in the order.
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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 815/A 815M – 00 An American National Standard
Standard Specification for
Wrought Ferritic, Ferritic/Austenitic, and Martensitic
Stainless Steel Piping Fittings
This standard is issued under the fixed designation A 815/A 815M; 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 system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
1.1 This specification covers two general classes, WP and
two systems may result in nonconformance with the specifi-
CR, of wrought ferritic, ferritic/austenitic, and martensitic
cation.
stainless steel fittings of seamless and welded construction
covered by the latest revision of ANSI B16.9, ANSI B16.11,
2. Referenced Documents
ANSI B16.28, MSS Standard Practice SP-79, and MSS Stan-
2.1 ASTM Standards:
dard Practice SP-43. Fittings differing from these standards
A 262 Practices for Detecting Susceptibility to Intergranu-
may be furnished in accordance with Supplementary Require-
lar Attack in Austenitic Stainless Steels
ment S8.
A 370 Test Methods and Definitions for Mechanical Testing
1.1.1 Class WP fittings are subdivided into four subclasses:
of Steel Products
Classes WP-S, WP-W, WP-WX, and WP-WU. They are
A 388/A388M Practice for Ultrasonic Examination of
manufactured to the requirements of ANSI B16.9, B16.11,
Heavy Steel Forgings
B16.28, or MSS Standard Practice SP-79, and they shall have
A 751 Test Methods, Practices, and Terminology for
pressure ratings compatible with 12.2. Class WP-S fittings are
Chemical Analysis of Steel Products
those manufactured from seamless product by a seamless
A 763 Practices for Detecting Susceptibility to Intergranu-
method of manufacture (marked with class symbol WP-S);
lar Attack in Ferritic Stainless Steels
Class WP-W fittings are those which contain welds where the
E 165 Test Method for Liquid Penetrant Examination
fitting fabrication or construction welds have been radio-
2.2 ASME Standards:
graphed (marked with class symbol WP-W); and Class
B16.9 Wrought Steel Butt-Welding Fittings
WP-WX fittings are those which contain welds where all welds
B16.11 Forged Steel Fittings, Socket-Welding and Threaded
have been radiographed (marked with class symbol WP-WX);
B16.28 Wrought Steel Butt-Welding Short Radius Elbows
and Class WP-WU fittings are those which contain welds
and Returns
where all welds have been ultrasonically tested (marked with
2.3 MSS Standards:
class symbol WP-WU).
SP-25 Standard Marking System for Valves, Fittings,
1.1.2 Class CR fittings are those manufactured to the
Flanges, and Unions
requirements of MSS SP-43, and they shall have pressure
SP-43 Standard Practice for Light Weight Stainless Steel
ratings compatible with 12.3.
Butt-Welding Fittings
1.2 This specification does not apply to cast fittings.
SP-79 Socket-Welding Reducer Inserts
1.3 Optional supplementary requirements are provided.
2.4 ASME Boiler and Pressure Vessel Codes:
When desired, one or more of these may be specified in the
Section VIII Division I, Pressure Vessels
order.
Section IX Welding Qualifications
1.4 This specification is expressed in both inch-pound units
2.5 ASNT Standard:
and in SI units. However, unless the order specifies the
SNT-TC-1A(1984) Recommended Practice for Nondestruc-
applicable “M” specification designation [SI units], the mate-
tive Testing Personnel Qualification and Certification
rial 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
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 01.05.
Annual Book of ASTM Standards, Vol 03.03.
1 5
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Available from American Society of Mechanical Engineers, Three Park
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee Avenue, New York, NY 10016-5990.
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Available from Manufacturers’ Standardization Society of the Valve and
Materials for Piping and Special Purpose Applications. Fittings Industry, 127 Park St., N.E., Vienna, VA 22180.
Current edition approved Mar. 10, 2000. Published May 2000. Originally Available from American Society for Nondestructive Testing, 4153 Arlingate
published as A 815 – 83. Last previous edition A 815/A 815M – 99. Plaza, P.O. Box 28518, Columbus, OH 43228-0518.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
A 815/A 815M
3. Ordering Information 4. Materials
3.1 It is the purchaser’s responsibility to specify in the
4.1 The material for fittings shall consist of forgings, bars,
purchase order all ordering information necessary needed to
plates, or seamless or welded tubular products that conform to
purchase the needed material. Examples of such information
the chemical requirements in Table 1.
include but are not limited to the following:
4.2 The steel shall be melted by one of the following
3.1.1 Quantity, number of fittings of each kind,
processes:
3.1.2 Description of fitting and nominal dimension (stan-
4.2.1 Electric furnace (with separate degassing and refining
dard or special),
optional),
3.1.3 Steel composition by grade and Class designation,
4.2.2 Vacuum furnace, or
3.1.4 Class WP or CR shall be specified. Class WP fittings
4.2.3 Electric furnace followed by vacuum or electroslag-
may be further defined by specifying Class WP-S, WP-W, or
consumable remelting.
WP-WX,
4.3 If secondary melting is employed, the heat shall be
3.1.4.1 Unless Class WP-S, WP-W, or WP-WX is specified
defined as all ingots remelted from a primary heat.
by the purchaser, any may be furnished at the option of the
supplier,
5. Manufacture
3.1.4.2 Class CR fittings shall not be substituted for fittings
5.1 Forming—Forging or shaping operations may be per-
ordered to Class WP, but Class WP may be substituted for
Class CR, and formed by hammering, pressing, piercing, extruding, upsetting,
rolling, bending, fusion welding, machining or by combination
3.1.5 Supplementary requirements, if any.
3.1.6 Additional requirements (see 4.1, 13.2, and 16.1). of two or more of these operations. The forming procedure
TABLE 1 Chemical Requirements
NOTE 1—Where an ellipsis (. . .) appears in this table, there is no requirement.
Composition, %
C, Mn, P, S, Si, Cu,
A
Grade UNS Ni Cr Mo N Ti Other
max max max max max max
Ferritic Steels
WP27 S44627 0.010 0.75 0.020 0.020 0.40 0.50 25.0– 0.75– 0.20 0.015 . Cb
27.5 1.50 max 0.05–0.20
WP33 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 max (73(C+N)) min
WP429 S42900 0.12 1.0 0.040 0.030 0.75 0.50 14.0– . . . . .
16.0
WP430 S43000 0.12 1.00 0.040 0.030 1.00 0.50 16.0– . . . . .
18.0
WP430TI S43036 0.10 1.00 0.040 0.030 1.00 0.75 16.0– . . . (53C) min 0.75 .
19.5 max
WP446 S44600 0.20 1.50 0.040 0.030 0.75 0.50 23.0– . . . . . . 0.25 . . . . . .
27.0
Ferritic/Austenitic Steels
S31803 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
S32750 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
S32950 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
S32760 S32760 0.030 1.00 0.030 0.010 1.00 6.0– 24.0– 3.0– 0.50– 0.20– . W
B B B
8.0 26.0 4.0 1.00 0.30 0.50–1.00
S39274 S32974 0.030 1.00 0.030 0.020 0.80 6.0– 24.0– 2.50– 0.20– 0.24– . W
B
8.0 26.0 3.50 0.80 0.32 1.50–2.50
S32550 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
S32205 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 S41000 0.15 1.00 0.040 0.030 1.00 0.50 11.5– . . . . .
max 13.5
UNS S41500 0.05 0.50– 0.030 0.030 0.60 3.5– 11.5– 0.50– . . . W
S41500 1.00 5.5 14.0 1.00 0.50–1.00
A
Maximun unless otherwise indicated.
B
%Cr+3.3 3 %Mo+16 3 %N=40 min.
A 815/A 815M
shall be so applied that it will not produce surface discontinui- required provided that all of the following steps are adhered to:
ties deeper than 5 % of the specified nominal thickness of the 5.13.1 The weld procedure and welders or welding opera-
fitting. tors meet the requirements of 5.10,
5.13.2 Heat-treatment is performed after welding and prior
5.2 All classes of fittings shall be heat treated in accordance
to machining,
with Section 6.
5.13.3 All weld surfaces are liquid penetrant examined in
5.3 Fittings ordered as Class WP-S shall be of seamless
accordance with Appendix 8 of Section VIII, Division 1 of the
construction and shall meet all requirements of ANSI B16.9,
ASME Boiler and Pressure Vessel Code, and
B16.11, B16 .28, or MSS SP-79.
5.13.4 Repair of areas in the weld is permitted, but 5.13.1,
5.4 Fittings ordered as Class WP-W shall meet the require-
5.13.2, and 5.13.3 must be repeated.
ments of ANSI B16.9 or B16.28 and (1) shall have all welds
5.13.5 Fittings shall be marked with the symbol WBU
made by the fitting manufacturer and all pipe welds made with
following the alloy designation and classification (for example,
the addition of filler metal radiographically examined through-
WP430/WBU, WPS31803/WPU, WP410/WBU, etc.).
out the entire length in accordance with Paragraph UW-51 of
5.14 Stub ends may be produced with the entire lap added as
Section VIII, Division 1, of the ASME Boiler and Pressure
weld metal to a straight pipe section provided the welding
Vessel Code; and (2) shall not require radiography of the
satisfies the requirements of 5.8 for qualifications and 6.4 for
starting pipe weld if the pipe was welded without the addition
post weld heat treatment.
of filler metal. In place of radiographic examination, welds
5.14.1 Class WP-W—Radiographic inspection of the weld
made by the fitting manufacturer may be ultrasonically exam-
is required (see 5.4).
ined in accordance with the code requirements stated in 5.6.
5.14.2 Class WP-WX—Radiographic inspection of all welds
5.5 Fittings ordered as Class WP-WX shall meet the re-
is required (see 5.5).
quirements of ANSI B16.9 or B16.28 and shall have all welds,
5.14.3 Class WP-WU—Ultrasonic inspection of all welds is
whether made by the fitting manufacturer or the starting
required (see 5.6).
material manufacturer, radiographically examined throughout
5.14.4 Class CR—Nondestructive examination is not re-
their entire length in accordance with Paragraph UW-51 of
quired (see 5.9).
Section VIII, Division I of the ASME Boiler and Pressure
Vessel Code. The radiography of welds for this class of fittings
6. Heat Treatment
can be done either prior to or after forming at the option of the
6.1 Ferritic Grades—As a final heat treatment, the ferritic
manufacturer.
fittings shall be reheated to a temperature of 1200°F [650°C] or
5.6 Fittings ordered as Class WP-WU shall meet the re-
higher, and cooled (as appropriate for the grade) to meet the
quirements of ANSI B16.9 or B16.28 and shall have all welds,
requirements of this specification.
whether made by the fitting manufacturer or the starting
6.2 Ferritic/Austenitic:
material manufacturer, ultrasonically examined throughout
6.2.1 As a final heat treatment, the ferritic/austenitic grade
their entire length in accordance with Appendix 12 of Section
UNS S31803, shall be reheated to a temperature of 1870° to
VIII, Division 1 of ASME Boiler and Pressure Vessel Code.
2010°F [1020° to 1100°C], with subsequent quenching in
5.7 The radiography or ultrasonic examination for this class
water or rapidly cooling by other means.
of fittings may be done at the option of the manufacturer, either
6.2.2 As a final heat treatment, the ferritic-austenitic grade
prior to or after forming.
INS 32205, shall be reheated to a temperature of 1870 to
5.8 Personnel performing NDE examinations shall be quali-
2010°F [1020 to 1100°C], with subsequent quenching in water.
fied in accordance with SNT-TC-1A.
6.2.3 As a final heat treatment, the ferritic/austenitic grade
5.9 Fittings covered in MSS SP-43 and ordered as CR shall
UNS S32750, shall be reheated to a temperature of 1920 to
meet the requirements of MSS SP-43 and do not require
2060°F [1025 to 1125°C], with subsequent quenching in water
nondestructive examination.
or rapidly cooling by other means.
5.10 All classes of fittings shall have the welders, welding
6.2.4 As a final heat treatment, the ferritic/austenitic grade
operators, and welded procedures qualified under the provi-
UNS S32760, shall be reheated in the temperature range of
sions of Section IX of the ASME Boiler and Pressure Vessel
2010 to 2085°F [1100 to 1140°C] for an appropriate time, with
Code except that starting pipe welds made without the addition
subsequent quenching in water or rapidly cooling by other
of filler metal do not require such qualification.
means.
5.11 All joints welded with filler metal shall be finished in
6.2.5 As a final heat treatment, the ferritic/austenitic grade
accordance with the requirements of Paragraph UW-35 (a) of
UNS S39274, shall be reheated to a temperature of 1920 to
Section VIII, Division 1, of the ASME Boiler and Pressure
2060°F [1025 to 1125°C], with subsequent quenching in water
Vessel Code.
or rapidly cooling by other means. UNS S32550 shall be
5.12 Fittings machined from bar shall be restricted to NPS 4
annealed at 1950–1975°F [1065–1080°C], and water
or smaller.
quenched.
5.12.1 All caps machined from bar shall be examined by
6.3 Martensitic—As a final heat treatment, the Martensitic
liquid penetrant in accordance with Practice E 165. Grade UNS S41500 shall be reheated to a temperature of
5.13 Weld buildup is permitted to dimensionally correct 1750°F [955°C] minimum and air cooled to 200°F [95°C] or
unfilled areas produced during cold forming of stub ends. lower prior to any optional intermediate temper and prior to
Radiographic examination of the weld buildup shall not be final temper. The final temper shall be between 1050°F and
A 815/A 815M
1150°F [565°C and 620°C]. WP410 shall be heat treated in the same requirements as the base metal.
accordance with 6.1. 7.2.1 Welds on S23950 base metal shall be made with
6.4 All welding shall be done prior to final heat treatment. nominal 26 % Cr, 8 % Ni, 2 % Mo weld metal.
6.5 Fittings machined directly from a f
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