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TitleASTM-B366
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Table of Contents
                            Scope
Referenced Documents
TABLE 1
Terminology
Ordering Information
Materials and Manufacture
TABLE 2
Chemical Composition
Mechanical Properties and Other Requirements
TABLE 3
Dimensions
Workmanship, Finish, and Appearance
Inspection
Rejection and Rehearing
Certifications
Product Marking
Keywords
TABLE 4
                        
Document Text Contents
Page 1

Designation: B 366 – 04be1

Standard Specification for
Factory-Made Wrought Nickel and Nickel Alloy Fittings1

This standard is issued under the fixed designation B 366; 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.

e
1 NOTE—Editorial changes were made in Table 3 in November 2006.

1. Scope*

1.1 This specification covers wrought welding fittings for
pressure piping, factory-made from nickel and nickel alloys.
Threaded fittings as covered in ASME B16.11 are also covered
by this specification. The term welding applies to butt-welding
or socket-welding parts such as 45 and 90° elbows, 180° bends,
caps, tees, reducers, lap-joint stub ends, and other types, as
covered by ASME B16.9, ASME B16.11, MSS SP-43, MSS
SP-95, and MSS SP-97.

1.1.1 Several grades of nickel and nickel alloys are included
in this specification. Grades are designated with a prefix, WP or
CR, based on the applicable ASME or MSS dimensional and
rating standards.

1.1.2 Class WP fittings are those manufactured to the
requirements of ASME B16.9, B16.11.

1.1.3 For each of the WP nickel and nickel alloy grades,
several classes of fittings are covered to indicate whether
seamless or welded construction was utilized. Class designa-
tions are also utilized to indicate the nondestructive test method
and extent of nondestructive examination (NDE). Table 1 is
general summary of the fitting classes applicable to all WP
grades of nickel and nickel alloys covered by this specification.
There are no classes for the CR grades. Specific requirements
are covered elsewhere.

1.2 This specification does not apply to cast welding fit-
tings.

1.3 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.

1.4 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
information only.

1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
Material Safety Data Sheet for this product/material as pro-
vided by the manufacturer, to establish appropriate safety and
health practices, and determine the applicability of regulatory
limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards: 2

B 127 Specification for Nickel-Copper Alloy (UNS
N04400) Plate, Sheet, and Strip

B 160 Specification for Nickel Rod and Bar
B 161 Specification for Nickel Seamless Pipe and Tube
B 162 Specification for Nickel Plate, Sheet, and Strip
B 163 Specification for Seamless Nickel and Nickel Alloy

Condenser and Heat-Exchanger Tubes
B 164 Specification for Nickel-Copper Alloy Rod, Bar, and

Wire
B 165 Specification for Nickel-Copper Alloy (UNS

N04400)* Seamless Pipe and Tube
B 166 Specification for Nickel-Chromium-Iron Alloys

(UNS N06600, N06601, N06603, N06690, N06693,
N06025, and N06045)* and Nickel-Chromium-Cobalt-
Molybdenum Alloy (UNS N06617) Rod, Bar, and Wire

B 167 Specification for Nickel-Chromium-Iron Alloys
(UNS N06600, N06601, N06603, N06690, N06693,
N06025, and N06045)* and Nickel-Chromium-Cobalt-
Molybdenum Alloy (UNS N06617) Seamless Pipe and
Tube

1 This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.

Current edition approved Oct. 1, 2004. Published October 2004. Originally
approved in 1961. Last previous edition approved in 2004 as B 366 – 04a.

2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [email protected] For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.

TABLE 1 Fitting Classes for WP Grades

Class Construction Nondestructive Examination

S Seamless None
W Welded Radiography or Ultrasonic
WX Welded Radiography
WU Welded Ultrasonic

1

*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.

Page 2

B 168 Specification Nickel-Chromium-Iron Alloys (UNS
N06600, N06601, N06603, N06690, N06693, N06025,
and N06045) and Nickel-Chromium-Cobalt-Molybdenum
Alloy (UNS N06617) Plate, Sheet, and Strip

B 333 Specification for Nickel-Molybdenum Alloy Plate,
Sheet, and Strip

B 335 Specification for Nickel-Molybdenum Alloy Rod
B 407 Specification for Nickel-Iron-Chromium Alloy

Seamless Pipe and Tube
B 408 Specification for Nickel-Iron-Chromium Alloy Rod

and Bar
B 409 Specification for Nickel-Iron-Chromium Alloy Plate,

Sheet, and Strip
B 423 Specification for Nickel-Iron-Chromium-

Molybdenum-Copper Alloy (UNS N08825 and N08221)*
Seamless Pipe and Tube

B 424 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS
N08825 and UNS N08221)* Plate, Sheet, and Strip

B 425 Specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS
N08825 and UNS N08221)* Rod and Bar

B 434 Specification for Nickel-Molybdenum-Chromium-
Iron Alloys (UNS N10003, UNS N10242)* Plate, Sheet,
and Strip

B 435 Specification for UNS N06002, UNS N06230, UNS
N12160, and UNS R30556 Plate, Sheet, and Strip

B 443 Specification for Nickel-Chromium-Molybdenum-
Columbium Alloy (UNSN06625) and Nickel-Chromium-
Molybdenum-Silicon Alloy (UNS N06219)* Plate, Sheet,
and Strip

B 444 Specification for Nickel-Chromium-Molybdenum-
Columbium Alloys (UNS N06625 and UNS N06852) and
Nickel-Chromium-Molybdenum-Silicon Alloy (UNS
N06219) Pipe and Tube

B 446 Specification for Nickel-Chromium-Molybdenum-
Columbium Alloy (UNS N06625), Nickel-Chromium-
Molybdenum-Silicon Alloy (UNS N06219), and Nickel-
Chromium-Molybdenum-Tungsten Alloy (UNS N06650)*
Rod and Bar

B 462 Specification for Forged or Rolled UNS N06030,
UNS N06022, UNS N06035, UNS N06200, UNS N06059,
UNS N06686, UNS N08020, UNS N08024, UNS N08026,
UNS N08367, UNS N10276, UNS N10665, UNS N10675,
UNS N10629, UNS N08031, UNS N06045, UNS N06025,
and UNS R20033 Al

B 463 Specification for UNS N08020, UNS N08026, and
UNS N08024 Alloy Plate, Sheet, and Strip

B 464 Specification for Welded UNS N08020, N08024, and
N08026 Alloy Pipe

B 468 Specification for Welded UNS N08020, N08024, and
N08026 Alloy Tubes

B 472 Specification for Nickel Alloy Billets and Bars for
Reforging

B 473 Specification for UNS N08020, UNS N08024, and
UNS N08026 Nickel Alloy Bar and Wire

B 511 Specification for Nickel-Iron-Chromium-Silicon Al-
loy Bars and Shapes

B 512 Specification for Nickel-Chromium-Silicon Alloy
(UNS N08330) Billets and Bars

B 514 Specification for Welded Nickel-Iron-Chromium Al-
loy Pipe

B 515 Specification for Welded UNS N08120, UNS
N08800, UNS N08810, and UNS N08811 Alloy Tubes

B 516 Specification for Welded Nickel-Chromium-Iron Al-
loy (UNS N06600, UNS N06603, UNS N06025, and UNS
N06045) Tubes

B 517 Specification for Welded Nickel-Chromium-Iron-
Alloy (UNS N06600, UNS N06603, UNS N06025, and
UNS N06045) Pipe

B 535 Specification for Nickel-Iron-Chromium-Silicon Al-
loys (UNS N08330 and N08332) Seamless Pipe and Tube

B 536 Specification for Nickel-Iron-Chromium-Silicon Al-
loys (UNS N08330 and N08332) Plate, Sheet, and Strip

B 564 Specification for Nickel Alloy Forgings
B 572 Specification for UNS N06002, UNS N06230, UNS

N12160, and UNS R30556 Rod
B 573 Specification for Nickel-Molybdenum-Chromium-

Iron Alloys (UNS N10003, N10242)* Rod
B 574 Specification for Low-Carbon Nickel-Chromium-

Molybdenum, Low-Carbon Nickel-Molybdenum-
Chromium-Tantalum, Low-Carbon Nickel-Chromium-
Molybdenum-Copper, and Low-Carbon Nickel-
Chromium-Molybdenum-Tungsten Alloy Rod

B 575 Specification for Low-Carbon Nickel-Chromium-
Molybdenum, Low-Carbon Nickel-Chromium-
Molybdenum-Copper, Low-Carbon Nickel-Chromium-
Molybdenum-Tantalum, and Low-Carbon Nickel-
Chromium-Molybdenum-Tungsten Alloy Plate, Sheet, and
Strip

B 581 Specification for Nickel-Chromium-Iron-
Molybdenum-Copper Alloy Rod

B 582 Specification for Nickel-Chromium-Iron-
Molybdenum-Copper Alloy Plate, Sheet, and Strip

B 619 Specification for Welded Nickel and Nickel-Cobalt
Alloy Pipe

B 622 Specification for Seamless Nickel and Nickel-Cobalt
Alloy Pipe and Tube

B 625 Specification for UNS N08925, UNS N08031, UNS
N08932, UNS N08926, UNS N08354, and UNS R20033
Plate, Sheet, and Strip

B 626 Specification for Welded Nickel and Nickel-Cobalt
Alloy Tube

B 649 Specification for Ni-Fe-Cr-Mo-Cu-N Low-Carbon
Alloys (UNS N08925, UNS N08031, UNS N08354, and
UNS N08926), and Cr-Ni-Fe-N Low-Carbon Alloy (UNS
R20033) Bar and Wire, and Ni-Cr-Fe-Mo-N Alloy (UNS
N08936) Wire

B 673 Specification for UNS N08925, UNS N08354, and
UNS N08926 Welded Pipe

B 674 Specification for UNS N08925, UNS N08354, and
UNS N08926 Welded Tube

B 675 Specification for UNS N08367 Welded Pipe
B 676 Specification for UNS N08367 Welded Tube
B 677 Specification for UNS N08925, UNS N08354, and

UNS N08926 Seamless Pipe and Tube

B 366 – 04be1

2

Page 3

B 688 Specification for Chromium-Nickel-Molybdenum-
Iron (UNS N08366 and UNS N08367) Plate, Sheet, and
Strip

B 690 Specification for Iron-Nickel-Chromium-
Molybdenum Alloys (UNS N08366 and UNS N08367)
Seamless Pipe and Tube

B 691 Specification for Iron-Nickel-Chromium-
Molybdenum Alloys (UNS N08366 and UNS N08367)
Rod, Bar, and Wire

B 704 Specification for Welded UNS N06625, UNS
N06219 and UNS N08825 Alloy Tubes

B 705 Specification for Nickel-Alloy (UNS N06625,
N06219 and N08825) Welded Pipe

B 710 Specification for Nickel-Iron-Chromium-Silicon Al-
loy Welded Pipe

B 729 Specification for Seamless UNS N08020, UNS
N08026, and UNS N08024 Nickel-Alloy Pipe and Tube

B 880 Specification for General Requirements for Chemical
Check Analysis Limits for Nickel, Nickel Alloys and
Cobalt Alloys

B 899 Terminology Relating to Non-ferrous Metals and
Alloys

E 165 Test Method for Liquid Penetrant Examination
E 1916 Guide for Identification and/or Segregation of

Mixed Lots of Metals
2.2 ASME Standards:
B16.9 Wrought Steel Butt Welding Fittings3

B16.11 Forged Steel Fittings, Socket-Welding and
Threaded3

H34.1 Nickel Seamless Pipe and Tubing3

H34.2 Nickel-Copper Alloy Seamless Pipe and Tubing3

H34.3 Nickel-Chromium-Iron Alloy Seamless Pipe and
Tubing3

2.3 Manufacturers Standardization Society of the Valve and
Fittings Industry Standards:

MSS SP-25 Standard Marking Systems for Valves, Fittings,
Flanges, and Unions4

MSS SP-43 Standard Practice for Light Weight Stainless
Steel Butt Welding Fittings4

MSS SP-95 Sewage (D) Nipples and Bull Plugs4

MSS SP-97 Forged Carbon Steel Branch Outlet Fit-
tings–Socket Welding, Threaded and Butt Welding Ends4

Boiler and Pressure Vessel Code, Section VIII, Division
1, Pressure Vessels and Section IX, Welding Qualifica-
tions3

2.5 AWS Standards:
A5.11 Specification for Nickel and Nickel Alloy Covered

Welding Electrodes5

A5.14 Specification for Nickel and Nickel-Alloy Bare
Welding Rods and Electrodes5

3. Terminology

3.1 Terms defined in Terminology B 899 shall apply unless
otherwise defined in this standard.

4. Ordering Information

4.1 It is the responsibility of the purchaser to specify all
requirements that are necessary for material ordered under this
specification. Examples of such requirements include, but are
not limited to, the following:

4.1.1 Quantity, number of fittings of each kind,
4.1.2 Description of Fitting and Nominal Dimensions (stan-

dard or special),
4.1.3 Alloy Composition,
4.1.4 Condition (temper) if applicable.
4.1.5 If neither grade of N06625 is specified, Grade 1 will

be supplied.
4.1.6 For each Grade of WP fittings ordered, a Class should

also be indicated.
4.1.6.1 Grade CR fittings shall not be substituted for fittings

ordered to Grade WP, but Grade WP may be substituted for
Grade CR.

4.1.6.2 For all Classes of WP fittings, unless S, W, WX, or
WU is specified by the purchaser, any class may be furnished
at the option of the supplier.

4.1.7 Purchaser Inspection—State which tests or inspec-
tions are to be witnessed (Section 10),

4.1.8 Samples for Product (Check) Analysis—State
whether samples should be furnished (6.3),

4.1.9 Test reports (Section 12), and
4.1.10 Supplementary requirements, if any.

5. Materials and Manufacture

5.1 Material—The material for wrought welding fittings
may consist of forgings, rods, bars, plates, sheets, and seamless
or welded pipe that conform to all the requirements of the
ASTM specifications for the particular product and alloy
referred to in Table 2.

5.2 Manufacture:
5.2.1 Forging or shaping operations may be performed by

hammering, pressing, piercing, extruding, upsetting, rolling,
bending, or fusion welding, or by a combination of two or more
of these operations. The forming procedure shall be so applied
that it will not produce injurious defects in the fittings.

5.2.2 Grade WP fittings ordered as Class S shall be of
seamless construction and shall meet all requirements of
ASME B16.9 or B16.11.

5.2.3 All classes of fittings shall have the welders, welding
operators, and welding procedures qualified under the provi-
sions of Section IX of the ASME Boiler and Pressure Vessel
Code.

5.2.4 Grade WP fittings ordered as Class W shall meet the
requirements of ASME B16.9 and shall have all pipe welds
made by the starting material manufacturer or the fitting
manufacturer with the addition of filler radiographically exam-
ined throughout the entire length in accordance with Paragraph
UW-51 of Section VIII, Division 1, of the ASME Boiler and
Pressure Vessel Code, except as exempt by 5.2.4.1, and 5.2.4.2.

3 Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Three Park Ave., New York, NY 10016-5990.

4 Available from Manufacturers Standardization Society of the Valve and Fittings
Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.

5 Available from The American Welding Society (AWS), 550 NW LeJeune Rd.,
Miami, FL 33126.

B 366 – 04be1

3

Page 4

TABLE 2 Permissible Raw Materials

MarkingA Product and ASTM DesignationB

Corrosion-
Resistant
Fittings

ASME Pressure
Fittings

Alloy
UNS
Designation

Pipe or Tube
Plate,
Sheet,
or Strip

Bar Forging
and Forging

Stock

CRN WPN Ni N02200 B 161 B 162 B 160, B 564
CRNL WPNL Ni, Low C N02201 B 161 B 162 B 160
CRNCC WPNCC Ni-Cu N04400 B 165 B 127 B 164, B 564
CR HX WPHX Ni-Cr-Mo-Fe N06002 B 619, B 622, B 626 B 435 B 572
CR HG WPHG Ni-Cr-Fe-Mo-Cu N06007 B 619, B 622, B 626 B 582 B 581
CR HC 22 WPHC22 Low C-Ni-Mo-Cr N06022 B 619, B 622, B 626 B 575 B 574, B 564,

B 462, B 472
CRV602 WPV602 Ni-Cr-Fe N06025 B 163, B 167 B 168 B 166, B 462,

B 472
CR HG 30 WPHG30 Ni-Cr-Fe-Mo-Cu N06030 B 619, B 622, B 626 B 582 B 581, B 462,

B 472
CRHG35 WPHG35 Ni-Cr-Mo N06035 B 619, B 622, B 626 B 575 B 574, B 564,

B 462, B 472
CRV45TM WPV45TM Ni-Cr-Fe N06045 B 163, B 167 B 168 B 166, B 462,

B 472
CR2120 WP2120 Ni-Cr-Mo low C N06058 B 619, B 622, B 626 B 575 B 564, B 574
CR5923 WP5923 Low C-Ni-Cr-Mo N06059 B 619, B 622, B 626 B 575 B 564, B 574,

B 462, B 472
CR HC 2000 WPHC2000 Low C-Ni-Cr-Mo-Cu N06200 B 619, B 622, B 626 B 575 B 564, B 574,

B 462, B 472
CRM21 WPM21 Low C-Ni-Cr-Mo-Ta N06210 B 619, B 622, B 626 B 575 B 564, B 574
CRH230 WPH230 Ni-Cr-W-Mo N06230 B 619, B 622, B 626 B 435 B 572, B 564
CR HC 4 WPHC4 Low C-Ni-Mo-Cr N06455 B 619, B 622, B 626 B 575 B 574
CRNCI WPNCI Ni-Cr-Fe N06600 B 167, B 516, B 517 B 168 B 166, B 564
CR603GT WP603GT Ni-Cr-Fe-Al N06603 B 163, B 167, B 516, B 517 B 168 B 166, B 564
CRNCMC WPNCMC Ni-Cr-Mo-Cb N06625 B 444, B 704, B 705 B 443 B 446, B 564
CRIN686 WPIN686 Low C-Ni-Cr-Mo N06686 B 163, B 619, B 622, B 626 B 575 B 564, B 574,

B 462, B 472
CR626Si WP626Si Ni-Cr-Mo-Si N06219 B 444, B 704, B 705 B 443 B 446, B 564
CR HG3 WPHG3 Ni-Cr-Fe-Mo-Cu N06985 B 619, B 622, B 626 B 582 B 581
CR20CB WP20CB Cr-Ni-Fe-Mo-Cu-Cb

stabilized
N08020 B 464, B 468, B 729 B 463 B 472, B 473,

B 462
CR3127 WP3127 Low C-Ni-Fe-Cr-

Mo-Cu
N08031 B 619, B 622, B 626 B 625 B 564, B 649,

B 462, B 472
CRH120 WPH120 Ni-Cr-Fe N08120 B 407, B 514, B 515 B 409 B 408, B 564
CR330 WP330 Ni-Fe-Cr-Si N08330 B 535, B 710 B 536 B 511, B 512
CR6XN WP6XN Fe-Ni-Cr-Mo-N N08367 B 675, B 676, B 690 B 688 B 472, B 564,

B 691, B 462
CRNIC WPNIC Ni-Fe-Cr N08800 B 407, B 514, B 515 B 409 B 408, B 564
CRNIC10 WPNIC10 Ni-Fe-Cr N08810 B 407, B 514, B 515 B 409 B 408, B 564
CRNIC11 WPNIC11 Ni-Fe-Cr N08811 B 407 B 409 B 408, B 564
CRNICMC WPNICMC Ni-Fe-Cr-Mo-Cu N08825 B 423, B 704, B 705 B 424 B 425, B 564
CR904L WP904L Low C-Ni-Fe-Cr-

Mo-Cu
N08904 B 673, B 674, B 677 B 625 B 649

CR1925 WP1925 Low C-Ni-Fe-Cr-
Mo-Cu

N08925 B 673, B 674, B 677 B 625 B 649

CR1925N WP1925N Low C-Ni-Fe-Cr-Mo-
Cu-N

N08926 B 673, B 674, B 677 B 625 B 649

CR HB WPHB Ni-Mo N10001 B 619, B 622, B 626 B 333 B 335
CR HN WPHN Ni-Mo-Cr-Fe N10003 B 434 B 573
CR H242 WPH242 Ni-Mo-Cr-Fe N10242 B 619, B 622, B 626 B 434 B 573, B 564
CR HC 276 WPHC276 Low C-Ni-Mo-Cr N10276 B 619, B 622, B 626 B 575 B 574, B 564,

B 462, B 472
CRB10 WPB10 Low C-Ni-Mo-Cr-Fe N10624 B 619, B 622, B 626 B 333 B 335, B 564
CRVB4 WPVB4 Ni-Mo N10629 B 619, B 622, B 626 B 333 B 335, B 564,

B 462, B 472
CR HB2 WPHB-2 Ni-Mo N10665 B 619, B 622, B 626 B 333 B 335, B 564,

B 462, B 472
CR HB3 WPHB–3 Ni-Mo N10675 B 619, B 622, B 626 B 333 B 335, B 564,

B 462, B 472
CRH160 WPH160 Ni-Co-Cr-Si N12160 B 619, B 622, B 626 B 435 B 564, B 572
CR3033 WP3033 Low C-Cr-Ni-Fe-N R20033 B 619, B 622, B 626 B 625 B 564, B 649,

B 472, B 462
CRH556 WPH556 Ni-Fe-Cr-Co R30556 B 619, B 622, B 626 B 435 B 572

A When WP fittings are of welded construction or made from welded pipe, the symbol shall be supplemented with W or WX as applicable. If ultrasonic examination in
accordance with 5.2.4.2 or 5.2.5.1 is used, the symbol shall be supplemented by WU or WXU as applicable.

B See 2.1 and 5.1.
C Yield strength shall be 25 000 psi (172 MPa) min, for all hot-formed, annealed fittings made from WPNC material.

B 366 – 04be1

4

Page 5

5.2.4.1 The weld in the starting pipe, made to one of the
pipe or tube product specifications listed in Table 2, shall not
require radiography, provided that no filler metal is used in
making the weld.

5.2.4.2 Instead of the radiographic examination, and at the
option of the manufacturer, welds made by the fitting manu-
facturer may be ultrasonically examined in accordance with the
Code requirements stated in 5.2.6.

5.2.5 Grade WP fittings ordered as Class WX shall meet the
requirements of ASME B16.9 and shall have all welds, whether
made by the fitting manufacturer or the starting material
manufacturer, radiographically examined throughout their en-
tire length in accordance with Paragraph UW-51 of Section
VIII, Division 1, of the ASME Boiler and Pressure Vessel
Code, except as exempt by 5.2.5.1. The radiography for this
class of fittings may be done either prior to or after forming at
the option of the manufacturer.

5.2.5.1 Instead of the radiographic examination, and at the
option of the manufacturer, welds, whether made by the fitting
manufacturer or the starting material manufacturer, may be
ultrasonically examined in accordance with the Code require-
ments stated in 5.2.6.

5.2.6 Grade WP fittings ordered as Class WU shall meet the
requirements of ASME B16.9 and shall have all welds, whether
made by the fitting manufacturer of the starting material
manufacturer, ultrasonically examined throughout their entire
length in accordance with Appendix 12 of Section VIII,
Division 1, of the ASME Boiler and Pressure Vessel Code. The
ultrasonic examination of welds for this class may be per-
formed either prior to or after forming at the option of the
manufacturer.

5.2.7 Personnel performing NDE examinations shall be
qualified in accordance with SNT-TC-1A.

5.2.8 Fittings covered in MSS SP-43, MSS SP-95, or MSS
SP-97 and ordered as CR*** shall meet the requirements of
MSS SP-43, MSS SP-95, or MSS SP-97, respectively, and do
not require non-destructive examination.

5.2.9 All joints welded with filler metal shall be finished in
accordance with the requirements of Paragraph UW-35 (a) of
Section VIII, Division 1, of the ASME Boiler and Pressure
Vessel Code.

5.2.10 Radiographic examination of the weld buildup on
cold-formed stub ends shall not be required provided that all
the following steps are adhered to:

5.2.10.1 The weld procedure and welders or welding opera-
tors meet the requirements of 5.2.3.

5.2.10.2 All weld surfaces are liquid penetrant examined in
accordance with Appendix 8 of Section VIII, Division 1 of the
ASME Boiler and Pressure Vessel Code.

5.2.10.3 Repair of areas in the weld is permitted, but
5.2.10.1 and 5.2.10.2 must be repeated.

5.2.10.4 Fittings shall be marked with the symbol WBU
following the alloy designation (for example: WPN-WBU).

5.2.11 Stubends may be produced with the entire lap added
as weld metal to a straight pipe section provided the welding
satisfies the requirements of 5.2.3 for qualifications and 5.3 for
heat treatment.

5.2.11.1 Grade WP****Class W – Radiographic examina-
tion of the welds, made with the addition of filler metal, is
required. See 5.2.4.

5.2.11.2 Grade WP****Class WX – Radiographic exami-
nation of all welds, made with or without the addition of filler
metal is required. See 5.2.5.

5.2.11.3 Grade WP****Class WU – Ultrasonic examina-
tion of all welds, made with or without the addition of filler
metal, is required. See 5.2.6.

5.2.11.4 Grade CR – Nondestructive examination is not
required. See 5.2.8.

5.2.12 Stubends may be produced with the entire lap added
by the welding of a ring, made from plate or flat bar of the
same alloy grade and composition, to the outside of a straight
section of pipe, provided the weld is a double welded full
penetration joint and satisfies the requirements of 5.2.3 for
qualifications and 5.3 for heat treatment.

5.2.12.1 Grade WP****Class W – Radiographic examina-
tion of all welds, made with the addition of filler metal, is
required. See 5.2.4.

5.2.12.2 Grade WP****Class WX – Radiographic exami-
nation of all welds, made with or without the addition of filler
metal, is required. See 5.2.5.

5.2.12.3 Grade WP****Class WU – Ultrasonic examina-
tion of all welds, made with or without the addition of filler
metal, is required. See 5.2.6.

5.2.12.4 Grade CR – Nondestructive examination is not
required. See 5.2.8.

5.3 Heat Treatment—All fittings shall be furnished heat
treated. See Table 3 for recommended heat treatments. All
forming or welding shall be done and completed prior to any
final heat treatment. For seamless fittings made without form-
ing, heat treatment, if any, shall be agreed upon between
purchaser and manufacturer.

6. Chemical Composition

6.1 The material shall conform to the requirements as to
chemical composition for the respective material prescribed in
Table 2.

6.2 Records of chemical analysis made in accordance with
the applicable specification listed in Table 2 shall be certifica-
tion that the material of the fitting meets the requirements of
this specification.

6.3 If a product (check) analysis is made by the purchaser,
the material shall conform to the requirements for product
(check) analysis prescribed for the respective product in Table
2 and Specification B 880. for check analysis.

6.4 In fittings of welded construction, the alloy content of
the deposited weld metal shall conform to that required of the
base metal or for equivalent weld metal as given in the AWS
Filler Metal Specification A5.11 and A5.14.

7. Mechanical Properties and Other Requirements

7.1 Tensile Requirements:
7.1.1 (All Table 2 alloys except for UNS N06625 Grade 1 or

Grade 2)
7.1.1.1 Material used in the manufacture of the fittings shall

conform to the requirements for tensile properties as prescribed
for the respective product in Table 2.

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7.1.1.2 Finished fittings shall conform to the properties for
the respective material and temper as prescribed in the speci-
fications referred to in Table 2. When required, the properties
of fittings made from forging stock shall be as agreed upon
between the producer and the purchaser.

7.1.1.3 Tension tests of the finished fittings are not required,
unless otherwise agreed upon between the manufacturer and
the purchaser.

7.1.2 Tensile Requirements (For fittings made to meet the
mechanical properties of UNS N06625 Grade 1):

7.1.2.1 At the option of the manufacturer, the material used
in the manufacture of UNS N06625 Grade 1 fittings shall
conform to the mechanical property requirements of either

UNS N06625 Grade 1 or Grade 2 as prescribed for the
respective product in Table 2.

7.1.2.2 Tension tests are required in accordance with
7.1.2.3.

7.1.2.3 Tension tests are required per lot (Note S2.3) per
furnace charge. Tension specimens may be obtained from a
fitting or a representative test piece (Note S2.2). Tension
specimens representing fittings of welded construction, made
with the addition of filler metal, are to include the weld and be
prepared so that the weld is at the specimen’s midlength
location.

7.1.2.4 The finished fittings shall conform to the minimum
UNS N06625 Grade 1 mechanical properties as prescribed for

TABLE 3 Heat Treatment

Corrosion
Resistant
Fittings

ASME
Pressure
Fittings

Alloy
UNS
Designation

Heat TreatmentA,B

DEG F (DEG C)
Quench

CRN WPN Ni N02200 1650-1700 (900 to 928)† Rapid Air/Water
CRNL WPNL Ni, Low C N02201 1650-1700 (900 to 928) Rapid Air/Water
CRNCC WPNCC Ni-Cu N04400 1650-1700 (900 to 928) Rapid Air/Water
CR HX WPHX Ni-Cr-Mo-Fe N06002 2150 (1177)D Rapid Air/Water
CR HG WPHG Ni-Cr-Fe-Mo-Cu N06007 2100-2150 (1150 to 1177) Rapid Air/Water
CR HC 22 WPHC22 Low C-Ni-Mo-Cr N06022 2050 (1121)D † Rapid Air/Water
CRV602 WPV602 Ni-Cr-Fe N06025 2200 (1204)E Rapid Air/Water
CR HG 30 WPHG30 Ni-Cr-Fe-Mo-Cu N06030 2150 (1177)D Rapid Air/Water
CRHG35 WPHG35 Ni-Cr-Mo N06035 2050 (1121) Rapid Air/Water
CRV45TM WPV45TM Ni-Cr-Fe N06045 2150 (1177) Rapid Air/Water
CR5923 WP5923 Low C-Ni-Cr-Mo N06059 2050 (1121) Rapid Air/Water
CR HC 2000 WPHC2000 Low C-Ni-Cr-Mo-Cu N06200 2075-2125 (1135-1163) Rapid Air/Water
CRM21 WPM21 Low C-Ni-Cr-Mo-Ta N06210 E E

CRH230 WPH230 Ni-Cr-W-Mo N06230 2150-2250 (1177-1232) Rapid Air/Water
CR HC 4 WPHC4 Low C-Ni-Mo-Cr N06455 1950 (1065)D Rapid Air/Water
CRNCI WPNCI Ni-Cr-Fe N06600 1800-1850 (983 to 1010) Rapid Air/Water
CR603GT WP603GT Ni-Cr-Fe-Al N06603 2175 (1189) Rapid Air/Water
CRNCMC WPNCMC Ni-Cr-Mo-Cb N06625 Gr 1 1600 (871) Rapid Air/Water
CRNCMC WPNCMC Ni-Cr-Mo-Cb N06625 Gr 2 2000 (1093)D† Rapid Air/Water
CRIN686 WPIN686 Low C-Cr-Ni-Mo N06686 2150 (1177) Rapid Air/Water
CR626Si WP626Si Ni-Cr-Mo-Si N06219 2050 (1121)† Rapid Air/Water
CR HG3 WPHG3 Ni-Cr-Fe-Mo-Cu N06985 2100-2150 (1147 to 1177) Rapid Air/Water
CR20CB WP20CB Cr-Ni-Fe-Mo-Cu-Cb

stabilized
N08020 1700-1850 (927 to 1010) Rapid Air/Water

CR904L WP904L Low C-Ni-Fe-Cr-Mo-Cu N08904 1985-2100 (1085 to 1150) Rapid Air/Water
CR3127 WP3127 Low C-Ni-Fe-Cr-Mo-Cu N08031 2175 (1189) Rapid Air/Water
CRH120 WPH120 Ni-Cr-Fe N08120 2175-2225 (1189-1220) Rapid Air/Water
CR330 WP330 Ni-Fe-Cr-Si N08330 1900 (1038) Rapid Air/Water
CR6XN WP6XN Fe-Ni-Cr-Mo-N N08367 2025 (1107) Rapid Air/Water
CRNIC WPNIC Ni-Fe-Cr N08800 1800-1900 (983 to 1038)F† Rapid Air/Water
CRNIC10 WPNIC10 Ni-Fe-Cr N08810 2100-2150 (1147 to 1177)F Rapid Air/Water
CRNIC11 WPNIC11 Ni-Fe-Cr N08811 2100-2150 (1147 to 1177)F Rapid Air/Water
CRNICMC WPNICMC Ni-Fe-Cr-Mo-Cu N08825 1700-1800 (930 to 983)F† Rapid Air/Water
CR1925 WP1925 Low C-Ni-Fe-Cr-Mo-Cu N08925 1800-1900 (983 to 1038)† Rapid Air/Water
CR2120 WP2120 Low C-Ni-Cr-Mo N06058 2075 (1135) Rapid Air/Water
CR1925N WP1925N Low C-Ni-Fe-Cr-Mo-Cu-N N08926 2150 (1177) Rapid Air/Water
CRHB WPHB Ni-Mo N10001 1950 (1065)D Rapid Air/Water
CRHN WPHN Ni-Mo-Cr-Fe N10003 2150 (1177)D Rapid Air/Water
CR H242 WPH242 Ni-Mo-Cr-Fe N10242 1925-2025 (1050-1105) Rapid Air/Water
CR HC 276 WPHC276 Low C-Ni-Mo-Cr N10276 2050 (1121)D Rapid Air/Water
CRB10 WPB10 Low C-Ni-Mo-Cr-Fe N10624 2050 (1121) Rapid Air/Water
CRVB4 WPVB4 Ni-Mo N10629 1975 (1080) Rapid Air/Water
CR HB2 WPHB2 Ni-Mo N10665 1950 (1065)D Rapid Air/Water
CR HB3 WPHB3 Ni-Mo N10675 1950 (1065)D Rapid Air/Water
CRH160 WPH160 Ni-Co-Cr-Si N12160 2025 (1107)D Rapid Air/Water
CR3033 WP3033 Low C-Cr-Ni-Fe-N R20033 2050 (1121) Rapid Air/Water
CRH556 WPH556 Ni-Fe-Cr-Co R30556 2150 (1177)D Rapid Air/Water

A Recommended set temperatures – Different termperatures may be selected by either the purchaser or the manufacturer.
B Set temperature, 625°F.
C Yield strength shall be 25 000 psi (172 MPa) min, for all hot-formed, annealed fittings made from WPNC material.
D Minimum temperature.
E Annealing temperature and quench shall be agreed upon between purchaser and manufacturer.
F Heat treatment is highly dependent on intended service temperature – consult material manufacturer for specific heat treatments for end use temperature.

† Corrected editorially.

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the respective starting raw material product listed in Table 2
except that fittings of welded construction are exempt from the
tensile ductility requirement (elongation) and the yield strength
requirements. The minimum mechanical properties for fittings
made from forging stock shall be as agreed upon between
manufacturer and purchaser.

7.1.3 Tensile Requirements (For fittings made to meet the
mechanical properties of UNS N06625 Grade 2):

7.1.3.1 At the option of the manufacturer, the material used
in the manufacture of UNS N06625 Grade 2 fittings shall
conform to the mechanical property requirements of either
UNS N06625 Grade 1 or Grade 2 as prescribed for the
respective product in Table 2.

7.1.3.2 Tension tests are not required provided the grade of
starting raw material is designated as UNS N06625 Grade 2 in
the raw material manufacturer’s MTR description and the final
heat treat temperature of the fittings is in compliance with the
recommended solution annealing heat treat procedure for the
grade. Tension tests are required if the grade of starting raw
material is designated as UNS N06625 Grade 1 in the raw
material manufacturer’s MTR description.

7.1.3.3 Tension tests, if required, are to be performed per lot
(Note S2.3) provided that all heat treatments are performed in
furnaces controlled within a 6 25°F range of set point and are
equipped with calibrated recording pyrometers so that all other
subsequent heat treatments can be conducted within the same
6 25°F temperature range as the furnace charge that contained
the test specimen. Tension specimens may be obtained from a
fitting or a representative test piece. In this paragraph only, a
representative test piece is defined as a test specimen from the
same heat of fitting raw material having approximately the
same amount of working. In addition, the test piece represent-
ing fittings manufactured from bars, plate or forgings shall
have a cross section equal to the greatest cross section of the
fitting, a test piece representing fittings manufactured from
pipe shall have an outside diameter and wall thickness equal to
those of the fitting and a test piece for fittings of welded
construction, made with the addition of filler metal, shall be
prepared to the same welding procedures and from the same
heat of material as the fittings it represents. Tension specimens
representing fittings of welded construction, made with the
addition of filler metal, are to include the weld and be prepared
so that the weld is at the specimen’s midlength location.

7.1.3.4 The finished fittings shall conform to the minimum
UNS N06625 Grade 2 mechanical properties as prescribed for
the representative starting raw material product listed in Table
2 except that fittings of welded construction are exempt from
the tensile ductility requirement (elongation) and the yield
strength requirements. The minimum mechanical properties for
fittings made from forging stock shall be as agreed upon
between manufacturer and purchaser.

7.2 Hydrostatic Tests:
7.2.1 Hydrostatic testing of wrought fittings is not required

by this specification.
7.2.2 All fittings shall be capable of withstanding without

failure, leakage, or impairment of their serviceability, a test
pressure prescribed in the specifications for the pipe with
which the fitting is recommended to be used.

8. Dimensions

8.1 Fittings or components produced in accordance with this
specification shall have sizes, shapes, and dimensions in
accordance with those specified in ASME 16.9, ASME 16.11,
MSS SP-43, MSS SP-95, MSS SP-97, ASME H34.1, ASME
H34.2, or ASME H34.3.

9. Workmanship, Finish, and Appearance

9.1 The fittings shall be free of injurious defects and have a
workmanlike finish. Minor defects may be removed by grind-
ing, provided the wall thickness is not decreased to less than
the allowable specification minimum and provided the grinding
is smooth and leaves no shoulders.

9.2 The fittings shall be cleaned free of scale.

10. Inspection

10.1 Inspection of the material by the purchaser at the place
of manufacture shall be made as agreed upon between the
purchaser and the manufacturer as part of the purchase
contract.

11. Rejection and Rehearing

11.1 Material that fails to conform to the requirements of
this specification may be rejected. Rejection should be reported
to the producer or supplier promptly and in writing. In case of
dissatisfaction with the results of the test, the producer or
supplier may make claim for a rehearing.

12. Certifications

12.1 Test reports are required for all fittings covered by this
specification. Each test report shall include the following
information:

12.1.1 The year-date of the specification and class to which
the fitting was furnished,

12.1.2 Heat numbers or serial number traceable to heat
numbers,

12.1.3 Chemical analyses for all starting materials,
12.1.4 Mechanical properties for all starting materials, or

actual mechanical properties if tension testing was required,
12.1.5 For construction with filler metal added, weld metal

chemical analyses or AWS classification,
12.1.6 For welded stub ends, the construction method per

5.2.11 or 5.2.12 shall be stated,
12.1.7 Heat treatment per Table 3,
12.1.8 Results of all nondestructive examinations,
12.1.9 Results of all tests required by Supplementary Re-

quirements and the order, and
12.1.10 Statement that the fitting was manufactured,

sampled, tested and inspected in accordance with the specifi-
cation and was found to meet the requirements.

13. Product Marking

13.1 The manufacturer’s name or trademark, material,
grade, if applicable, the size and schedule number, the desig-
nation as shown in Table 2, under “Marking,” either column 1
for Grade CR fittings or column 2 for Grade WP fittings, shall
be stamped, stenciled, or otherwise permanently marked on
each fitting. Grade WP fitting marking also must include the

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suffix in accordance with 5.2. On wall thicknesses thinner than
0.083 in., no steel stamps or other indented markings shall be
used. When the size does not permit complete marking,
identification marks may be omitted in the sequence shown in
MSS SP-25. See Table 4 for marking example of grades and
classes.

NOTE 1—When steel stamps are used, the marking shall not be deep
enough to cause cracks or to reduce the wall thickness of the fittings below
the minimum allowed by the applicable specification.

14. Keywords

14.1 nickel alloy fittings

SUPPLEMENTARY REQUIREMENTS

These requirements shall not be considered unless specified in the order, in which event the
supplementary requirements specified shall be made at the place of manufacture, unless otherwise
agreed upon.

S1. Product Analysis (Note S2.1)

S1.1 A product analysis shall be made from each heat of
base metal and, if of welded construction, from each lot (Note
S2.3) number of welding material of the fittings offered for
delivery. The analysis shall conform to the requirements
specified in Section 6.

S2. Tension Test (Note S2.1)

S2.1 One tension test shall be made on one fitting or
representative test piece (Note S2.2) per lot (Note S2.3) of
fittings. If the fittings are of welded construction, made with the
addition of filler metal, the tension specimen shall include the
weld and be prepared so that the weld is at the midlength
location of the specimen. However, in no case shall the tensile
properties of the finished fittings be less than the requirements
of the pipe specifications listed in Table 2, except that weld
specimens are exempt from the tensile ductility requirements.

NOTE S2.1—If the results of any of the tests specified in Sections S1 or
S2 do not conform to requirements, retests may be made at the manufac-
turer’s expense on additional fittings or representative test pieces of
double the original number from the same heat or lot as defined in Section
S1 or S2. If either of the additional test pieces fails, the lot shall be
rejected.

NOTE S2.2—Representative Test Piece: Where the test specimen for the
tension test cannot be taken from a fitting due to size limitations, a
representative test shall be obtained. The test piece shall be from the same
heat and heat treated in the same batch or charge as the fittings it
represents, and shall have approximately the same amount of working. In
addition, test pieces representing fittings manufactured from bars, plate, or
forgings shall have a cross section equal to the greatest cross section of the
fitting, and test pieces representing fittings manufactured from pipe shall
have an outside diameter and wall thickness equal to those of the fitting.
The test piece for fittings of welded construction, made with the addition

of filler metal, shall be prepared to the same weld procedures and from the
same heats of material as the fittings it represents.

NOTE S2.3—A lot shall consist of all fittings of the same type, size, and
wall thickness, manufactured from one heat of material, and, if welding is
performed, using the same size and AWS classification welding product.

S3. Liquid Penetrant Test

S3.1 All surfaces shall be liquid penetrant tested. The
method shall be in accordance with Practice E 165. Acceptance
limits shall be as specified by the purchaser.

S4. Hydrostatic Test

S4.1 A hydrostatic test shall be applied as agreed upon
between the manufacturer and purchaser.

S5. Bar Stock Fittings

S5.1 Fittings machined from solid bar stock are not permit-
ted.

S6. Positive Material Identification Examination

S6.1 Product shall receive Positive Material Identification to
ensure that the purchaser is receiving product of the correct
material grade prior to shipment of the product. This exami-
nation is a method to assure that no material grade mix-up has
happened during manufacturing and marking of the product.

S6.2 Product shall receive a Positive Material Identification
examination by Guide E 1916.

S6.3 The quantity examined shall be 100 % of the product.
S6.4 All product that is not of the correct material grade

shall be rejected.
S6.5 The method of product marking after examination

shall be agreed upon between the manufacturer and purchaser.

TABLE 4 Product Marking Examples for Grades and Classes

Grade and Class Marking Description

CRN Single grade: no classes in CR grades
CRN/NL Multiple grades, meet chemical and mechanical properties of each
WPN-S Single grade: seamless
WPN-W Single grade: welded: RT or UT pipe welds with filler metal and all

fitting manufacturer’s welds
WPN-WX Single grade: welded: RT all welds with or without filler metal
WPN-WU Single grade: welded: UT all welds with or without filler metal
WPN/NL-S Multiple grades: meet chemical and mechanical properties of each:

seamless

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