ASTM B626-03

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Designation: B 626 – 03
Standard Specification for
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Welded Nickel and Nickel-Cobalt Alloy Tube
This standard is issued under the fixed designation B 626; 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 4. Classification
1.1 This specification covers welded tubes made from the 4.1 Five classes of tube are covered as follows:
nickel and nickel-cobalt alloys (UNS N10001, UNS N10242, 4.1.1 Class IA—Welded, sized, solution annealed, and non-
UNS N10665, UNS N12160, UNS N10629, UNS N10624, destructively tested in accordance with 4.2.1.
UNS N10675, UNS N10276, UNS N06455, UNS N06007, 4.1.2 Class IB—Welded, sized, and solution annealed.
UNS N06975, UNS N08320, UNS N06985, UNS N06002, 4.1.3 Class IIA—Welded, cold worked, solution annealed,
UNS N06022, UNS N06030, UNS N06058, UNS N06059, and nondestructively tested in accordance with 4.2.1.
UNS N06200, UNS N06210, UNS N08031, UNS R30556, 4.1.4 Class IIB—Welded, cold worked, and solution an-
UNS N06230, UNS N06686, and UNS R20033)* listed in nealed.
Table 1 intended for heat exchanger and condenser tubes and 4.1.5 Class III—Welded, cold worked, solution annealed,
tubes for general corrosive service for heat-resisting applica- and nondestructively tested in accordance with 4.2.2.
tions. 4.2 Nondestructive Tests:
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1.2 This specification covers tube ⁄8 to 3 ⁄2 in. (3.2 to 88.9 4.2.1 Class IA and Class IIA Tubes—Each finished tube
mm) in outside diameter and 0.015 to 0.148 in. (0.41 to 3.7 shall be subjected to the hydrostatic test, the pneumatic test, or
mm) inclusive, in wall thickness. the eddy current test at the manufacturer’s option.
1.3 The values stated in inch-pound units are to be regarded 4.2.2 Class III Tubes—Each finished tube shall be subjected
as the standard. The values given in parentheses are for to the pneumatic test and the eddy current test. Tubes larger
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information only. than 1 ⁄2 in. (38.1 mm) in outside diameter may be subjected to
1.4 This standard does not purport to address all of the the hydrostatic test in lieu of the pneumatic test at the
safety concerns, if any, associated with its use. It is the manufacturer’s option.
responsibility of the user of this standard to become familiar
5. Ordering Information
with all hazards including those identified in the appropriate
5.1 It is the responsibility of the purchaser to specify all
safety and health practices, and determine the applicability of
requirements that are necessary for material ordered under this
regulatory limitations prior to use.
specification. Examples of such requirements include, but are
2. Referenced Documents
not limited to the following:
2.1 ASTM Standards: 5.1.1 Alloy (Table 1),
B 751 Specification for General Requirements for Nickel 5.1.2 Class (see 4),
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and Nickel Alloy Welded Tube 5.1.3 Quantity (feet or number of lengths),
5.1.4 Size (outside diameter and average wall thickness),
3. General Requirements—
5.1.5 Length (cut or random),
3.1 Material furnished in accordance with this specification 5.1.6 Certification—State if certification or a report of test
shall conform to the applicable requirements of the current
results is required,
edition of Specification B 751 unless otherwise provided 5.1.7 Purchaser Inspection—State which tests or inspec-
herein.
tions are to be witnessed,
5.1.8 Ends—Plain ends cut and deburred will be furnished,
unless otherwise specified, and
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This specification is under the jurisdiction of ASTM Committee B02 on
5.1.9 Samples for Product (Check) Analysis—State whether
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
samples shall be furnished.
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved June 10, 2003. Published July 2003. Originally
approved in 1977. Last previous edition approved in 2001 as B 626 - 01.
* New designations established in accordance with ASTM E 527 and SAE
J1086, Practice for Numbering Metals and Alloys (UNS).
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Annual Book of ASTM Standards, Vol 02.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B626–03
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TABLE 1 Chemical Requirements
Composition Limits, %
Ni Cr Mo Fe W C Si Co Mn V P S Ti Cu Cb Al Zr La N B Cb Ta Ni+ Mg
max max max (Nb) (Nb) Mo
+Ta
Ni-Mo Alloys
N10001 remainder 1.0 26.0- 4.0-6.0 . 0.05 1.0 2.5 1.0 0.2- 0.04 0.03 . . .
max 30.0 max max max 0.4
N10665 remainder 1.0 26.0- 2.0 max . 0.02 0.10 1.0 1.0 . 0.04 0.03 . . .
max 30.0 max max max
N10675 65.0 min 1.0- 27.0- 1.0-3.0 3.0 0.01 0.10 3.0 3.0 0.
...