ASTM B677 - 23

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Designation: B677 −23
Standard Speciﬁcation for
Nickel-Iron-Chromium-Molybdenum, Iron-Nickel-Chromium-
Molybdenum-Copper, and Nickel-Iron-Chromium-
Molybdenum-Nitrogen Seamless Pipe and Tube
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This standard is issued under the ﬁxed designation B677; 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*
1.1 This speciﬁcation covers UNS N08925, UNS N08354,
UNS N08926
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, and UNS N08935 seamless, cold-worked or
hot-ﬁnished pipe and tube intended for general corrosive
service.
1.2 ASTM International has adopted deﬁnitions whereby
some grades, such as UNS N08904 previously in this
speciﬁcation, were recognized as stainless steels, because those
grades have iron as the largest element by mass percent. Such
grades are under the oversight of ASTM Committee A01 and
its subcommittees. The products of N08904 previously covered
in this speciﬁcation are now covered by Speciﬁcations A269
and A312/A312M.
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard.
1.4 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
Safety Data Sheet (SDS) for this product/material as provided
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability
of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
3
A269 Speciﬁcation for Seamless and Welded Austenitic
Stainless Steel Tubing for General Service
A312/A312M Speciﬁcation for Seamless, Welded, and
Heavily Cold Worked Austenitic Stainless Steel Pipes
B829 Speciﬁcation for General Requirements for Nickel and
Nickel Alloys Seamless Pipe and Tube
B899 Terminology Relating to Non-ferrous Metals and Al-
loys
E527 Practice for Numbering Metals and Alloys in the
Uniﬁed Numbering System (UNS)
3. Terminology
3.1 Deﬁnitions:
3.1.1 For deﬁnitions of terms used in this speciﬁcation, refer
to Terminology B899.
4. General Requirements
4.1 Material furnished under this speciﬁcation shall con-
form to the requirements of Speciﬁcation B829 unless other-
wise provided herein. In the case of conﬂict, the requirements
of this speciﬁcation shall take precedence.
5. Ordering Information
5.1 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:
5.1.1 Alloy name or UNS number.
5.1.2 ASTM designation and year of issue.
5.1.3 Finish.
5.1.4 Dimensions:
5.1.4.1 Tube—Outside diameter and the average or mini-
mum wall thickness.
5.1.4.2 Pipe—Standard pipe size and schedule.
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 April 1, 2023. Published April 2023. Originally
approved in 1980. Last previous edition approved in 2021 as B677 – 21. DOI:
10.1520/B0677-23.
2
New designation established in accordance with ASTM E527 and SAE J1086,
Recommended Practice for Numbering Metals and Alloys (UNS).
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*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
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.
1

5.1.4.3 Length (cut to length or random).
5.1.5 Quantity (feet or number of pieces).
5.1.6 Nondestructive Testing (see 8.2):
5.1.6.1 Pressure Requirements—Test pressure if other than
required by 8.2.1.
5.1.6.2 Specify if an electric test is to be performed.
5.1.7 Ends—Plain ends cut and deburred will be furnished.
If threaded ends or ends beveled for welding are desired, give
details.
5.1.8 Samples for Product (Check) Analysis—State whether
samples for product (check) analysis should be furnished (see
7.2).
5.1.9 Purchaser Inspection—If the purchaser wishes to
witness tests or inspection of material at the place of
manufacture, the purchase order must so state, indicating
which tests or inspections are to be witnessed.
6. Materials and Manufacture
6.1 The material shall be supplied in the solution-treated
condition.
NOTE 1—The recommended heat treatment shall consist of heating to a
temperature of 2010 °F to 2100 °F (1100 °C to 1150 °C) for UNS N08925
and UNS N08926, followed by quenching in water or rapid cooling by
other means. The recommended heat treatment shall consist of heating to
a temperature of 1975 °F (1080 °C) minimum for UNS N08935, followed
by water quenching or rapid cooling by other means.
7. Chemical Composition
7.1 The material shall conform to the requirements as to
chemical composition prescribed in Table 1. One test is
required for each lot as deﬁned in Speciﬁcation B829.
7.2 If a product (check) analysis is performed by the
purchaser, the material shall conform to the product (check)
analysis variations per Speciﬁcation B829.
8. Mechanical Properties and Other Requirements
8.1 Mechanical Properties—The material shall conform to
the mechanical properties prescribed in Table 2. One test is
required for each lot as deﬁned in Speciﬁcation B829.
8.2 Nondestructive Tests—Each pipe and tube shall be
subjected to either a hydrostatic test or a nondestructive electric
test as described in Speciﬁcation B829. The purchaser may
specify which test is to be used.
8.2.1 Hydrostatic Test—The ﬁber stress for the purpose of
calculating the hydrostatic test pressure shall be 20 000 psi
(138 MPa).
9. Dimensions and Permissible Variations
9.1 The permissible variations in dimensions set forth in
Speciﬁcation B829 shall apply.
10. Certiﬁcation
10.1 A manufacturer’s certiﬁcation shall be furnished to the
purchaser stating that material has been manufactured, tested,
and inspected in accordance with this speciﬁcation, and that the
test results on representative samples meet speciﬁcation re-
quirements. A report of the test results shall be furnished.
11. Keywords
11.1 N08354; N08925; N08926; N08935; seamless pipe;
seamless tube
TABLE 1 Chemical Requirements
A
Element UNS N08925 UNS N08926 UNS N08935 UNS N08354
Carbon 0.020 0.020 0.030 0.030
Manganese 1.0 2.00 1.2 1.00
Phosphorus 0.045 0.03 0.030 0.030
Sulfur 0.030 0.01 0.020 0.010
Silicon 0.50 0.5 0.5 1.00
Nickel 24.0 to 26.0 24.00 to 26.00 34.0 to 36.0 22.0 to 24.0
Chromium 19.0 to 21.0 19.00 to 21.00 26.0 to 28.0 34.0 to 36.0
Molybdenum 6.0 to 7.0 6.0 to 7.0 6.1 to 7.1 7.0 to 8.0
Copper 0.8 to 1.5 0.5 to 1.5 0.4 ...
Nitrogen 0.1 to 0.2 0.15 to 0.25 0.25 to 0.36 0.17 to 0.24
Iron balance balance balance balance
A
Maximum unless range is given. Where ellipses (...) appear in this table, there is no requirement and analysis for the element need not be determined or reported.
TABLE 2 Mechanical Properties of Pipe and Tube
Alloy Temper Tensile Strength,
min, ksi (MPa)
Yield Strength, 0.2 %
offset, min, ksi (MPa)
Elongation in 2 in. or
50 mm (or 4D), min, %
UNS N08925 solution annealed 87 (600) 43 (300) 40
UNS N08354 solution annealed 93 (640) 43 (295) 40
UNS N08926 solution annealed 94 (650) 43 (295) 35
UNS N08935 solution annealed 109 (750) 58 (400) 35
B677 − 23
2

SUMMARY OF CHANGES
Committee B02 has identiﬁed the location of selected changes to this standard since the last issue (B677 – 21)
that may impact the use of this standard. (Approved April 1, 2023.)
(1) Revised Title, Section 1, and Section 11 to add UNS
N08935.
(2) Added UNS N08935 to Table 1,Table 2, and Note 1.
(3) Revised Section 5and added Section 10.
(4) Revised Table 1 and added footnote A.
(5) Revised Section 3and added B899 to Section 2.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned
in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk
of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and
if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards
and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the
responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should
make your views known to the ASTM Committee on Standards, at the address shown below.
This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above
address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website
(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222
Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/
B677 − 23
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摘要：

ASTM B677 - 23 是美国材料与试验协会发布的关于UNS N08904（合金904L）无缝管与管材的标准规范，主要适用于腐蚀性环境中的压力容器、热交换器及化工管道系统。该标准规定了材料的化学成分、拉伸性能、热处理要求、尺寸公差及无损检测方法，确保管材在硫酸、磷酸等强腐蚀介质中具备优异的抗点蚀和缝隙腐蚀能力。与上一版本相比，ASTM B677 - 23 更新了制造工艺与检验条款，并强调了低温冲击韧性要求，以提升极端工况下的安全性。该规范常与 ASTM B676（焊接管）配合使用，为工程师

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