ASTM B674-05
(Specification)Standard Specification for UNS N08925, UNS N08354, and UNS N08926 Welded Tube
Standard Specification for UNS N08925, UNS N08354, and UNS N08926 Welded Tube
ABSTRACT
This specification covers the standard for UNS N08923, UNS N0835, and UNS N08926 welded tube for general corrosion applications. The tubes shall be manufactured from flat-rolled alloy by an automatic welding process with no addition of filler metal. The tubes shall also undergo cold-working subsequent to welding and prior to final heat treatment. Mechanical properties such as tensile strength, yield strength, and elongation shall be examined accordingly. Each specimen shall also be subjected to a flattening test, flange test, and nondestructive testing such as hydrostatic, pneumatic, eddy current, ultrasonic, leak, and electric test.
SCOPE
1.1 This specification covers UNS N08925,* UNS N08354, and UNS N08926 welded tube for general corrosion applications.
1.2 This specification covers outside diameter and nominal wall tube.
1.2.1 The tube sizes covered by this specification are 1/8 to 5 in. (3.2 to 127 mm) in outside diameter and 0.015 to 0.320 in. (0.38 to 8.13 mm), inclusive, in wall thickness.
1.3 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 Specification A 249/A 249M.
1.4 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.
1.5 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 provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B674 – 05
Standard Specification for
1
UNS N08925, UNS N08354, and UNS N08926 Welded Tube
This standard is issued under the fixed designation B674; 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 A249/A249M Specification for Welded Austenitic Steel
Boiler, Superheater, Heat-Exchanger, and Condenser
1.1 This specification covers UNS N08925,* UNS N08354,
Tubes
and UNS N08926 welded tube for general corrosion applica-
B751 Specification for General Requirements for Nickel
tions.
and Nickel Alloy Welded Tube
1.2 This specification covers outside diameter and nominal
E527 Practice for Numbering Metals and Alloys in the
wall tube.
1 Unified Numbering System (UNS)
1.2.1 The tube sizes covered by this specification are ⁄8 to 5
in. (3.2 to 127 mm) in outside diameter and 0.015 to 0.320 in.
3. Ordering Information
(0.38 to 8.13 mm), inclusive, in wall thickness.
3.1 Orders for material to this specification should include
1.3 ASTM International has adopted definitions whereby
the following information:
some grades, such as UNS N08904, previously in this speci-
3.1.1 Quantity (feet or number of lengths),
fication were recognized as stainless steels, because those
3.1.2 UNS number,
grades have iron as the largest element by mass percent. Such
3.1.3 Size (outsize diameter, minimum or average wall
grades are under the oversight of ASTM Committee A01 and
thickness),
itssubcommittees.TheproductsofN08904previouslycovered
3.1.4 Length (random or specific),
in this specification are now covered by Specification A249/
3.1.5 Class, and
A249M.
3.1.6 ASTM designation.
1.4 The values stated in inch-pound units are to be regarded
3.1.7 Product Analysis—State if required.
as standard. The values given in parentheses are mathematical
3.1.8 Certification—State if a certification or a report of test
conversions to SI units that are provided for information only
results is required.
and are not considered standard.
3.1.9 Purchaser Inspection—State which tests or inspec-
1.5 This standard does not purport to address all of the
tions are to be witnessed, if any (see Tables 1 and 2).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to become familiar
4. Materials and Manufacture
with all hazards including those identified in the appropriate
4.1 Tube shall be made from flat-rolled alloy by an auto-
Material Safety Data Sheet (MSDS) for this product/material
matic welding process with no addition or filler metal. Subse-
as provided by the manufacturer, to establish appropriate
quent to welding and prior to final annealing, the material shall
safety and health practices, and determine the applicability of
be cold-worked in either the weld metal only or both weld and
regulatory limitations prior to use.
base metal.
2. Referenced Documents
NOTE 1—The recommended heat treatment shall consist of heating to a
2
2.1 ASTM Standards: temperature of 1975 to 2150°F (1080 to 1180°C) for UNS N08354 or
2010 to 2100°F (1100 to 1150°C) for UNS N08925 and UNS N08926,
followed by quenching in water or rapid cooling by other means.
1
This specification is under the jurisdiction of ASTM Committee B02 on
4.2 Tube shall be furnished with oxide removed. When
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys. bright annealing is used, descaling is not necessary.
CurrenteditionapprovedJune1,2005.PublishedJuly2005.Originallyapproved
in 1980. Last previous edition approved in 2004 as B674 – 04. DOI: 10.1520/
5. Chemical Composition
B0674-05.
5.1 The material shall conform to the composition limits
* NewdesignationestablishedinaccordancewithPracticeE527andSAEJ1086,
Practice for Numbering Metals and Alloys (UNS). specified in Table 1. One test is required for each lot as defined
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
in Specification B751.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B674 – 05
TABLE 1 Chemical Requirements
Element
UNS N08925 UNS N08354 UNS N08926
Carbon, max 0.020 0.030 0.020
Manganese, max 1.00 1.00 2.00
Phosphorus, max 0.045 0.030 0.03
Sulfur, max 0.030 0.010 0.01
Silicon, max 0.50 1.00 0.5
Nickel 24.0 to 26.0 34.0 to 36.0 24.00 to 26.00
Chromium 19.0 to 21.0 22.0 to 24.0 19.00
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.