ASTM B394-18
(Specification)Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes
Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes
ABSTRACT
This specification covers wrought niobium and niobium alloy seamless and welded tubes. Material covered by this specification shall be made from ingots that are produced by vacuum or plasma arc melting, vacuum electron-beam melting, or a combination of these three methods. Seamless tubes may be made by any seamless method that will yield a product meeting the requirements of this specification. Welded tubing shall be made from flat-rolled products by an automatic or semiautomatic welding process with no addition of filler metal in the welding operation. The niobium and niobium alloy ingots and billets for conversion to finished products covered by this specification shall conform to the requirements for chemical composition of the following elements: carbon, nitrogen, oxygen, hydrogen, zirconium, tantalum, iron, silicon, tungsten, nickel, molybdenum, hafnium, titanium. When specified, the following elements shall be included in the chemical composition of the specimen: boron, aluminum, beryllium, chromium, and cobalt. The materials supplied under these specifications shall be in the fully annealed condition. Finished niobium and niobium alloy tubes shall be free of injurious internal and external imperfections of a nature that will interfere with the purpose for which it was intended. Hydrostatic and pneumatic tests are optional when the purchaser requires. A hydrostatic test shall be performed on each tube and shall withstand without showing bulges, leaks, or other defects.
SIGNIFICANCE AND USE
13.1 For the purposes of determining compliance with the specified limits for requirements of the properties listed in this specification, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.
SCOPE
1.1 This specification covers wrought niobium and niobium alloy seamless and welded tubes as follows:
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
1.1.2 R04210-Type 2—Commercial grade unalloyed niobium,
1.1.3 R04251-Type 3—Reactor grade niobium alloy containing 1 % zirconium, and
1.1.4 R04261-Type 4—Commercial grade niobium alloy containing 1 % zirconium.
1.2 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.
1.3 The following precautionary caveat pertains only to the test methods portion of this specification. 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
General Information
Relations
Standards Content (Sample)
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.
Designation:B394 −18
Standard Specification for
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Niobium and Niobium Alloy Seamless and Welded Tubes
This standard is issued under the fixed designation B394; 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 E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers wrought niobium and niobium
E2626 Guide for Spectrometric Analysis of Reactive and
alloy seamless and welded tubes as follows:
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Refractory Metals (Withdrawn 2017)
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
1.1.2 R04210-Type 2—Commercial grade unalloyed
3. Terminology
niobium,
1.1.3 R04251-Type 3—Reactorgradeniobiumalloycontain- 3.1 Definitions of Terms Specific to This Standard:
ing 1 % zirconium, and 3.1.1 lot, n—a lot shall consist of all material produced from
1.1.4 R04261-Type 4—Commercial grade niobium alloy the same ingot at one time, with the same cross section,
containing 1 % zirconium. processed with the same nominal metallurgical parameters and
heat treated at the same conditions.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Ordering Information
conversions to SI units that are provided for information only
and are not considered standard. 4.1 Orders for materials under this specification shall in-
clude the following information as applicable:
1.3 The following precautionary caveat pertains only to the
4.1.1 Type and grade (Section 1),
test methods portion of this specification. This standard does
4.1.2 ASTM designation and year of issue,
not purport to address all of the safety concerns, if any,
4.1.3 Welding (Section 5),
associated with its use. It is the responsibility of the user of this
4.1.4 Quantityinweight,numberofpieces,anddimensions,
standard to establish appropriate safety, health, and environ-
4.1.5 Chemistry (6.3),
mental practices and determine the applicability of regulatory
4.1.6 Temper designation (Section 8),
limitations prior to use.
4.1.7 Permissiblevariationsinlengthandquantityorweight
1.4 This international standard was developed in accor-
B
(9.2, 9.4, and Table 1 ),
dance with internationally recognized principles on standard-
4.1.8 Quality and finish (10.4),
ization established in the Decision on Principles for the
4.1.9 Sampling (11.2),
Development of International Standards, Guides and Recom-
4.1.10 Hydrostatic or pneumatic test (14.2),
mendations issued by the World Trade Organization Technical
4.1.11 Inspection (Section 15),
Barriers to Trade (TBT) Committee.
4.1.12 Required reports (Section 17), and
4.1.13 Additions to the specification and supplementary
2. Referenced Documents
requirements, as required.
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2.1 ASTM Standards:
B391 Specification for Niobium and Niobium Alloy Ingots
5. Materials and Manufacture
E8/E8M Test Methods for Tension Testing of Metallic Ma-
5.1 Material covered by this specification shall be made
terials
from ingots that conform to Specification B391 and that are
produced by vacuum or plasma arc melting, vacuum electron-
beam melting, or a combination of these three methods.
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This specification is under the jurisdiction of ASTM Committee B10 on
Reactive and Refractory Metals and Alloys and is the direct responsibility of
5.2 Seamless tubes may be made by any seamless method
Subcommittee B10.03 on Niobium and Tantalum.
that will yield a product meeting the requirements of this
Current edition approved April 1, 2018. Published May 2018. Originally
ɛ1
specification, such as, but not limited to, extrusion of billets
approvedin1989.Lastpreviouseditionapprovedin2009asB394 –09 whichwas
withdrawn January 2018 and reinstated in April 2018. DOI: 10.1520/B0394-18.
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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
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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B394−18
TABLE 1 Permissible Variations in Diameter and Wall Thickness
A
Measured at any Location
Variation in Variation in
Outside Inside Variation in
Nominal Outside Diameter, Diameter, Diameter, Wall Thickness,
B
i
...
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