ASTM B394-09e1

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Designation:B394 −09
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.
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´ NOTE—Editorial corrections were made throughout in January 2010.
1. Scope 3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1.1 This specification covers wrought niobium and niobium
3.1.1 lot, n—alotshallconsistofallmaterialproducedfrom
alloy seamless and welded tubes as follows:
the same ingot at one time, with the same cross section,
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
processed with the same nominal metallurgical parameters and
1.1.2 R04210-Type 2—Commercial grade unalloyed
heat treated at the same conditions.
niobium,
1.1.3 R04251-Type 3—Reactorgradeniobiumalloycontain-
4. Ordering Information
ing 1 % zirconium, and
4.1 Orders for materials under this specification shall in-
1.1.4 R04261-Type 4—Commercial grade niobium alloy
clude the following information as applicable:
containing 1 % zirconium.
4.1.1 Type and grade (Section 1),
1.2 The values stated in inch-pound units are to be regarded
4.1.2 ASTM designation and year of issue,
as standard. The values given in parentheses are mathematical
4.1.3 Welding (Section 5),
conversions to SI units that are provided for information only
4.1.4 Quantityinweight,numberofpieces,anddimensions,
and are not considered standard.
4.1.5 Chemistry (6.3),
1.3 The following precautionary caveat pertains only to the 4.1.6 Temper designation (Section 8),
test methods portion of this specification. This standard does 4.1.7 Permissiblevariationsinlengthandquantityorweight
B
not purport to address all of the safety concerns, if any, (9.2, 9.4, and Table 1 ),
4.1.8 Quality and finish (10.4),
associated with its use. It is the responsibility of the user of this
4.1.9 Sampling (11.2),
standard to establish appropriate safety and health practices
4.1.10 Hydrostatic or pneumatic test (14.2),
and determine the applicability of regulatory limitations prior
4.1.11 Inspection (Section 15),
to use.
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 Test Methods for Tension Testing of Metallic Materials
5.1 Material covered by this specification shall be made
E29 Practice for Using Significant Digits in Test Data to
from ingots that conform to Specification B391 and that are
Determine Conformance with Specifications
produced by vacuum or plasma arc melting, vacuum electron-
E2626 Guide for Spectrometric Analysis of Reactive and
beam melting, or a combination of these three methods.
Refractory Metals
5.2 Seamless tubes may be made by any seamless method
that will yield a product meeting the requirements of this
specification, such as, but not limited to, extrusion of billets
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This specification is under the jurisdiction of ASTM Committee B10 on
with subsequent cold working by drawing, swaging, or
Reactive and Refractory Metals and Alloys and is the direct responsibility of
Subcommittee B10.03 on Niobium and Tantalum.
pilgering, with intermediate anneals, until the final dimensions
Current edition approved Oct. 1, 2009. Published December 2009. Originally
are reached.
approved in 1989. Last previous edition approved in 2003 as B394 - 03. DOI:
10.1520/B0394-09E01.
5.3 Welded tubing shall be made from flat-rolled products
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
by an automatic or semiautomatic welding process with no
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
additionoffillermetalintheweldingoperation.Othermethods
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ofwelding,suchastheadditionoffillermetalorhandwelding,
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B394−09
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
in. (mm) Over and Over and Over and
C,D
Under, in. Under, in. Under, %
B C
(mm) (mm)
0.187 to 0.625 (4.7 to 15.9), excl 0.004 (0.010) 0.004 (0.010) 10
0.625 to 1.000 (15.9 to 25.4), excl 0.005 (0.13) 0.005 (0.13) 10
1.000 to 2.000 (25.4 to 50.
...