ASTM B392-03
(Specification)Standard Specification for Niobium and Niobium Alloy Bar, Rod, and Wire
Standard Specification for Niobium and Niobium Alloy Bar, Rod, and Wire
ABSTRACT
This specification covers four grades of wrought niobium and niobium alloy bar, rod, and wire as R04200-Type 1, reactor grade unalloyed niobium; R04210-Type 2, commercial grade unalloyed niobium; R04251-Type 3, reactor grade niobium alloy containing 1 % zirconium; and R04261-Type 4, commercial grade niobium alloy containing 1 % zirconium. The chemical; and mechanical properties requirements, such as Brinell hardness, tensile strength, yield strength, and elongations; as well as the temper designations are detailed.
SCOPE
1.1 This specification covers four grades of wrought niobium and niobium alloy bar, rod, and wire as follows: Note-Committee B-10 has adopted "niobium" as the designation for Element No. 41, formerly named "columbium."
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 the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: B392 – 03
Standard Specification for
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Niobium and Niobium Alloy Bar, Rod, and Wire
This standard is issued under the fixed designation B392; 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 3.1.1 lot—a lot shall consist of all material produced from
the same ingot at one time, with the same cross section,
1.1 This specification covers four grades of wrought nio-
processed with the same nominal metallurgical parameters and
bium and niobium alloy bar, rod, and wire as follows:
heat treated at the same conditions.
NOTE 1—Committee B10 has adopted “niobium” as the designation for
3.1.2 bar—material less than 6 in. (152.4 mm) in width and
Element No. 41, formerly named “columbium.”
0.187 in. (4.75 mm) or greater in thickness, with a rectangular
1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,
cross section, supplied in straight lengths.
1.1.2 R04210-Type 2—Commercial grade unalloyed nio-
3.1.3 rod—material 0.125 to 2.50 in. (3.18 to 63.50 mm) in
bium,
diameter, in round, hexagonal, or octagonal cross section
1.1.3 R04251-Type 3—Reactor grade niobium alloy con-
supplied in straight lengths.
taining 1 % zirconium, and
3.1.4 wire—material 0.020 to 0.124 in. (0.51 to 3.15 mm) in
1.1.4 R04261-Type 4—Commercial grade niobium alloy
diameter, furnished in coils or on spools or reels. Material less
containing 1 % zirconium.
than 0.020 in. (0.51 mm) in diameter is not covered by this
1.2 The values stated in inch-pound units are to be regarded
specification.
as the standard. The values given in parentheses are for
4. Ordering Information
information only.
1.3 The following precautionary caveat pertains only to the
4.1 Orders for materials under this specification shall in-
test methods portion of this specification. This standard does
clude the following information as applicable:
not purport to address all of the safety concerns, if any,
4.1.1 Type and grade (Section 1),
associated with its use. It is the responsibility of the user of this
4.1.2 ASTM designation and year of issue,
standard to establish appropriate safety and health practices
4.1.3 Method of manufacture (Section 5),
and determine the applicability of regulatory limitations prior
4.1.4 Temper designation (Section 8),
to use.
4.1.5 Quantityinweight,numberofpieces,anddimensions,
4.1.6 Chemistry (6.3),
2. Referenced Documents
4.1.7 Mechanical properties (Section 7),
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2.1 ASTM Standards:
4.1.8 Condition (8.2),
B391 Specification for Niobium and Niobium Alloy Ingots
4.1.9 Permissible Variations (9.2),
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4.1.10 Permissible overshipments (9.4),
E8 Test Methods for Tension Testing of Metallic Materials
4.1.11 Quality and finish (Section 10),
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4.1.12 Sampling (Section 11),
E29 Practice for Using Significant Digits in Test Data to
4.1.13 Inspection (Section 15),
Determine Conformance with Specifications
4.1.14 Required reports (Section 17), and
4.1.15 Additions to the specification and supplementary
3. Terminology
requirements, as required.
3.1 Definitions of Terms Specific to This Standard: Descrip-
5. Materials and Manufacture
tions of Terms Specific to This Standard:
5.1 Material covered by this specification shall be made
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This specification is under the jurisdiction of ASTM Committee B10 on from ingots that conform to Specification B391 and that are
Reactive and Refractory Metals and Alloys and is the direct responsibility of
produced by vacuum or plasma arc melting, vacuum electron-
Subcommittee B10.03 on Niobium and Tantalum.
beam melting, or a combination of these three methods.
Current edition approved Sept. 10, 2003. Published September 2003. Originally
5.2 The various niobium mill products covered by this
approved in 1989. Last previous edition approved in 1999 as B392 - 99. DOI:
10.1520/B0392-03. specification are formed with the conventional extrusion,
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Annual Book of ASTM Standards, Vol 02.04.
forging, swaging, rolling, and drawing equipment normally
3
Annual Book of ASTM Standards, Vol 03.01.
available in metal working plants.
4
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B392 – 03
TABLE 2 Brinell Hardness
6. Chemical and Hardness Requirements Chemical and
Hardness Requirements Type 1 Type 2 Type 3 Type 4
Maximum average 90 125 125 135
6.1 The niobium and niobium alloy ingots and billets for
Maximum per individual impression 105 150 140 150
conversion to finished products covered by this specification
shall conform to the requirements for chemical composition
...
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