ASTM B391-09e1
(Specification)Standard Specification for Niobium and Niobium Alloy Ingots (Withdrawn 2018)
Standard Specification for Niobium and Niobium Alloy Ingots (Withdrawn 2018)
ABSTRACT
This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill shapes. The materials covered by this specification are R04200-Type 1 which is a reactor grade unalloyed niobium, R04210-Type 2 which is a commercial grade unalloyed niobium, R04251-Type 3 which is a reactor grade niobium alloy, and R04261-Type 4 which is a commercial grade niobium alloy. The ingot metal for all four types shall be vacuum or plasma arc melted, vacuum electron-beam melted, or any combination of these three methods. The materials shall conform to the required chemical composition for carbon, nitrogen, oxygen, hydrogen, zirconium, tantalum, iron, silicon, tungsten, nickel, molybdenum, hafnium, titanium, boron, aluminum, beryllium, chromium, and cobalt. The ingots shall also conform to the required maximum Brinell hardness.
SIGNIFICANCE AND USE
For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following tables, 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 unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill shapes.
1.2 The materials covered by this specification are:
1.2.1 R04200-Type 1—Reactor grade unalloyed niobium,
1.2.2 R04210-Type 2—Commercial grade unalloyed niobium,
1.2.3 R04251-Type 3—Reactor grade niobium alloy containing 1 % zirconium, and
1.2.4 R04261-Type 4—Commercial grade niobium alloy containing 1 % zirconium.
1.3 Unless a single unit is used, 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 The following precautionary caveat pertains only to the test method portions 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.
WITHDRAWN RATIONALE
This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill shapes.
Formerly under the jurisdiction of Committee B10 on Reactive and Refractory Metals and Alloys, this specification was withdrawn in January 2018 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
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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
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Designation:B391 −09
Standard Specification for
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Niobium and Niobium Alloy Ingots
This standard is issued under the fixed designation B391; 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. Ordering Information
1.1 Thisspecificationcoversunalloyedandalloyedniobium 3.1 Orders for material under this specification shall include
ingots prepared by vacuum- or plasma-arc melting or electron- the following information, as applicable:
beam melting to produce consolidated metal for processing to 3.1.1 ASTM standard number and year of issue,
various mill shapes. 3.1.2 Type (see 1.2),
3.1.3 Quantity in weight or pieces,
1.2 The materials covered by this specification are:
3.1.4 Size, diameter and length,
1.2.1 R04200-Type 1—Reactor grade unalloyed niobium,
3.1.5 Chemistry (see 5.2),
1.2.2 R04210-Type 2—Commercial grade unalloyed
3.1.6 Permissible overshipment (see 6.1),
niobium,
3.1.7 Quality and finish (see 7.2 and 7.6),
1.2.3 R04251-Type 3—Reactorgradeniobiumalloycontain-
3.1.8 Sampling (Section 8)
ing 1 % zirconium, and
3.1.9 Packaging (Section 15), and
1.2.4 R04261-Type 4—Commercial grade niobium alloy
3.1.10 Required reports (Section 13).
containing 1 % zirconium.
1.3 Unless a single unit is used, the values stated in
4. Materials and Manufacture
inch-pound units are to be regarded as standard. The values
4.1 The ingot metal for all four types may be vacuum or
given in parentheses are mathematical conversions to SI units
plasma arc melted, vacuum electron-beam melted, or any
that are provided for information only and are not considered
combination of these three methods.
standard.
1.4 The following precautionary caveat pertains only to the
5. Chemical Requirements
test method portions of this specification: This standard does
5.1 The finished ingot shall conform to the requirements for
not purport to address all of the safety concerns, if any,
chemical composition as prescribed in Table 1.
associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety and health practices
5.2 Analysis for elements not listed in Table 1 and not
and determine the applicability of regulatory limitations prior
normally expected in niobium shall not be required unless
to use.
specified at time of purchase.
2. Referenced Documents
6. Permissible Variations
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2.1 ASTM Standards:
6.1 Quantity—For orders requiring up to 100 lb (45.4 kg) of
E29 Practice for Using Significant Digits in Test Data to
ingots, the manufacturer may overship up to a maximum of
Determine Conformance with Specifications
20 %. For orders up to and including 1000 lb (454 kg), the
E2626 Guide for Spectrometric Analysis of Reactive and
manufacturer may overship up to a maximum of 10 %. The
Refractory Metals
permissible overshipment shall be negotiated for orders larger
than 1000 lb (454 kg).
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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
7. Quality and Finish
Subcommittee B10.03 on Niobium and Tantalum.
Current edition approved Oct. 1, 2009. Published December 2009. Originally
7.1 Themanufacturershallusecaretohaveeachlotofingot
approved in 1962. Last previous edition approved in 2003 as B391 – 03. DOI:
material as uniform in quality as possible.
10.1520/B0391-09E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 When specified, the ingots shall be conditioned on the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
surfacetostandardsagreeduponbetweenthemanufacturerand
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the purchaser.
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B391−09
TABLE 1 Chemical Requirements
Type 1 (Reactor Type 2 (Commercial Type 3 (Reactor Type 4 (Commercial
Element Grade Unalloyed Grade Unalloyed Grade Niobium–1 % Grade Niobium–1 %
Niobium) Niobium) Zirconium) Zirconium)
R04200 R04210 R04251 R04261
Max Weight % (Except Where Otherwise Specified)
Each Ingot:
Carbon 0.01 0.01 0.01 0.01
Nitrogen 0.01 0.01 0.01 0.01
Oxygen 0.015 0.025 0.015 0.025
Hydrogen 0.0015 0.0015 0.0015 0.0015
Zirconium 0.02 0.02 0.8 to 1.2 (range) 0.8 to 1.2 (range)
Tantalum 0.1 0.3 0.1 0.5
Iron 0.005 0.01 0.005 0.01
Silicon 0.005 0.005 0.005 0.005
Tungsten 0.03 0.05 0.03 0.05
Nickel 0.005 0.005 0.005 0.005
Molybden
...
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