ASTM B391-99
(Specification)Standard Specification for Niobium and Niobium Alloy Ingots
Standard Specification for Niobium and Niobium Alloy Ingots
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. Note-Committee B-10 has adopted "niobium" as the designation for Element No. 41, formerly named "columbium."
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 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 391 – 99
Standard Specification for
Niobium and Niobium Alloy Ingots
This standard is issued under the fixed designation B 391; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.3 Size, diameter and length,
3.1.4 Method of manufacture (Section 4),
1.1 This specification covers unalloyed and alloyed niobium
3.1.5 Chemistry (Section 5),
ingots prepared by vacuum- or plasma-arc melting or electron-
3.1.6 Hardness (Section 6),
beam melting to produce consolidated metal for processing to
3.1.7 Quality and finish (Section 8),
various mill shapes.
3.1.8 Marking (Section 15)
NOTE 1—Committee B-10 has adopted “niobium” as the designation
3.1.9 Packaging (Section 16),
for Element No. 41, formerly named “columbium.”
3.1.10 Required reports (Section 14), and
1.2 The materials covered by this specification are:
3.1.11 Disposition of rejected material (Section 13).
1.2.1 R04200-Type 1—Reactor grade unalloyed niobium,
4. Materials and Manufacture
1.2.2 R04210-Type 2—Commercial grade unalloyed nio-
bium,
4.1 The ingot metal for all four types may be vacuum or
1.2.3 R04251-Type 3—Reactor grade niobium alloy con-
plasma arc melted, vacum electron-beam melted, or any
taining 1 % zirconium, and
combination of these three methods.
1.2.4 R04261-Type 4—Commercial grade niobium alloy
5. Chemical Requirements
containing 1 % zirconium.
1.3 The values stated in inch-pound units are to be regarded
5.1 The finished ingot shall conform to the requirements for
as the standard. The values given in parentheses are for chemical composition as prescribed in Table 1.
information only.
5.2 Analysis for elements not listed in Table 1 and not
1.4 The following precautionary caveat pertains only to the normally expected in niobium shall not be required unless
test method portions of this specification: This standard does
specified at time of purchase.
not purport to address all of the safety concerns, if any,
6. Hardness
associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety and health practices 6.1 The maximum Brinell hardness shall conform to the
and determine the applicability of regulatory limitations prior requirements specified in Table 2.
to use. 6.2 If the hardness test impressions on the ingot side wall
would be detrimental to subsequent fabrication, the hardness
2. Referenced Documents
test requirements may be waived or changed as mutually
2.1 ASTM Standards: agreed upon between the purchaser and the manufacturer.
E 10 Test Method for Brinell Hardness of Metallic Materi-
2 7. Permissible Variations
als
E 29 Practice for Using Significant Digits in Test Data to 7.1 Quantity—For orders requiring up to 100 lb (45.4 kg) of
Determine Conformance with Specifications ingots, the manufacturer may overship up to a maximum of
20 %. For orders up to 1000 lb (454 kg), the manufacturer may
3. Ordering Information
overship up to a maximum of 10 %. The permissible overship-
3.1 Orders for material under this specification shall include
ment shall be negotiated for orders larger than 1000 lb.
the following information as applicable:
8. Quality and Finish
3.1.1 Type (see 1.2),
3.1.2 Quantity in weight or pieces, 8.1 The manufacturer shall use care to have each lot of ingot
material as uniform in quality as possible.
8.2 When specified, the ingots shall be conditioned on the
This specification is under the jurisdiction of ASTM Committee B-10 on
surface to standards agreed upon between the manufacturer and
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.03 on Niobium and Tantalum.
the purchaser.
Current edition approved Nov. 10, 1999. Published January 2000. Originally
8.3 Subsequent fabrication will be permitted. The difference
published as B 391 – 62 T. Last previous edition B 391 – 96.
2 between the maximum and minimum radius of the conditioned
Annual Book of ASTM Standards, Vol 03.01.
ingot shall not exceed 20 % of the maximum radius. Lands,
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 391
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
Molybdenum 0.010 0.020 0.010 0.050
Hafnium 0.02 0.02 0.02 0.02
Titanium 0.02 0.03 0.02 0.03
When Specified:
Boron 2 ppm . 2 ppm .
Aluminum 0.002 0.005 0.002 0.005
Beryllium 0.005 . 0.005 .
Chromium 0.002 . 0.002 .
Cobalt 0.002 . 0.002 .
TABLE 2 Brinell Hardness
truly representative sample, it shall be discarded and a new
samp
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.