ASTM B652/B652M-04
(Specification)Standard Specification for Niobium-Hafnium Alloy Ingots
Standard Specification for Niobium-Hafnium Alloy Ingots
ABSTRACT
This specification covers hafnium alloyed niobium ingots prepared by vacuum- or plasma- arc melting or electron-beam furnace melting, or a combination of these methods, to produce consolidated metal for processing to various mill shapes. The material shall conform to the required chemical composition prescribed. Each ingot should be tested for soundness by non-destructive test methods, such as dye penetrant and ultrasonic testing. Each ingot shall be tested for chemical composition in at least three positions along the length of the ingot.
SCOPE
1.1 This specification covers hafnium alloyed niobium ingots prepared by vacuum- or plasma- arc melting or electron-beam furnace melting, or a combination of these methods, to produce consolidated metal for processing to various mill shapes.
1.2 The material covered by this specification is Grade R04295, niobium-base alloy containing approximately 10 % hafnium and 1 % titanium.
1.3 The values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. SI values cannot be mixed with inch-pound values.
General Information
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Standards Content (Sample)
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Designation: B652/B652M – 04
Standard Specification for
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Niobium-Hafnium Alloy Ingots
This standard is issued under the fixed designation B652/B652M; 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 3.1.8 Disposition of rejected material (Section 11).
1.1 This specification covers hafnium alloyed niobium in-
4. Materials and Manufacture
gots prepared by vacuum- or plasma- arc melting or electron-
4.1 The ingot metal for this material may be vacuum- or
beam furnace melting, or a combination of these methods, to
plasma-arc melted, electron-beam melted, or a combination of
produce consolidated metal for processing to various mill
these methods.
shapes.
1.2 The material covered by this specification is Grade
5. Chemical Composition
R04295, niobium-base alloy containing approximately 10 %
5.1 The material shall conform to the requirements as to
hafnium and 1 % titanium.
chemical composition prescribed in Table 1. Analysis for
1.3 The values stated in either inch-pound or SI units are to
elements, not listed in Table 1 and not normally expected in
be regarded separately as standard. The values stated in each
niobium hafnium alloy, shall not be required unless specified at
system are not exact equivalents; therefore, each system must
time of purchase.
be used independently of the other. SI values cannot be mixed
with inch-pound values.
6. Permissible Variations in Quantity
6.1 For orders requiring up to 100 lb [45 kg] of ingots, the
2. Referenced Documents
2 manufacturer may overship up to a maximum of 20 %. For
2.1 ASTM Standards:
orders up to 1000 lb [450 kg], the manufacturer may overship
E29 Practice for Using Significant Digits in Test Data to
up to a maximum of 10 %. The permissible overshipment shall
Determine Conformance with Specifications
be negotiated for orders larger than 1000 lb [450 kg].
3. Ordering Information
7. Workmanship, Finish, and Appearance
3.1 Orders for material under this specification shall include
7.1 Themanufacturershallusecaretohaveeachlotofingot
the following information as applicable:
material as uniform in quality as possible.
3.1.1 General alloy description (see 1.2) and ASTM desig-
7.2 When specified, the ingots shall be conditioned on the
nation and year of issue,
surfacetostandardsagreeduponbetweenthepurchaserandthe
3.1.2 Quantity in weight or pieces,
manufacturer.
3.1.3 Size: diameter and length,
7.3 In the conditioned ingot, no abrupt changes in diameter
3.1.4 Chemistry (Section 5),
orlocaldepressionsthatwillimpairsubsequentfabricationwill
3.1.5 Quality and finish (see 7.2, 7.4, and 7.6),
be permitted. The difference between maximum and minimum
3.1.6 Certifications and Reports (Section 13),
radius of the conditioned ingot shall not exceed 5 % of the
3.1.7 Packaging (Section 15), and
maximum radius. Lands, grooves, and local depressions shall
be blended to a maximum angle of 30° to the axis of the ingot.
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This specification is under the jurisdiction of ASTM Committee B10 on
7.4 Each ingot should be tested for soundness by nonde-
Reactive and Refractory Metals and Alloys and is the direct responsibility of
structive test methods, such as dye penetrant and ultrasonic
Subcommittee B10.03 on Niobium and Tantalum.
tests, as mutually agreed upon between the purchaser and the
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1979. Last previous edition approved in 1996 as B652/ manufacturer.
B652M – 96 (1999). DOI: 10.1520/B0652_B0652M-04.
7.5 Defects in ingots that exceed the acceptance standards
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall be removed by cropping or surface conditioning, which-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ever is appropriate. The manufacturer shall be permitted to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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B652/B652M – 04
TABLE 1 Chemical Requirements (Ingot)
11. Rejection
Niobium-Hafnium Alloy Grade R04295
11.1 Material that fails to conform to the requirements of
Content, Maximum Weight % (Except
this specification may be rejected. Rejection shall be reported
Element
forHfandTi)
to the producer or supplier promptly and in writing. In case of
Carbon 0.015
dissatisfaction with the results of the tests, the producer or
Oxygen 0.025
supplier may make claim for a rehearing.
Nitrogen 0.010
Hydrogen 0.0015
12. Rehearing
Hafn
...
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