ASTM B652/B652M-96(1999)
(Specification)Standard Specification for Niobium-Hafnium Alloy Ingots
Standard Specification for Niobium-Hafnium Alloy Ingots
SCOPE
1.1 This specification covers hafnium alloyed niobium ingots prepared by vacuum-arc melting or electron-beam furnace melting, or both, 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)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B 652/B 652M – 96 (Reapproved 1999)
Standard Specification for
Niobium-Hafnium Alloy Ingots
This standard is issued under the fixed designation B 652/B 652M; 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 5. Chemical Composition
1.1 This specification covers hafnium alloyed niobium in- 5.1 The material shall conform to the requirements as to
gots prepared by vacuum-arc melting or electron-beam furnace chemical composition prescribed in Table 1. Analysis for
melting, or both, to produce consolidated metal for processing elements, not listed in Table 1 and not normally expected in
to various mill shapes. niobium hafnium alloy, shall not be required unless specified at
1.2 The material covered by this specification is Grade time of purchase.
R04295, niobium-base alloy containing approximately 10 % 5.2 In the event of dispute over conformity of the material to
hafnium and 1 % titanium. this specification, upon agreement between the purchaser and
1.3 The values stated in either inch-pound or SI units are to the seller as to procedure, representative samples of the
be regarded separately as standard. The values stated in each material may be submitted to a referee for analysis.
system are not exact equivalents; therefore, each system must
6. Permissible Variations in Quantity
be used independently of the other. SI values cannot be mixed
6.1 For orders requiring up to 100 lb [45 kg] of ingots, the
with inch-pound values.
manufacturer may overship up to a maximum of 20 %. For
2. Referenced Documents
orders up to 1000 lb [450 kg], the manufacturer may overship
2.1 ASTM Standards: up to a maximum of 10 %. The permissible overshipment shall
E 29 Practice for Using Significant Digits in Test Data to be negotiated for orders larger than 1000 lb [450 kg].
Determine Conformance with Specifications
7. Workmanship, Finish, and Appearance
3. Ordering Information
7.1 The manufacturer shall use care to have each lot of ingot
3.1 Orders for material under this specification shall include material as uniform in quality as possible.
the following information as applicable: 7.2 When specified, the ingots shall be conditioned on the
3.1.1 General alloy description (see 1.2), surface to standards agreed upon between the purchaser and the
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 Method of manufacture (Section 4), or local depressions that will impair subsequent fabrication will
3.1.5 Chemistry (Section 5), be permitted. The difference between maximum and minimum
3.1.6 Quality and finish (Section 7), radius of the conditioned ingot shall not exceed 5 % of the
3.1.7 Marking (Section 14), maximum radius. Lands, grooves, and local depressions shall
3.1.8 Packaging (Section 15), be blended to a maximum angle of 30° to the axis of the ingot.
3.1.9 Required reports (Section 13), and 7.4 Each ingot should be tested for soundness by nonde-
3.1.10 Disposition of rejected material (Section 11). structive test methods, such as dye penetrant and ultrasonic
tests, as mutually agreed upon between the purchaser and the
4. Materials and Manufacture
manufacturer.
4.1 The ingot metal for this material may be vacuum- or 7.5 Defects in ingots that exceed the acceptance standards
plasma-arc melted, electron-beam melted, or a combination of
shall be removed by cropping or surface conditioning, which-
these methods. ever is appropriate. The manufacturer shall be permitted to
remove surface imperfections provided that after such removal,
the requirements of conditioning are met (7.3).
This specification is under the jurisdiction of ASTM Committee B-10 on
7.6 The ingots shall be free of imperfections that would be
Reactive and Refractory Metals and Alloysand is the direct responsibility of
deemed injurious by the standards of acceptability agreed upon
Subcommittee B10.03on Niobium and Tantalum.
Current edition approved Dec. 10, 1996. Published January 1997. Originally between the purchaser and the manufacturer.
published as B 652 – 79. Last previous edition B 652 – 92.
Annual Book of ASTM
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