ASTM B776-01a
(Specification)Standard Specification for Hafnium and Hafnium Alloy Strip, Sheet, and Plate
Standard Specification for Hafnium and Hafnium Alloy Strip, Sheet, and Plate
SCOPE
1.1 This specification covers two grades of hafnium strip, sheet, and plate, one specifically for nuclear applications (Grade R1) and one for commercial applications for alloying (Grade R3).
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 This standard does not purport to address the safety problems, 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: B 776 – 01a
Standard Specification for
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Hafnium and Hafnium Alloy Strip, Sheet, and Plate
This standard is issued under the fixed designation B776; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope product of an 8 h period for final continuous anneal, or to a
single furnace load for final batch anneal.
1.1 This specification covers two grades of hafnium strip,
3.1.4 sponge—a lot shall consist of a single blend produced
sheet, and plate, one specifically for nuclear applications
at one time.
(Grade R1) and one for commercial applications for alloying
3.1.5 weld fittings—definitionistobemutuallyagreedupon
(Grade R3).
between manufacturer and the purchaser.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
4. Classification
information only.
4.1 The strip, sheet, or plate is to be furnished in one of the
1.3 This standard does not purport to address all of the
two grades shown in Table 1.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Ordering Information
priate safety and health practices and determine the applica-
5.1 Purchase orders for material under this specification
bility of regulatory limitations prior to use.
shall include the following information as required to ad-
2. Referenced Documents equately describe the desired material:
5.1.1 Quantity (weight or number of pieces),
2.1 ASTM Standards:
2
5.1.2 Number of material,
E8 TestMethodsforTensionTestingofMetallicMaterials
5.1.3 Form (strip, sheet, plate),
E21 Test Methods for Elevated Temperature Tension Tests
2
5.1.4 Metallurgical condition (6.2),
of Metallic Materials
5.1.5 Finish (Section 11),
E29 Practice for Using Significant Digits in Test Data to
3
5.1.6 Applicable dimensions (thickness, width, and length),
Determine Conformance with Specifications
5.1.7 Grade (Table 1), and
3. Terminology 5.1.8 ASTM designation and year of issue.
3.1 Lot Definitions:
NOTE 1—A typical ordering description is as follows: twenty-eight
3.1.1 castings—a lot shall consist of all castings produced
pieces hafnium plate, annealed; mechanically descaled and pickled; 0.158
in. by 6.000 in. thick by 18-in. long lengths; Grade R1; ASTM
from the same pour.
B776–___.
3.1.2 ingot—no definition required.
3.1.3 rounds, flats, tubes, and wrought powder metallurgical
5.2 In addition to the data specified in 5.1, the following
products (single definition, common to nuclear and non-
optionsandpointsofagreementbetweenthemanufacturerand
nuclear standards)—a lot shall consist of a material of the
the purchaser shall be specified on the purchase order if
samesize,shape,condition,andfinishproducedfromtheingot
required:
or powder blend by the same reduction schedule and the same
5.2.1 Mechanical test temperature (see 8.1),
heat treatment parameters. Unless otherwise agreed between
5.2.2 Tolerances (Section 10),
manufacturer and purchaser, a lot shall be limited to the
5.2.3 Workmanship standards (Section 11),
5.2.4 Special or alternate tests (Sections 8 and 14),
5.2.5 Inspection (Section 16),
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This specification is under the jurisdiction of ASTM Committee B10 on
5.2.6 Corrosion testing (Section 9),
Reactive and Refractory Metals and Alloys and is the direct responsibility of
5.2.7 Zirconium analysis requirements (Table 1), and
Subcommittee B10.02 on Zirconium and Hafnium.
Current edition approved Nov. 10, 2001. Published January 2002. Originally 5.2.8 The isotopic hafnium composition and its analysis, if
published as B776–87. Last previous edition B776–01.
required, shall be mutually agreed upon by the purchaser and
2
Annual Book of ASTM Standards, Vol 03.01.
producer.
3
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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B 776
TABLE 1 Chemical Requirements
8. Mechanical Properties
Composition, weight
8.1 Grade R1 shall conform to the requirements prescribed
Elements
Grade R1 Grade R3
in Table 3 for room temperature mechanical properties. El-
Aluminum 0.010 0.050 evated temperature properties shall be used to determine
Carbon 0.015 0.025
compliance only when specified in the purchase order.
Chromium 0.010 0.050
Copper 0.010 .
9. Corrosion Properties
Hydrogen 0.0025 0.0050
Iron 0.050 0.0750
9.1 When required by the purchaser and stated in the
Molybdenum 0.0020 .
purchase order, the following corrosion testing shall be per-
Nickel 0.0050 .
Niobium 0.010 .
formed:
N
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