ASTM B776-12

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Designation:B776 −12
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope turer and purchaser, a lot shall be limited to the product of an
8 h period for final continuous anneal, or to a single furnace
1.1 This specification covers two grades of wrought haf-
load for final batch anneal.
nium and hafnium alloy strip, sheet, and plate as follows:
1.1.1 Grade R1 for nuclear applications, and 3.2 Forms:
1.1.2 Grade R3 for commercial applications. 3.2.1 strip, n—a flat product, may be supplied in coil, less
than 6 in. (150 mm) in width and from0.005 to0.188in. (0.13
1.2 Unlessasingleunitisused,forexamplecorrosionmass
2 to 4.8 mm) in thickness.
gain in mg/dm , the values stated in either inch-pound or SI
3.2.2 sheet, n—a flat product 6 in. (150 mm) or more in
units are to be regarded separately as standard. The values
width and from 0.005 to 0.188 in. (0.13 to 4.8 mm) in
stated in each system are not exact equivalents; therefore each
thickness.
system must be used independently of the other. SI values
cannot be mixed with inch-pound values.
3.2.3 plate, n—a flat product more than 0.125 in. (3.2 mm)
in thickness.
1.3 The following precautionary caveat pertains only to the
test method portions of this specification. This standard does
4. Classification
not purport to address all of the safety concerns, if any,
4.1 Thestrip,sheet,orplateistobefurnishedintwogrades
associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety and health practices as follows:
4.1.1 Grade R1 (Nuclear) — Unalloyed.
and determine the applicability of regulatory limitations prior
to use. 4.1.2 Grade R3 (Commercial) — Unalloyed.
5. Ordering Information
2. Referenced Documents
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5.1 Purchase orders for materials under this specification
2.1 ASTM Standards:
shall include the following information as applicable:
E8Test Methods for Tension Testing of Metallic Materials
5.1.1 Quantity (weight or number of pieces),
E21TestMethodsforElevatedTemperatureTensionTestsof
5.1.2 Form (3.2) and dimensions,
Metallic Materials
5.1.3 Grade (4.1),
E29Practice for Using Significant Digits in Test Data to
5.1.4 Lot definition for continuous anneal, if applicable
Determine Conformance with Specifications
(3.1),
5.1.5 Metallurgical condition, if not in the recrystallized
3. Terminology
annealed condition (6.3),
3.1 Lot Definition:
5.1.6 Chemical analysis of elements not listed (7.1.3),
3.1.1 lot,n—alotshallconsistofamaterialofthesamesize,
5.1.7 Product analysis (7.1.1.1 and 7.1.3),
shape, condition, and finish produced from the same ingot by
5.1.8 Tensile test temperatures (8.1),
the same reduction schedule and the same heat treatment
5.1.9 Mechanical properties, for Grade R3 (8.1),
parameters. Unless otherwise agreed upon between manufac-
5.1.10 Corrosion properties and testing, (9.1 and 9.1.3),
5.1.11 Material condition and finish (12.1 – 12.5),
5.1.12 Workmanship standards and methods of inspection
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This specification is under the jurisdiction of ASTM Committee B10 on
(Section 13),
Reactive and Refractory Metals and Alloys and is the direct responsibility of
Subcommittee B10.02 on Zirconium and Hafnium.
5.1.13 Purchaser inspection (16.1),
Current edition approved Nov. 1, 2012. Published December 2012. Originally
5.1.14 Rejection and referee (17.2),
approved in 1987. Last previous edition approved in 2007 as B776–07. DOI:
5.1.15 Certification report (Section 18),
10.1520/B0776-12.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5.1.16 Product marking (Section 19), and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.17 Packaging and package marking (Section 20).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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B776−12
NOTE 1—A typical ordering description is as follows: twenty-eight TABLE 2 Check Analyses Limits
pieces hafnium plate, annealed; mechanically descaled and pickled; 0.158
Element Variations Under Min. or
by 6.000 in. thick by 18-in. long lengths; Grade R1; ASTM B776–07.
Over Max. %
Hydrogen 0.002
Nitrogen 0.01
6. Materials and Manufacture
Carbon 0.01
6.1 Material covered by this specification shall be made Zirconium 0.02
Iron and Chromium 0.025
from ingots that are produced by vacuum or plasma arc
Ti
...