ASTM B776-06

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Designation: B 776 – 06
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 manufacturer and purchaser, a lot shall be limited to the
product of an 8 h period for final continuous anneal, or to a
1.1 This specification covers two grades of wrought
single furnace load for final batch anneal.
hafnium and hafnium alloy strip, sheet, and plate as follows:
3.2 Forms:
1.1.1 Grade R1 for nuclear applications, and
3.2.1 strip, n—a flat product, may be supplied in coil, less
1.1.2 Grade R3 for commercial applications.
than 6 in. (150 mm) in width and from0.005to 0.188 in. (0.13
1.2 Unlessasingleunitisused,forexamplecorrosionmass
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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
3.2.3 plate, n—a flat product more than 0.188 in. (4.8 mm)
cannot be mixed with inch-pound values.
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
as follows:
standard to establish appropriate safety and health practices
4.1.1 Grade R1 (Nuclear) — Unalloyed.
and determine the applicability of regulatory limitations prior
4.1.2 Grade R3 (Commercial) — Unalloyed.
to use.
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:
E8 Test Methods for Tension Testing of Metallic Materials
5.1.1 Quantity (weight or number of pieces),
E21 Test Methods for Elevated Temperature Tension Tests
5.1.2 Form (3.2) and dimensions,
of Metallic Materials
5.1.3 Grade (4.1),
E29 Practice for Using Significant Digits in Test Data to
5.1.4 Lot definition for continuous anneal, if applicable
Determine Conformance with Specifications
(3.1),
3. Terminology 5.1.5 Metallurgical condition, if not in the recrystallized
annealed condition (6.3),
3.1 Lot Definitions—a lot shall consist of a material of the
5.1.6 Chemical analysis of elements not listed (7.1.3),
samesize,shape,condition,andfinishproducedfromtheingot
5.1.7 Product analysis (7.1.1.1 and 7.1.3),
or powder blend by the same reduction schedule and the same
5.1.8 Tensile test temperatures (8.1),
heat treatment parameters. Unless otherwise agreed between
5.1.9 Mechanical properties, for Grade R3 (8.1),
5.1.10 Corrosion properties and testing, (9.1 and 9.1.3),
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This specification is under the jurisdiction of ASTM Committee B10 on 5.1.11 Material condition and finish (12.1-12.5),
Reactive and Refractory Metals and Alloys and is the direct responsibility of
5.1.12 Workmanship standards and methods of inspection
Subcommittee B10.02 on Zirconium and Hafnium.
(Section 13),
Current edition approved Sept. 1, 2006. Published September 2006. Originally
5.1.13 Purchaser inspection (16.1),
approved in 1987. Last previous edition approved in 2001 as B776–01a.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.14 Rejection and referee (17.2),
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.15 Certification report (Section 18),
Standards volume information, refer to the standard’s Document Summary page on
5.1.16 Product marking (Section 19), and
the ASTM website.
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B776–06
TABLE 2 Check Analyses Limits
5.1.17 Packaging and package marking (Section 20).
Element Variations Under Min. or Over Max. %
NOTE 1—A typical ordering description is as follows: twenty-eight
Hydrogen 0.002
pieces hafnium plate, annealed; mechanically descaled and pickled; 0.158
Nitrogen 0.01
by 6.000 in. thick by 18-in. long lengths; Grade R1; ASTM B776–01.
Carbon 0.01
Zirconium 0.02
6. Materials and Manufacture
Iron and Chromium 0.025
Tin 0.05
6.1 Material covered by this specification shall be made
Niobium 0.05
from ingots that are produced by vacuum or plasma
...