ASTM B776-91(1995)

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.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 77.150.10 - Aluminium products
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.02 - Zirconium and Hafnium

Relations

• Replaced By: ASTM B776-01 - Standard Specification for Hafnium and Hafnium Alloy Strip, Sheet, and Plate
• Effective Date: 10-Nov-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: B 776 – 91 (Reapproved 1995)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Hafnium and Hafnium Alloy Strip, Sheet, and Plate
This standard is issued under the fixed designation B 776; 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.
TABLE 1 Chemical Requirements
1. Scope
Composition, weight
1.1 This specification covers two grades of hafnium strip,
Elements
Grade R1 Grade R3
sheet, and plate, one specifically for nuclear applications
(Grade R1) and one for commercial applications for alloying Aluminum 0.010 0.050
Carbon 0.015 0.025
(Grade R3).
Chromium 0.010 0.050
1.2 The values stated in inch-pound units are to be regarded
Copper 0.010 .
as the standard. The values given in parentheses are for Hydrogen 0.0025 0.0050
Iron 0.050† 0.0750
information only.
Molybdenum 0.0020 .
1.3 This standard does not purport to address all of the
Nickel 0.0050 .
safety concerns, if any, associated with its use. It is the Niobium 0.010 .
Nitrogen 0.010 0.015
responsibility of the user of this standard to establish appro-
Oxygen 0.040 0.130
priate safety and health practices and determine the applica-
Silicon 0.010 0.050
bility of regulatory limitations prior to use. Tantalum 0.020 .
Tin 0.0050 .
Titanium 0.010 0.050
2. Referenced Documents
Tungsten 0.0150 0.0150
2.1 ASTM Standards: Uranium 0.0010 .
2 Vanadium 0.0050 .
E 8 Test Methods for Tension Testing of Metallic Materials
AA
Zirconium
E 21 Test Methods for Elevated Temperature Tension Tests
Hafnium balance balance
of Metallic Materials A
Zirconium shall be reported. Acceptable levels shall be established by mutual
E 29 Practice for Using Significant Digits in Test Data to
agreement between purchaser and producer.
† Editorially corrected.
Determine Conformance with Specifications
5.1.2 Number of material,
3. Terminology
5.1.3 Form (strip, sheet, plate),
3.1 Definitions of Terms Specific to This Standard:
5.1.4 Metallurgical condition (6.2),
3.1.1 lot—a lot shall consist of all material of the same mill
5.1.5 Finish (Section 11),
thickness, shape, and condition produced from the same ingot
5.1.6 Applicable dimensions (thickness, width, and length),
by the same reduction schedule and the same final heat-treating
5.1.7 Grade (Table 1), and
conditions.
5.1.8 ASTM designation and year of issue.
NOTE 1—A typical ordering description is as follows: twenty-eight
4. Classification
pieces hafnium plate, annealed; mechanically descaled and pickled; 0.158
4.1 The strip, sheet, or plate is to be furnished in one of the
in. by 6.000 in. thick by 18-in. long lengths; Grade R1; ASTM B776– ___.
two grades shown in Table 1.
5.2 In addition to the data specified in 5.1, the following
options and points of agreement between the manufacturer and
5. Ordering Information
the purchaser shall be specified on the purchase order if
5.1 Purchase orders for material under this specification
required:
shall include the following information as required to ad-
5.2.1 Mechanical test temperature (see 8.1),
equately describe the desired material:
5.2.2 Tolerances (Section 10),
5.1.1 Quantity (weight or number of pieces),
5.2.3 Workmanship standards (Section 11),
5.2.4 Special or alternate tests (Sections 8 and 14),
1 5.2.5 Inspection (Section 16),
This specification is under the jurisdiction of ASTM Committee B-10 on
Reactive and Refractory Metals and Alloysand is the direct responsibility of 5.2.6 Corrosion testing (Section 9),
Subcommittee B10.02 on Zirconium and Hafnium.
5.2.7 Zirconium analysis requirements (Table 1), and
Current edition approved July 26, 1991. Published November 1991. Originally
5.2.8 The isotopic hafnium composition and its analysis, if
published as B 776 – 87. Last previous edition B 776 – 90.
required, shall be mutually agreed upon by the purchaser and
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 14.02. producer.
B 776
TABLE 3 Mechanical Properties
6. Materials and Manufacture
Tensile Yield Elongation,
6.1 The sheet, strip, or plate covered by this specification
Strength, Strength, (min %)
Test
shall be formed with conventional forging and rolling equip-
Grade Condition min ksi min ksi in
Temperature
(MPa) (MPa) 2 in.
ment found in primary ferrous and nonferrous metal plants, and
(50 mm)
made from ingots produced by vacuum melting in electron
Longitudinal:
beam or consumable arc furnaces, or both, of a type conven-
R1 annealed RT 58 (400) 22 (151) 20
tionally used for reactive metals.
annealed 600°F (316°C) 25 (172) 11 (83) 25
6.2 The sheet, strip, and plate shall be supplied in the
Transverse:
R1 annealed RT 45 (310) 25 (172) 25
recrystallized annealed condition unless otherwise specified.
annealed 600°F (316°C) 23 (158) 14 (96) 35
7. Chemical Compositions
TABLE 4 Permissible Variation in Thickness of Cold-Rolled
7.1 The material shall conform to the chemical composition
A
Hafnium Sheet
requirements prescribed in Table 1.
Permissible Variations In
7.2 The manufacturer’s ingot analysis shall be considered
Specified Thickness, in.
Thickness, 6 in.
the chemical analysis for sheet, strip, and plate, except for
0.146 – 0.1875, excl 0.007
hydrogen and nitrogen, which shall be determined on the
0.131 – 0.145 0.006
finished product.
0.115 – 0.130 0.005
7.3 When requested by the purchaser and stated in the 0.099 – 0.114 0.0045
0.084 – 0.098 0.004
purchase order, a product analysis for any elements listed in
0.073 – 0.083 0.0035
Table 1 shall be made on the finished product.
0.059 – 0.072 0.003
7.3.1 The manufacturer’s analysis shall be considered as 0.041 – 0.058 0.0025
0.027 – 0.040 0.002
verified if the check analysis confirms the manufacturer’s
0.017 – 0.026 0.0015
reported values within the tolerances prescribed in Table 2.
0.008 – 0.016 0.001
0.006 – 0.007 0.0008
8. Mechanical Properties 0.005 0.0005
A 3
Thickness measurements are taken at least ⁄8 in. from edge.
8.1 Grade R1 shall conform to the requirements prescribed
in Table 3 for room temperature mechanical properties. El-
TABLE 5 Permissible Variations in Thickness of Hot-Rolled
evated temperature properties shall be used to determine
Hafnium Strip
compliance only when specified in the purchase order.
Variations from specified thickness
Specified width, in. for widths, given, over and under,
9. Corrosion Properties
A
in.
9.1 When required by the purchaser and stated in the
3 – 18, incl + 0.01, − 0
A 3
purchase order, the following corrosion testing shall be per-
Thickness measurements shall be taken ⁄8 in. from edge. Tolerances do not
include crown.
formed:
9.1.1 Two samples chosen at random from each lot shall be
corrosion tested in water at 680°F (360°C), 2690 psi for
10.1.3 Cold-rolled strip, Table 6.
672+8−0 h using the manufacturer’s standard procedure.
10.2 Width and Length—The variation in width and length
9.1.2 Grade R1—Coupons shall exhibit a weight gain of not
are given in the following tables:
more than 10 mg/dm .
10.2.1 Hot- and cold-rolled sheet, Table 7 and Table 8.
9.1.3 Grade R3 will be tested for information only, if
10.2.2 Hot-rolled strip, Table 9.
required by purchase order.
10.2.3 Cold-rolled strip, Table 10.
10.3 Crown Tolerances—The variations in crown tolerances
10. Permissible Variations in Dimensions
are given in the following tables:
10.1 Thickness—The variation in thickness of strip, sheet,
10.3.1 Hot-rolled strip, Table 11.
and plate are given in the following tables:
10.3.2 Cold-rolled strip, Table 12.
10.1.1 Cold-rolled sheet, Table 4.
10.4 Camber Tolerances—The variations in camber toler-
10.1.2 Hot-rolled strip, Table 5,
ances are given in the following tables:
10.4.1 Hot- and cold-rolled sheet, Table 13.
TABLE 2 Permissible Variation in Check Analysis Between
10.4.2 Hot- and cold-rolled strip, Table 14.
Different Laboratories
10.4.3 Plate, Table 15.
Element Permissible Variation in Product
10.5 Flatness tolerances permissible for plate are given in
Analysis, %
Table 16.
Hydrogen 0.002
Nitrogen 0.01
11. Workmanship, Finish, and Appearance
Carbon 0.01
Zirconium 0.02
11.1 Cracks, seams, slivers, blisters, burrs, and other inju-
Iron and Chromium 0.025
rious imperfections shall not exceed standards of acceptability
Tin 0.05
Niobium 0.05
agreed upon by the manufacturer and the purchaser.
Oxygen 0.02
11.2 Flat-rolled product in the hot-rolled condition shall be
B 776
TABLE 6 Permissible Variations in Thickness of Cold-Rolled Hafnium Strip
NOTE 1—For thickness under 0.010 in. in width to 18 in., a tolerance of 6 10 % of the thickness shall apply.
NOTE 2—Thickness measurements shall be taken ⁄8 in. in from edge of the strip, except on widths less than 1 in., where the tolerances are applicable
for measurements at all locations.
Permissible variations in thickness, for widths given, 6 in.
Over 12 to 18
Specified Thickness, in. 3
⁄16 incl to 1, 1 to 3 in., 3 to 6 in., Over 6 to 9 in., Over 9 to 12 in.,
in.,
excl excl excl incl incl
incl
Under ⁄16 – 0.161, incl 0.002 0.003 0.004 0.004 0.004 0.005
0.160–0.100, incl 0.002 0.002 0.003 0.004 0.004 0.004
0.099–0.069, incl 0.002 0.002 0.003 0.003 0.003 0.004
0.068–0.050, incl 0.002 0.002 0.003 0.003 0.003 0.003
0.049–0.040, incl 0.002 0.002 0.0025 0.003 0.003 0.003
0.039–0.035, incl 0.002 0.002 0.0025 0.003 0.003 0.003
0.034–0.029 incl 0.0015 0.015 0.002 0.0025 0.0025 0.0025
0.028–0.026, incl 0.001 0.015 0.0015 0.002 0.002 0.002
0.025–0.020, incl 0.001 0.001 0.0015 0.002 0.002 0.002
0.019–0.017, incl 0.001 0.001 0.001 0.0015 0.0015 0.002
0.016–0.013, incl 0.001 0.001 0.001 0.0015 0.0015 0.0015
0.012 0.001 0.001 0.001 0.001 0.0015 0.0015
0.011 0.001 0.001 0.001 0.001 0.001 0.0015
0.010 0.001 0.001 0.001 0.001 0.001 0.001
TABLE 7 Permissible Var
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