ASTM B737-90(2000)
(Specification)Standard Specification for Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire
Standard Specification for Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire
SCOPE
1.1 This specification covers hot- or cold-worked hafnium rod and wire, or both.
1.2 This specification contains two material grades, one specifically for nuclear applications (Grade R1) and one for commercial applications for alloying (Grade R3).
1.3 The products covered include the following:
1.3.1 Rod 3/8 to 1.0 in. (9.5 to 25.4 mm) in diameter.
1.3.2 Wire less than 3/8 in. (9.5 mm) in diameter.
1.4 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.5 This standard does not purport to address the safety problems 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 737 – 90 (Reapproved 2000)
Standard Specification for
Hot-Rolled and/or Cold-Finished Hafnium Rod and Wire
This standard is issued under the fixed designation B 737; 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 4.1.2 Name of material,
4.1.3 Form (rod, wire),
1.1 This specification covers hot- or cold-worked hafnium
4.1.4 Metallurgical condition (Section 6),
rod and wire, or both.
4.1.5 Finish (Section 12),
1.2 This specification contains two material grades, one
4.1.6 Applicable dimensions (diameter and length),
specifically for nuclear applications (Grade R1) and one for
4.1.7 Grade (Table 1), and
commercial applications for alloying (Grade R3).
4.1.8 ASTM designation and year of issue.
1.3 The products covered include the following:
1.3.1 Rod ⁄8to 1.0 in. (9.5 to 25.4 mm) in diameter.
NOTE 1—A typical ordering description is as follows: 500 lb hafnium
1.3.2 Wire less than ⁄8 in. (9.5 mm) in diameter. rod, annealed; mechanically descaled and pickled; 0.375 in. diameter by 6
in. minimum random lengths; Grade R1; ASTM Specification B 737.
1.4 The values stated in inch-pound units are to be regarded
as the standard. The SI units given in parentheses are for
4.2 In addition to the data specified in 4.1, the following
information only.
options and points of agreement between the manufacturer and
1.5 This standard does not purport to address all of the
the purchaser shall be specified on the purchase order if
safety concerns, if any, associated with its use. It is the
required:
responsibility of the user of this standard to establish appro-
4.2.1 Mechanical test temperature (see 8.1),
priate safety and health practices and determine the applica-
4.2.2 Tolerances (Section 10),
bility of regulatory limitations prior to use.
4.2.3 Workmanship standards (Section 13),
4.2.4 Special tests (Section 11),
2. Referenced Documents
4.2.5 Inspection (Section 16),
2.1 ASTM Standards:
4.2.6 Zirconium analysis requirements (Table 1), and
E 8 Test Methods for Tension Testing of Metallic Materials
4.2.7 The isotopic hafnium composition and its analysis, if
E 21 Test Methods for Elevated Temperature Tension Tests
required, shall be mutually agreed upon by the purchaser and
of Metallic Materials
producer.
E 29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications 5. Materials and Manufacture
5.1 Material covered by this specification shall be made by
3. Terminology
conventional hot and cold working procedures, from ingots
3.1 Definitions of Terms Specific to This Standard:
produced by vacuum melting in electron beam or consumable
3.1.1 lot—a lot shall consist of all material of the same mill
arc furnaces, or both, of a type conventionally used for reactive
size, shape, and condition produced from the same ingot by the
metals.
same reduction schedule and the same final heat treating
6. Metallurgical Condition
conditions.
6.1 All grades furnished under this specification shall be in
4. Ordering Information
the recrystallization annealed condition unless otherwise speci-
4.1 Purchase orders for material under this specification
fied.
shall include the following information as required to ad-
7. Chemical Composition
equately describe the desired material:
4.1.1 Quantity (weight or number of pieces),
7.1 The material shall conform to the requirements for
chemical composition as prescribed in Table 1.
7.2 The manufacturer’s ingot analysis shall be considered
This specification is under the jurisdiction of ASTM Committee B10 on
Reactive and Refractory Metals and Alloysand is the direct responsibility of the chemical analysis for material produced to this specifica-
Subcommittee B10.02 on Zirconium and Hafnium.
tion except for hydrogen and nitrogen content which shall be
Current edition approved Dec. 28, 1990. Published February 1991. Originally
determined on the finished product.
published as B 737 – 84. Last previous edition B 737 – 84.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 737
TABLE 1 Chemical Requirements
9.2 Grade R1—Coupons shall exhibit a weight gain of not
Composition, Weight % more than 10 mg/dm .
Alloying 9.3 Grade R3—Test for information only, if required by
Nuclear Grade
Grade
Element purchase order.
Grade R1 Grade R3
10. Permissible Variations in Dimensions
Aluminum 0.010 0.050
Carbon 0.015 0.025
10.1 Rod and wire shall conform to the dimensional require-
Chromium 0.010 0.050
Copper 0.010 .
ments for the specified product as prescribed in Tables 3-5.
Hydrogen 0.0025 0.0050
Iron 0.050 0.0750
11. Special Tests
Molybdenum 0.0020 .
Nickel 0.0050 .
11.1 Additional tests may be specified in the purchase order.
Niobium 0.010 .
The test method and standards shall be agreed upon in advance
Nitrogen 0.010 0.0150
Oxygen 0.040 0.130
between manufacturer and purchaser.
Silicon 0.010 0.050
Tantalum 0.020 .
12. Finish
Tin 0.0050 .
Titanium 0.010 0.050
12.1 Rods shall be furnished with one of the following
Tungsten 0.0150 0.0150
Uranium 0.0010 . surface finishes as designated in the purchase order:
Vanadium 0.0050 .
12.1.1 Mechanically descaled and pickled,
AA
Zirconium
Hafnium balance balance
12.1.2 Centerless ground and pickled, or
A
Zirconium shall be reported. Acceptable levels shall be established by mutual
12.1.3 Centerless ground, pickled, and oxidized.
agreement between purchaser and producer.
12.2 Wire shall be furnished with one of the following
surface finishes as designated in the purchase order:
7.3 Analysis shall be made using the manufacturer’s stan-
dard methods. In the event of disagreement as to the chemical 12.2.1 Conditioned and pickled, or
composition of the metal, methods of chemical analysis for
12.2.2 Conditioned, pickled, and oxidized.
reference purposes shall be determined by a mutually accept-
able laboratory.
13. Workmanship
7.4 Sampling for chemical composition shall consist of
13.1 Cracks, seams, slivers, blisters, burrs, and other inju-
samples taken at top, middle, and bottom of the ingot. Samples
rious imperfections shall not exceed standards of acceptability
for hydrogen and nitrogen shall be taken as two random
agreed upon by the manufacturer and the purchaser.
samples from each lot at final size.
14. Number of Test and Retests
8. Mechanical Properties
8.1 Grade R1 in rod form shall conform to the requirements
14.1 Two random samples shall be taken from each lot.
prescribed in Table 2 for room temperature mechanical prop-
14.2 If any sample or specimen exhibits obvious contami-
erties. Elevated temperature properties shall be used to deter-
nation, improper preparation, or flaws disqualifying it as a
mine compliance only when specified in the purchase order
representative sample, it shall be discarded and a new sample
(see Test Methods E 21).
or specimen substituted.
8.2 The yield strength shall be determined by the offset
14.3 If the results of any test lot are not in conformance with
(0.2 %) method as prescribed in Test Methods E 8.
the requirements of this specification, the
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