ASTM B493-83(1998)
(Specification)Standard Specification for Zirconium and Zirconium Alloy Forgings
Standard Specification for Zirconium and Zirconium Alloy Forgings
SCOPE
1.1 This specification covers three grades of zirconium and zirconium alloy forgings.
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 The following safety hazards caveat pertains only to the test method portion, Section 12, of this specification: This standard does not purport to address all of 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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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 493 – 83 (Reapproved 1998)
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
Zirconium and Zirconium Alloy Forgings
This standard is issued under the fixed designation B 493; 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 the following information:
5.1.1 Quantity (weight and number of pieces),
1.1 This specification covers three grades of zirconium and
5.1.2 Name of material (zirconium forgings),
zirconium alloy forgings.
5.1.3 Finish (Section 9),
1.2 The values stated in inch-pound units are to be regarded
5.1.4 Dimension (diameter, thickness, length, width, or as
as the standard. The values given in parentheses are for
specified in appropriate drawings),
information only.
5.1.5 ASTM designation and year of issue,
1.3 The following safety hazards caveat pertains only to
5.1.6 Grade number (see 3.1), and
the test method portion, Section 12, of this specification: This
5.1.7 Additions to the specification and supplementary re-
standard does not purport to address all of the safety problems,
quirements, if required.
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
NOTE 1—A typical ordering description is as follows: 8000-lb zirco-
practices and determine the applicability of regulatory limita-
nium forgings, mechanically descaled 10 by 12 by 12-in. rectangular bar,
ASTM B 493, dated , Grade R60702.
tions prior to use.
6. Materials and Manufacture
2. Referenced Documents
6.1 The forgings shall be formed with conventional forging
2.1 ASTM Standards:
equipment normally found in primary ferrous and nonferrous
B 614 Practice for Descaling and Cleaning Zirconium and
metal plants.
Zirconium Alloy Surfaces
6.2 Forgings shall be furnished in the annealed conditions.
E 8 Test Methods for Tension Testing of Metallic Materials
E 29 Practice for Using Significant Digits in Test Data to
7. Chemical Composition
Determine Conformance with Specifications
7.1 The material shall conform to the requirements as to
3. Terminology
chemical composition prescribed in Table 1.
7.2 The manufacturer’s ingot analysis shall be considered
3.1 Definitions of Terms Specific to This Standard:
the chemical analysis for forgings, except for hydrogen and
3.1.1 lot—lot shall consist of all material produced from the
nitrogen, which shall be determined on the finished product.
same ingot at one time, with the same cross section, and with
7.3 When requested by the purchaser and stated in the
the same nominal metallurgical parameters.
purchase order, a check analysis for any elements listed in
4. Classification
Table 1 shall be made on the finished product.
7.3.1 The manufacturer’s analysis shall be considered as
4.1 The forgings are furnished in three grades as follows:
verified if the check analysis confirms the manufacturer’s
4.1.1 Grade R60702—Unalloyed zirconium.
reported values within the tolerances prescribed in Table 2.
4.1.2 Grade R60704—Zirconium-tin alloy.
4.1.3 Grade R60705—Zirconium-niobium alloy.
8. Workmanship and Quality Level Requirements
5. Ordering Information
8.1 The material shall be free of injurious imperfections.
Minor surface imperfections may be removed by spot grinding
5.1 Orders for material under this specification shall include
if such grinding does not reduce the dimensions of the finished
1 piece below the minimum permitted by the tolerance for the
This specification is under the jurisdiction of ASTM Committee B-10 on
product.
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.02on Zirconium and Hafnium.
Current edition approved Sept. 30, 1983. Published December 1983. Originally
9. Finish and Appearance
published as B 493 – 69. Last previous edition B 493 – 79.
2 9.1 The forgings shall have one of the following surface
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SB-493 in Section II of that Code. conditions as specified:
Annual Book of ASTM Standards, Vol 02.04.
9.1.1 As forged,
Annual Book of ASTM Standards, Vol 03.01.
9.1.2 Mechanically descaled, or
Annual Book of ASTM Standards, Vol 14.02.
B 493
A
TABLE 1 Chemical Requirements
offset (0.2 %) method. Determine the tensile properties using a
Composition, % strain rate of 0.003 to 0.007 in./in.·min through the yield
strength. After the yield strength has been exceeded, increase
Element UNS Grade Designation
the cross-head speed to approximately 0.05 in./in.·min to
R60702 R60704 R60705
failure.
Zirconium + hafnium, min 99.2 97.5 95.5
12.2 Chemical Tests—Conduct the chemical analysis by the
Hafnium, max 4.5 4.5 4.5
Iron + chromium 0.2 max 0.2 to 0.4 0.2 max
standard techniques normally used by the manufacturer.
Tin . 1.0 to 2.0 .
Hydrogen, max 0.005 0.005 0.005
13. Inspection
Nitrogen, max 0.025 0.025 0.025
Carbon, max 0.05 0.05 0.05
13.1 The manufacturer shall inspect the material covered by
Niobium . . 2.0 to 3.0
this specification prior to shipment and, on request, shall
Oxygen 0.16 0.18 0.18
furnish the purchaser with certificates of test. If so specified in
A
By agreement between the purchaser and the manufacturer, analysis may be
the purchase order,
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