ASTM B495-90(2000)
(Specification)Standard Specification for Zirconium and Zirconium Alloy Ingots
Standard Specification for Zirconium and Zirconium Alloy Ingots
SCOPE
1.1 This specification covers four grades of zirconium ingots.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.3 The following precautionary caveat pertains only to the test method portion, Section 10, of this specification: This standard does not purport to address all 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 495 – 90 (Reapproved 2000)
Standard Specification for
Zirconium and Zirconium Alloy Ingots
This standard is issued under the fixed designation B 495; 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 4.1.5 Finish (Section 7), and
4.1.6 Additions to the specification and supplementary re-
1.1 This specification covers four grades of zirconium
quirements, if required.
ingots.
1.2 The values stated in inch-pound units are to be regarded
NOTE 1—A typical ordering description is as follows: 10 000-lb
as the standard. The SI units given in parentheses are for
zirconium ingot, machine conditioned, ASTM B495, dated __, Grade
R60702.
information only.
1.3 The following precautionary caveat pertains only to the
5. Materials and Manufacture
test method portion, Section 9, of this specification: This
5.1 The ingots covered by this specification shall be manu-
standard does not purport to address all of the safety concerns,
factured by electron beam, vacuum, or inert atmosphere
if any, associated with its use. It is the responsibility of the user
melting in furnaces conventionally used for reactive metals.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
6. Chemical Composition
tions prior to use.
6.1 The material shall conform to the requirements as to
2. Referenced Documents
chemical composition prescribed in Table 1.
6.2 When requested by the purchaser, a check analysis shall
2.1 ASTM Standards:
be performed for any elements listed in Table 1.
E 29 Practice for Using Significant Digits in Test Data to
6.2.1 The manufacturer’s analysis shall be considered as
Determine Conformance with Specifications
verified if the check analysis confirms the manufacturer’s
E 114 Practice for Ultrasonic Pulse-Echo Straight-Beam
reported values within the tolerances prescribed in Table 2.
Examination by the Contact Method
7. Workmanship, Finish, and Appearance
3. Classification
7.1 Ingots shall be conditioned by machining, grinding, or
3.1 The ingots are furnished in five grades as follows:
surface fusion to remove gross surface and subsurface defects
3.1.1 Grade R60702— Unalloyed zirconium.
detrimental to subsequent fabrication.
3.1.2 Grade R60703— Unalloyed zirconium, metallurgical
7.2 After conditioning has been completed, no abrupt
grade.
changes in diameter or local depressions that will impair
3.1.3 Grade R60704— Zirconium-tin alloy.
subsequent fabrication shall be permitted. The difference
3.1.4 Grade R60705— Zirconium-niobium alloy.
between the maximum and minimum radii of the conditioned
3.1.5 Grade R60706— Zirconium-niobium alloy.
ingot shall not exceed 20 % of the maximum radius, except
4. Ordering Information
within 6 in. (150 mm) of the ends of the ingot where rounding
is permissible. Lands, grooves, and local depressions shall be
4.1 Orders for materials under this specification shall in-
blended to a maximum angle of 30° to the axis of the ingot.
clude the following information:
Each end of the ingot shall be chamfered or radiused. The
4.1.1 Quantity (weight),
minimum chamfer or radius shall be ⁄2 in. (12.7 mm).
4.1.2 Name of material (zirconium ingot),
4.1.3 Grade number (Section 3),
8. Number of Tests and Retests
4.1.4 ASTM designation and year of issue,
8.1 At least one sample from the top, middle, and bottom of
each ingot shall be analyzed chemically.
8.2 An ultrasonic test shall be conducted on each ingot.
This specification is under the jurisdiction of ASTM Committee B10 on
8.3 Retests:
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.02 on Zirconium and Hafnium.
8.3.1 If any sample or specimen exhibits obvious contami-
Current edition approved Dec. 28, 1990. Published February 1991. Originally
nation, improper preparation, or flaws disqualifying it as a
published as B 495–69. Last previous edition B 495–79 (1984).
2 representative sample, it should be discarded and a new sample
Annual Book of ASTM Standards, Vol 14.02.
Annual Book of ASTM Standards, Vol 03.03. or specimen substituted.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 495
A
TABLE 1 Chemical Requirements
Composition, %
Element UNS Grade Designation
R60702 R60703 R60704 R60705 R60706
Zirconium + hafnium, 99.2 98.0 97.5 95.5 95.5
min
Hafnium, max 4.5 4.5 4.5 4.5 4.5
Iron + chromium 0.20 max . 0.20 to 0.40 0.2 max 0.2 max
Tin . . 1.00 to 2.00 . .
Hydrogen, max 0.004 . 0.005 0.005 0.005
Nitrogen, max 0.020 . 0.025 0.025 0.025
Carbon, max 0.05 . 0.050 0.050 0.050
Niobium . . . 2.0 to 3.0 2.0 to 3.0
Oxygen, max 0.16 . 0.18 0.18 0.16
A
By agreement between the purchaser and the manufacturer, analysis may be acquired and limits established for elements and compounds not specified in the table
of chemical compositions.
TABLE 2 Permissible Variation in Check Analysis Between
continue testing. A maximum of 10° of the length of the ingot
Different Laboratories
may consist of nonparallel sides such that the back reflection is
Permissible Variation
not at least 50 %, provided each increment is not more than 3
Element
in Check Analysis, %
in. (75 mm) in length and each increment is separated by an
Hydrogen 0.005
increment at least 3 in. long in which the back reflection is a
Nitrogen 0.01
minimum of 50 % when calibrated in accordance with 9.1.1.
Carbon 0.02
Hafnium 0.1
9.2 Chemical Tests— Conduct the chemical analysis by the
Iron + chromium 0.03
standard techniques normally used by the manufacturer.
Tin 0.05
Niobium 0.05
...
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