ASTM B752-06(2011)e1
(Specification)Standard Specification for Castings, Zirconium-Base, Corrosion Resistant, for General Application
Standard Specification for Castings, Zirconium-Base, Corrosion Resistant, for General Application
ABSTRACT
This specification covers zirconium and zirconium-alloy castings for general corrosion-resistant and industrial applications. Material for this specification shall be melted by conventional processes used for reactive metals. Typical methods include the consumable electrode and inductoslag melting processes. The material shall conform to the required chemical composition for zirconium, hafnium, iron, chromium, hydrogen, nitrogen, carbon, oxygen, phosphorus, tin, and niobium. Product analysis and heat treatment shall be performed on the material, and shall conform within the specified check analysis tolerances.
SCOPE
1.1 This specification covers zirconium and zirconium-alloy castings for general corrosion-resistant and industrial applications.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B752 – 06 (Reapproved 2011)
Standard Specification for
Castings, Zirconium-Base, Corrosion Resistant, for General
Application
This standard is issued under the fixed designation B752; 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 (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Method E 142 was removed editorially from Section 2 and X1.1.2 was corrected in April 2011.
1. Scope 3.2.1 castings, n—alotshallconsistofallcastingsproduced
from the same pour.
1.1 Thisspecificationcoverszirconiumandzirconium-alloy
castings for general corrosion-resistant and industrial applica-
4. Ordering Information
tions.
4.1 Orders for castings to this specification shall include the
1.2 The values stated in inch-pound units are to be regarded
following, as required to describe the requirements adequately.
as standard. The values given in parentheses are mathematical
4.1.1 Description of the castings by pattern number or
conversions to SI units that are provided for information only
drawing (dimensional tolerances shall be included on the
and are not considered standard.
casting drawing),
2. Referenced Documents 4.1.2 Quantity,
4.1.3 Grade Designation (see Table 1),
2.1 ASTM Standards:
4.1.4 Options in the specification, and
A802/A802M Practice for Steel Castings, Surface Accep-
4.1.5 Supplementary requirements desired, including the
tance Standards, Visual Examination
standards of acceptance.
E8 Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness of Metallic Materials
5. Materials and Manufacture
E18 Test Methods for Rockwell Hardness of Metallic Ma-
5.1 Material for this specification shall be melted by con-
terials
ventional processes used for reactive metals. Typical methods
E23 Test Methods for Notched Bar Impact Testing of
include the consumable electrode and inductoslag melting
Metallic Materials
processes.
E94 Guide for Radiographic Examination
E165 PracticeforLiquidPenetrantExaminationforGeneral
6. Chemical Composition
Industry
6.1 Pour Analysis—An analysis of each pour shall be made
E446 Reference Radiographs for Steel Castings Up to 2 in.
by the producer from a sample such as a casting or test bar that
(50.8 mm) in Thickness
is representative of the pour. The chemical composition deter-
mined shall conform to the requirements specified for the
3. Terminology
relevant grade in Table 1.
3.1 Definitions of Terms Specific to This Standard:
6.1.1 The elements listed in Table 1 are intentional alloying
3.1.1 pour, n—shall consist of all material melted and cast
additions of elements which are inherent to the manufacture of
at one time.
primaryzirconium,zirconiumsponge,millproductorcastings.
3.2 Lot Definitions:
6.1.1.1 Elements other than those listed in Table 1 are
deemed to be capable of occurring in the grades listed in Table
This specification is under the jurisdiction of ASTM Committee B10 on
1 by and only by way of unregulated or unanalyzed scrap
Reactive and Refractory Metals and Alloys and is the direct responsibility of
additions to the pour.Therefore, pour analysis for elements not
Subcommittee B10.02 on Zirconium and Hafnium.
listedinTable1shallbeconsideredtobeinexcessoftheintent
Current edition approved April 1, 2011. Published April 2011. Originally
of this specification.
approved in 1985. Last previous edition approved in 2006 as B752 – 06. DOI:
10.1520/B0752-06R11E01.
6.2 When agreed upon by producer and purchaser and
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
requested by the purchaser in his written purchase order,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
chemical analysis shall be completed for specific residual
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. elements not listed in this specification.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B752 – 06 (2011)
A
TABLE 1 Chemical Requirements
cooled in air or in the furnace to ambient temperature unless
Grade Designation, otherwise agreed upon between the purchaser and producer.
Composition, %
702C 704C 705C
8. Workmanship, Finish and Appearance
Zirconium and hafnium, 98.8 97.1 95.1
8.1 Allcastingsshallbemadeinaworkmanlikemannerand
min.
shall conform to the dimensions in drawings furnished by the
Hafnium, max 4.5 4.5 4.5
Iron and chro- 0.3 0.3 0.3 purchaser before manufacturing is started. If the pattern is
mium, max
supplied by the purchaser, the dimensions of the casting shall
Hydrogen, max 0.005 0.005 0.005
be as predicted by the pattern.
Nitrogen, max 0.03 0.03 0.03
Carbon, max 0.1 0.1 0.1 8.2 The surface of the casting shall be free of adhering mold
Oxygen, max 0.25 0.3 0.3
material, scale, cracks, and hot tears as determined by visual
Phosphorus, max 0.01 0.01 0.01
examination.Othersurfacediscontinuitiesshallmeetthevisual
Tin . 1.0 to 2.0 .
Niobium . . 2.0 to 3.0 acceptance standards specified in the order. Practice A802/
A
A802M or other visual standards may be used to define
By agreement between the purchaser and the producer, analysis may be
required and limits established for elements and compounds not specified in this
acceptable surface discontinuities and finish. Unacceptable
table.
surface discontinuities shall be removed, and their removal
verified by visual examination of the resultant cavities.
6.3 Product Analysis—A product analysis may be made by
9. Repair by Welding
the purchaser on a representative casting from any lot. Because
of the possibility of oxygen or other interstitial contamination,
9.1 If repairs are required, these shall be made using a
samples for oxygen, carbon, hydrogen, and nitrogen analysis
welding procedure and operators certified to quality require-
shall be taken no closer than ⁄4 in. (6.3 mm) to a cast surface
ments established by the producer. The procedures developed
except that castings too thin for this shall be analyzed on
shall be consistent with standard practices recommended for
representative material. The chemical composition determined
reactive metal alloys. The producer shall maintain documenta-
shall conform to the analysis in Table 1 within the check tion on procedure and welder qualifications. Procedure modi-
analysis variations shown in Table 2 or shall be subject to
fications or special arrangements shall be as agreed upon
rejection by the purchaser. between the producer and purchaser.
6.4 In the event of disagreement between the manufacturer
9.2 Weld repairs shall be considered major in the case of a
and the purchaser on the conformance of the material to the casting that has leaked on a hydrostatic test or when the depth
requirements of this specification or any special test specified
of the cavity after preparation for repair exceeds 20 % of the
by the purchase, a mutually acceptable referee shall perform actual wall thickness or 1 in. (25 mm), whichever is smaller, or
thetestsinquestion.Theresultsofthereferee’stestingshallbe
when the surface area of the cavity exceeds approximately 10
2 2
used in determining conformance of the material to this in. (6500 mm ). All other weld repairs shall be considered
specification.
minor. Major and minor repairs shall be subject to the same
quality standards as are used to inspect the castings.
7. Heat Treatment
9.3 The composition of the deposited weld metal shall be
within the chemical requirements for each grade established in
7.1 Unless otherwise specified in the contract, all castings
willbesuppliedintheas-castconditionexceptwhenpost-weld Table 1.
9.4 All castings with major weld repairs shall be stress
heat treatment is required.
7.2 Ifpost-weldheattreatmentisrequired,itshallconsistof relieved after repair in accordance with 7.2. Stress relief after
a stress relief performed at 1050 6 50°F (565 6 25°C) for a minor repairs is not required for grades 702C and 704C except
1 1
minimum of ⁄2 h at temperature plus an additional ⁄2hat by agreement between the producer and the purchaser. Grade
temperature per inch of thickness for section sizes greater than 705C must be stress relieved after any weld repair.
1 in. (25 mm). After heat treatment, the castings should be
10. Inspection
10.1 The producer shall afford the purchaser’s inspector all
TABLE 2 Check Analysis Tolerances
reasonable facilities necessary to satisfy him that the material
Permissible
Maximum
is being produced and furnished in accordance with this
Variation
Element of Range,
in Check
specification. Foundry inspection by the purchaser shall not
Weight, %
Analysis
interfere unnecessarily with the p
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