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ASTM B350-11(R2021) pdf free download

ASTM B350-11(R2021) pdf free download.Standard Specification for Zirconium and Zirconium Alloy Ingots for Nuclear Application
1.1 This specification covers vacuum-melted zirconium and zirconium alloy ingots for nuclear application.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently ofthe other. Combining values from the two systems may result in nonconformance with the specifi- cation.
1.3 The following precautionary caveat pertains only to the test method portions of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility ofthe user ofthis standard to establish appropriate safety, health, and environ- mental practices and determine the applicability ofregulatory limitations prior to use.
1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
7.1 Unless otherwise specified, ingots shall be conditioned by machining or grinding or both to remove surface and subsurface defects detrimental to subsequent fabrication.
7.2 After conditioning has been completed, no abrupt changes in diameter or local depression that will impair subsequent fabrication shall be permitted. The difference between the maximum and minimum radii of the conditioned ingot shall not exceed 20 % of the maximum radius. Lands, grooves, and local depressions shall be blended to a maximum angle of30° to the axis ofthe ingot. Each end ofthe ingot shall be chamfered or radiused. The minimum chamfer or radius shall be 1 ⁄ 2 in. [12 mm].
8. Chemical Requirements
8.1 The ingot shall conform to the requirements for chemi- cal composition as prescribed in Table 1. Guide E2626 may be used as a guide for chemical analysis techniques. N OTE 2—Nuclear grade zirconium ingots produced from electrolytic starting material should be produced using methods such that the final ingot fluorine content is <1ppm to mitigate risk of poor breakaway performance. In order to achieve this target fluorine level, a quad melt process under vacuum is strongly recommended.
8.2 The ingot shall be sampled in sufficient places along the side wall so that the top sample is within 5 in. [125 mm] of the top face and the distance between samples or between the bottom face and a sample does not exceed one ingot diameter. A minimum of three samples per ingot is required.
8.3 These samples shall be analyzed for the alloying and impurity elements given in Table 1.
8.4 Analysis shall be made using the manufacturer’s stan- dard methods. In the event of disagreement as to the chemical composition of the metal, methods of chemical analysis for reference purposes shall be determined by a mutually accept- able laboratory.
8.5 Product Check Analysis—Product check analysis is an analysis made by or for the purchaser for the purpose of verifying the composition of the ingot. The check analysis tolerances reflect the variation between laboratories in the measurement of chemical composition. The permissible varia- tion in the product check analysis from the specified range is as prescribed in Table 2.
9. Retest
9.1 If any sample or specimen exhibits obvious contamination, improper preparation, or flaws disqualifying it as a representative sample, it shall be discarded and a new sample or specimen substituted.
9.2 If the results of any test are not in conformance with the requirements of this specification, the ingot may be retested at the option of the manufacturer. The manufacturer may scalp or crop the ingot to remove nonconforming material then resa- mple remaining ingot position(s). The ingot shall be acceptable if all results of retests following the initial test(s) conform to this specification.

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