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ASTM B880-2019 pdf free download

ASTM B880-2019 pdf free download.Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
1. Scope
1.1 This specification covers limits of variation for deter- mining acceptability of the chemical composition of cast or wrought nickel, nickel alloy, and cobalt alloy parts and/or material supplied by a producer. Check analysis limits for elements or for ranges of elements not currently listed herein shall be as specified in the applicable material specification or as agreed upon by purchaser and supplier. 1.2 In case of any conflicting requirements, the require- ments of the purchase order, the individual material specification, and this general specification shall prevail in the sequence named. 1.3 When specifically referenced in the material specification, the buyer may elect to apply check analysis limits to determine acceptability at his final acceptance or verification procedures. Check analysis limits are not permitted or are to be used by the producer for their own ladle or ingot analysis acceptance testing. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 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.
3. Terminology
3.1 Definitions: 3.1.1 check (product or verification) analysis, n—analysis made by buyer of parts and materials to verify conformity to specification, or to determine variations in compositions within a heat or lot. Discussion—Heat or lot acceptance or rejection of parts and materials may be made by applying check limits as described in 3.1.2. Check limits offinished parts or material do not apply to elements whose percentage can be varied by fabricating techniques employed unless the sample is taken in such a manner as to exclude such variations. 3.1.2 variation limit, under minimum or over maximum, n—it is the amount of variation for a specified element, which may vary either under or over the specified composition limit during an individual check analysis. Discussion—In no case shall the reported determi- nations of any element in a heat, using the same analytical procedure, vary both above and below the specified range. 3.1.3 remainder or balance, n—refers to main element, which forms the basis of that particular alloy and from which the alloy is made. Discussion—It is assumed to be present in an amount approximately equal to the difference between 100 % and the sum percentage of the alloying elements and listed impurities or residual elements. It need not be analyzed or need an actual percentage figure for reporting purposes.3.1.4 residual elements, n—specified or unspecified elements, not intentionally added, which may be present, due to their presence in starting raw materials or manufacturing processes. Discussion—Producers will not normally analyze for such elements, unless specifically asked for in the specifi- cation or purchase order. Discussion—Reporting analyses of unspecified ele- ments is permitted. 3.1.5 remainder or balance, n—the element comprising the major portion of an alloy’s composition, determined by sub- tracting the sum of the amounts of all analyzed elements (specified elements, and when measured, unspecified elements) from 100 %. Discussion—It is not the intention of 3.1.5 that an analysis is required for any unspecified element. Discussion—A chemical analysis for the remainder or balance element is not required. The manufacturer is permitted to report the analysis of the element as “balance” or “remainder” and need not report the result of the actual arithmetic calculation, unless requested by the purchaser in the purchase order.

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