ASTM B985-2012(2016) Standard Practice for Sampling Aluminum Ingots Billets Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis《成分分析用铝锭 坯料 铸.pdf
《ASTM B985-2012(2016) Standard Practice for Sampling Aluminum Ingots Billets Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis《成分分析用铝锭 坯料 铸.pdf》由会员分享,可在线阅读,更多相关《ASTM B985-2012(2016) Standard Practice for Sampling Aluminum Ingots Billets Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis《成分分析用铝锭 坯料 铸.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B985 12 (Reapproved 2016)Standard Practice forSampling Aluminum Ingots, Billets, Castings and Finishedor Semi-Finished Wrought Aluminum Products forCompositional Analysis1This standard is issued under the fixed designation B985; the number immediately following the designation indicates
2、 the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice describes procedures for sampling
3、 un-wrought aluminum ingots, billets, castings and finished orsemi-finished wrought aluminum products to obtain a repre-sentative sample for determining chemical composition.1.1.1 Chemical compositions determined from samples ob-tained in accordance with this standard practice may differfrom the bul
4、k chemical composition determined from samplestaken when ingots or castings are poured. These differences canbe due to elemental segregation that occurs duringsolidification, procedures that remove enriched material (forexample, ingot scalping), or procedures that remove depletedareas (for example,
5、removal of the riser from a casting).1.1.2 Analysis of samples obtained from unwrought alumi-num ingots, billets, and castings and finished or semi-finishedwrought aluminum products can be used to determine if thepiece sampled meets The Aluminum Association, Inc. regis-tered chemical composition lim
6、its or other specified chemicalcomposition limits for the alloy. Analysis of such samples shallnot supersede the analysis of samples taken during pouring ofcastings or ingots in accordance with Practices E716 andanalyzed in accordance with Test Methods E34, E607, E1251,or EN 14242 and shall not be u
7、sed for determining compliancewith chemical composition requirements for an entire cast lotor part thereof.NOTE 1Pieces may include ingots, forgings, coils, sheets, extrusions,castings, and so forth. A single unwrought ingot or billet may producemultiple finished or semi-finished pieces.NOTE 2Certif
8、ication of entire cast lots should be determined usingsamples taken during pouring of castings or ingots in accordance withPractices E716 and analyzed in accordance with Test Methods E34, E607,E1251, or EN 14242.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded sep
9、arately as standard. Thevalues stated in each system may not be exact equivalents;therefore, each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of thesafety conce
10、rns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B881 Terminology Relating to Aluminum- a
11、nd Magnesium-Alloy ProductsE34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base AlloysE135 Terminology Relating to Analytical Chemistry forMetals, Ores, and Related MaterialsE607 Test Method for Atomic Emission SpectrometricAnalysis Aluminum Alloys by the Point to Plane Tech-nique Nit
12、rogen Atmosphere (Withdrawn 2011)3E716 Practices for Sampling and Sample Preparation ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spark Atomic Emission Spec-trometryE1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Spark Atomic Emission Spectrometry2.2
13、Other Standards:4EN 14242 Aluminum and Aluminum AlloyschemicalAnalysisinductively Coupled Plasma Optical EmissionSpectral Analysis3. Terminology3.1 For definitions of terms used in this Standard, refer toTerminologies B881 and E135.1This practice is under the jurisdiction of ASTM Committee B07 on Li
14、ghtMetals and Alloys and is the direct responsibility of Subcommittee B07.05 onTesting.Current edition approved Nov. 1, 2016. Published November 2016. Originallyapproved in 2012. Last previous edition approved in 2012 as B985 12. DOI:10.1520/B0985-12R16.2For referenced ASTM standards, visit the ASTM
15、 website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Europea
16、n Committee for Standardization, Central Secretariat(CEN), rue de Stassart 36, B1050 Brussels, Belgium. http:/www.cen.eu/esearch.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Summary of Practice4.1 The procedures described in thi
17、s practice involve thecutting and drilling of aluminum products to obtain samples forsubsequent chemical analysis in accordance with Test MethodsE34, E607, E1251, or EN 14242.5. Significance and Use5.1 Products covered by this practice are unwrought alumi-num ingots, billets, and castings and unclad
18、 wrought aluminumsheet, plate, rolled or cold finished extrusions, extrudedprofiles, wire, rod and bar. Machined wrought products (fin-ished or semi-finished) are excluded (see Note 3). Thesepractices, used in conjunction with the appropriate samplepreparation techniques in Practices E716 and the Te
19、st MethodsE34, E607, E1251, and EN 14242, are suitable to determine ifthe piece sampled meets the chemical composition limitsregistered with the Aluminum Association Inc.5or otherspecified chemical composition limits for the alloy. Analysis ofsuch samples shall not supersede the analysis of samples
20、takenduring pouring of castings or ingots in accordance withPractices E716 and analyzed in accordance with Test MethodsE34, E607, E1251, or EN 14242 and shall not be used fordetermining compliance with chemical composition require-ments for an entire cast lot or part thereof.NOTE 3Sampling machined
21、pieces of products pose a particularproblem because the piece itself may not be a representative sample of theoriginal cast chemical composition. Larger differences may be expectedbetween an analysis obtained from samples taken in accordance with thispractice and the original cast analysis of sample
22、s taken during pouring ofcastings or ingot.NOTE 4Portable Spark-AES and hand held XRF instruments shouldnot be used to determine if the piece sampled meets chemical compositionlimits registered with Aluminum Association Inc or other specifiedchemical composition limits for the alloy.5.2 Users should
23、 be aware that chemical compositionsdetermined using samples taken from unwrought aluminumingots, billets, and castings and finished or semi-finishedproducts might differ from the bulk chemical compositiondetermined using samples taken when ingots or castings arepoured. This difference can be due to
24、 elemental segregationupon solidification, sampling a non-homogenous section of theingot or billet, removal of enriched material, or depleted areasof solidified material by subsequent procedures such as ingotscalping, the removal of risers from castings, or machining.NOTE 5When aluminum solidifies,
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