ASTM B985-2012 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、铸件和成品或半.pdf
《ASTM B985-2012 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、铸件和成品或半.pdf》由会员分享,可在线阅读,更多相关《ASTM B985-2012 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、铸件和成品或半.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B985 12Standard 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 the year oforigin
2、al 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 un-wrought alumin
3、um 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 bulk chemical composi
4、tion determined from samplestaken when ingots or castings are poured. These differences canbe due to elemental segregation that occurs duringsolidification, procedures that remove enriched material (e.g.ingot scalping), or procedures that remove depleted areas (e.g.removal of the riser from a castin
5、g).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 limits or other specified chemicalcom
6、position limits for the alloy. Analysis of such samples shallnot supersede the analysis of samples taken during pouring ofcastings or ingots in accordance with E716 and analyzed inaccordance with E607, E1251, E34, or EN 14242 and shall notbe used for determining compliance with chemical composi-tion
7、 requirements for an entire cast lot or part thereof.NOTE 1Pieces may include ingots, forgings, coils, sheets, extrusions,castings, etc. A single unwrought ingot or billet may produce multiplefinished or semi-finished pieces.NOTE 2Certification of entire cast lots should be determined usingsamples t
8、aken during pouring of castings or ingots in accordance withE716 and analyzed in accordance with E607, E1251, E34, or EN 14242.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. Thevalues stated in each system may not be exact equivalents;the
9、refore, 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 concerns, if any, associated with its use. It is theresponsibility of the user of this sta
10、ndard 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- and Magnesium-Alloy ProductsE34 Test Methods for Chemical Analysis of Aluminum andAlum
11、inum-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 Nitrogen Atmosphere (Withdrawn 2011)3E716 Practices for Sampling and Sample Preparation
12、ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spectrochemical AnalysisE1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Spark Atomic Emission Spectrometry2.2 Other Standards:4EN 14242 Aluminum and aluminum alloysChemical analy-sisInductively coupled plas
13、ma optical emission spectralanalysis3. Terminology3.1 For definitions of terms used in this Standard, refer toTerminologies E135 and B881.4. Summary of Practice4.1 The procedures described in this practice involve thecutting and drilling of aluminum products to obtain samples for1This practice is un
14、der the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.05 onTesting.Current edition approved Dec. 1, 2012. Published January 2013. DOI: 10.1520/B0985-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
15、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 European Committee for Standardization, C
16、entral 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 States1subsequent chemical analysis in accordance with ASTM Stan-dards E607, E1251, E34, or EN 142
17、42.5. Significance and Use5.1 Products covered by this practice are unwrought alumi-num ingots, billets, and castings and unclad wrought aluminumsheet, plate, rolled or cold finished extrusions, extrudedprofiles, wire, rod and bar. Machined wrought products (fin-ished or semi-finished) are excluded
18、(see Note 3). Thesepractices, used in conjunction with the appropriate samplepreparation techniques in E716 and the Test Methods E34,E607, E1251, and EN 14242, are suitable to determine if thepiece sampled meets the chemical composition limits regis-tered with the Aluminum Association Inc.5or other
19、specifiedchemical composition limits for the alloy. Analysis of suchsamples shall not supersede the analysis of samples takenduring pouring of castings or ingots in accordance with E716and analyzed in accordance with E607, E1251, E34,orEN14242 and shall not be used for determining compliance withche
20、mical composition requirements for an entire cast lot or partthereof.NOTE 3Sampling machined 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 obtaine
21、d from samples taken in accordance with thispractice and the original cast analysis of samples 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
22、 Association Inc or other specifiedchemical composition limits for the alloy.5.2 Users should 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 compositionde
23、termined using samples taken when ingots or castings arepoured. This difference can be due to 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 ingo
24、tscalping, the removal of risers from castings, or machining.NOTE 5When aluminum solidifies, macro-segregation may cause thechemical composition to vary throughout the ingot or casting. Certainareas may have enhanced or depleted concentrations of some elementsrelative to the average bulk chemical co
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