1、Designation:B21515Standard Practices forSampling Metal Powders1This standard is issued under the fixed designation B215;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the y
2、ear of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 These practices cover sampling methods used to collecta small quantity of metal powder tha
3、t is as representative of theentire starting material as possible,and details the proceduresthat are recommended for reducing this quantity into smallertest portions on which chemical,physical,and mechanicalproperty data may be determined.1.2 Several sampling practices are described,depending onthei
4、r applicability to the conditions of storage and transport ofthe sampled powders:1.2.1 Practice 1A(Described in Section 6)Applicable tosampling moving powders,as when being transferred from onecontainer to another or to a process stream;or when fallingfrom a conveyor;or in a moving process stream.Th
5、is is thepreferred practice for obtaining the several increments that arecombined to form the gross sample.1.2.2 Practice 1B(Described in Section 7)Applicable tosampling powders that have already been packaged fortransport,as in a bag or drum.A hollow tubular slot sampler isthe recommended way to sa
6、mple these packaged powders toobtain the increments(7.1.1).Alternatively,when other meth-ods are not possible or available,a procedure specified here(7.1.2)may be used to randomly scoop samples from thepowder,using a scoop of specified material and configuration.1.2.3 Practice 2(Described in Section
7、 8)Applicable toobtaining test portions from the composite sample.For largerquantities of powder,a chute splitter is generally used,while aspinning riffler is used for smaller quantities.1.3 These practices apply to particulate materials or mix-tures of particulates with particle sizes generally les
8、s than onemillimetre and include mixtures containing lubricant,with orwithout other non-metallic additives,that are ready for com-pacting.1.4 These practices do not cover the sampling of flakepowders or pastes.For procedures on the sampling and testingof flake metal powders and pastes,refer to Test
9、Methods D480.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 This standard does not purport to address all of thesafety concerns,i
10、f 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:2B243 Terminology of Powder MetallurgyD480 Test Me
11、thods for Sampling and Testing of FlakedAluminum Powders and Pastes3.Terminology3.1 DefinitionsDefinitions of powder metallurgy termscan be found in Terminology B243.Additional descriptiveinformation is available in the Related Materials section of Vol02.05 of the Annual Book of ASTM Standards.3.2 D
12、efinitions of Terms Specific to This Standard:3.2.1 See Fig.1 for the terms hereinafter defined.3.2.2 composite sampleblended entire gross sample.3.2.3 incrementquantity of powder obtained by a sam-pling device at one time from a larger quantity of powder.3.2.4 gross sampletotal quantity of powder a
13、dequate forthe intended purpose(s),consisting of all the incrementscombined.3.2.5 test portionquantity of powder(generally takenfrom the composite sample)on which the test is performed,orfrom which a test piece is produced.4.Significance and Use4.1 Specifications and test methods for metal powders a
14、ndmetal powder products require the sampling,testing,and1These practices are under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and are the direct responsibility of Subcom-mittee B09.02 on Base Metal Powders.Current edition approved Oct.1,2015.Published October 20
15、15.Originallyapproved in 1946.Last previous edition approved in 2010 as B215 10.DOI:10.1520/B0215-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Docume
16、nt Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 performance evaluation of small samples taken from largequantities of powder.The sampling procedure is equally asimportant as the testing and evaluation;the sampling methodsused must include every precaution to ensure that the samplesobtained will show the true nature and condition of the
