ASTM_B_873_-_17.pdf

Designation:B87317Standard Test Method forMeasuring Volume of Apparent Density Cup Used in TestMethods B212,B329,and B4171This standard is issued under the fixed designation B873;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 year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers a procedure for measuring thevolume of the apparent density cups used in Test MethodsB212,B329,and B417.1.2 The apparent density cup,particularly its rim,maybecome worn during use,and it is recommended that thevolume of the cup be checked periodically(at least every 6months)in order to ensure that it complies with the specifiedvolume.1.3 With the exception of the values for density and themass used to determine density,for which the use of the gramper cubic centimetre(g/cm3)and gram(g)units is the longstanding industry practice,the values in SI units are to beregarded as standard.1.4 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 standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory 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 theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2B212 Test Method for Apparent Density of Free-FlowingMetal Powders Using the Hall Flowmeter FunnelB243 Terminology of Powder MetallurgyB329 Test Method for Apparent Density of Metal Powdersand Compounds Using the Scott VolumeterB417 Test Method for Apparent Density of Non-Free-Flowing Metal Powders Using the Carney FunnelE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.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.4.Summary of Test Method4.1 The apparent density cup is filled with water andweighed to obtain the mass of water contained,which is thenconverted to a volume.5.Significance and Use5.1 This test method enables the measurement of the vol-ume of the apparent density cup to ensure that it complies withthe specified volume of 25.00 6 0.03 cm3(cylindrical cup),or16.39 6 0.05 cm3(square cup).Use of an out-of-specificationcup will give erroneous apparent density values using theformulae in Test Methods B212,B329,and B417.6.Apparatus6.1 Density CupA cylindrical cup(see Fig.1)designed tohave a capacity of 25.00 6 0.03 cm3(as in Test Methods B212,B329,and B417)or a square cup designed to have a capacityof 16.39 6 0.05 cm3(as in Test Method B329).6.2 Balance,readable to 0.0001 g with a minimum capacityof 200 g to be used for determining mass to the nearest0.001 g.6.3 Microscope SlideA transparent microscope slide atleast as wide as the outer diameter of the apparent density cup.6.4 WaterDistilled or deionized water boiled to removedissolved air.6.5 AlcoholLow residue ethyl alcohol.6.6 WireA wire not exceeding 2.5 mm in diameter by 150mm long.1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.02 on Base Metal Powders.Current edition approved April 1,2017.Published November 2012.Originallyapproved in 1996.Last previous edition approved in 2012 as B873 12.DOI:10.1520/B0873-17.2For 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 Document 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.7 ThermometerAthermometer capable of measuring thetemperature of the water to the nearest 1C.7.Procedure7.1 Boil at least 150 mL of distilled or deionized water for5 min to remove dissolved air.Cool to room temperature andhandle so as to avoid the introduction of air bubbles.7.2 Clean the density cup with alcohol and dry thoroughly.7.3 Weigh the density cup along with a clean,clear micro-sco