ASTM_B_329_-_18.pdf

Designation:B32918Standard Test Method forApparent Density of Metal Powders and Compounds Usingthe Scott Volumeter1This standard is issued under the fixed designation B329;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers determination of the apparentdensity of metal powders and related compounds using theScott Volumeter,also known as the Paint Pigment Volumeter.1.2 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 long-standing industry practice,the values stated in SI units are to beregarded as 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 standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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:2B215 Practices for Sampling Metal PowdersB243 Terminology of Powder MetallurgyB873 Test Method for Measuring Volume of Apparent Den-sity Cup Used in Test Methods B212,B329,and B417E11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,see Terminology B243.4.Significance and Use4.1 This test method covers the evaluation of the apparentdensity physical characteristic of powders.The degree ofcorrelation between the results of this test and the quality ofpowders in use will vary with each particular application andhas not been fully determined.4.2 The apparent density measured via this test method isoften referred to as the“Scott Density.”5.Apparatus5.1 Fig.1 shows the Scott Volumeter consisting of thefollowing parts:5.1.1 Top FunnelsA large funnel with a No.16(1.18 mm)or a No.18(1 mm)screen per Specification E11,and a smallconical funnel for directing the powder into the baffle box.Funnels and screen may be brass or stainless steel.5.1.2 Baffle BoxA box with two glass sides and twowooden sides containing a series of four glass baffle plates.The wooden baffle box may be substituted by a water-resistant material,such as stainless steel,if washing is moredesirable than air cleaning.5.1.3 Bottom FunnelAsmall brass or stainless steel funneldirectly beneath lower baffle box opening for directing thepowder into the density cup.5.1.4 Density CupsA cylindrical cup having a capacity of25.00 6 0.03cm3,withaninsidediameterof29.50 6 2.50 mm;or a square cup with a capacity of16.39 6 0.05 cm3and an inside dimension of 25.40 60.02 mm.Density cups shall be either brass or non-magneticstainless steel.5.1.5 StandA 90 pivoting wooden or stainless steel standto support the funnels and the baffle box concentric with thedensity cup so that the bottom funnel lower opening is 19 mmabove the top of the density cup as shown in Fig.1 when usingthe square cup.Fig.2 shows some suggested modifications foruse of the cylindrical cup.Modifications A and C of Fig.2 are1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.03 on Refractory Metal Powders.Current edition approved Oct.1,2018.Published November 2018.Originallyapproved in 1958.Last previous edition approved in 2014 as B329 14.DOI:10.1520/B0329-18.2For 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 suggested when the cylindrical cup is to be used exclusively.Modification B of Fig.2 is suggested when both cups are to beused interchangeably.5.2 Instrument SupportAstand or bench surface,level andvibration free.5.3 BalanceA