ASTM_B_703_-_10.pdf

Designation:B70310Standard Test Method forApparent Density of Metal Powders and RelatedCompounds Using the Arnold Meter1This standard is issued under the fixed designation B703;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 quantitative laboratory proce-dure for determining the apparent density of both free-flowingand non-free-flowing metal powders,lubricated metal powdermixtures,and powder compounds.1.2 With the exception of the values for mass,volume,anddensity,for which the use of the gram and the cubic centimetreunits is the long-standing industry practice,the values stated ininch-pound units are to be regarded as standard.The valuesgiven in parentheses are mathematical conversions to SI unitsthat are provided for information only and are not consideredstandard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B212 Test Method for Apparent Density of Free-FlowingMetal Powders Using the Hall Flowmeter FunnelB215 Practices for Sampling Metal PowdersB243 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 FunnelE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 MPIF Standard:3MPIF 48 Determination of Apparent Density of Metal Pow-ders Using the Arnold Meter3.Terminology3.1 DefinitionsUseful definitions of terms for metal pow-ders and powder metallurgy are found in Terminology B243.Additional descriptive PM information is available in theRelated Materials section of Volume 02.05 of the Annual Bookof ASTM Standards.3.2 Definitions of Terms Specific to This Standard:3.2.1 Arnold Apparent Density(ADA)the mass per unitvolume of a powder,expressed in gram per cubic centimetreunits,determined in accordance with the procedure in this testmethod.3.2.2 Arnold Meterthe laboratory instrumentation pic-tured in Fig.1,consisting of a steel die block with a precisecavity and a powder delivery cylinder,that is used to determinea quantitative value for Arnold Apparent Density,(ADA).4.Summary of Test Method4.1 The test method consists of first collecting a 20 cm3volume of the test powder by slowly sliding a cylindricalsleeve containing the test powder over a precise cavity in a dieblock.4.2 The mass of the volume of powder thus collected isdetermined and the Arnold Apparent Density(ADA),is calcu-lated as mass divided by volume and expressed in g/cm3units.5.Significance and Use5.1 The apparent density is an important measure of amaterial characteristic of the powder that is useful to thepowder producers and powder users in determining quality andlot to lot consistency.5.2 This test method is applicable to free-flowing andnon-free-flowing metal powders,lubricated powder mixturesand metal compounds.1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Productsand is the direct responsibility of Subcommit-tee B09.02 on Base Metal Powders.Current edition approved Sept.1,2010.Published September 2010.Originallyapproved in 1983.Last previous edition approved in 2005 as B703 05.DOI:10.1520/B0703-10.2For 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.3This report is available from Metal Powder Industries Federation,105 CollegeRoad East,Princeton,NJ 08540*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 5.3 The apparent density of a lubricated metal powdermixture may be different when a quantity settles after fallinginto the die cavity during automatic compacting as comparedwith the value obtained from a measurement taken in thelaboratory under controlled test conditions.5.4 This test method simulates the action of the feed shoe ona powder compacting press and gives an apparent density valuethat closely approximates the apparent density of the powder inthe die cavity after the production filling operation.5.5 Knowledge of this apparent density value for the finallubricated production powder mixture is very helpful