1、Designation: B 873 01 (Reapproved 2007)Standard Test Method forMeasuring Volume of Apparent Density Cup Used in TestMethods B 212, B 329, and B 4171This standard is issued under the fixed designation B 873; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure for measuring thevolume of the apparent densi
3、ty cups used in Test MethodsB 212, B 329, and B 417.1.2 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 This st
4、andard 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
5、 ASTM Standards:2B 212 Test Method for Apparent Density of Free-FlowingMetal Powders Using the Hall Flowmeter FunnelB 243 Terminology of Powder MetallurgyB 329 Test Method for Apparent Density of Metal Powdersand Compounds Using the Scott VolumeterB 417 Test Method for Apparent Density of Non-Free-F
6、lowing Metal Powders Using the Carney Funnel3. Terminology3.1 DefinitionsDefinitions of powder metallurgy termscan be found in Terminology B 243. Additional descriptiveinformation is available in the Related Materials section of Vol02.05 of the Annual Book of ASTM Standards.4. Summary of Test Method
7、4.1 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
8、 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 B 212, B 329, and B 417.6. Apparatus6.1 Density CupA cylindrical cup (see Fig. 1) designed tohave a capacity of 25.00 6
9、0.03 cm3(as in Test MethodsB 212, B 329, and B 417) or a square cup designed to have acapacity of 16.39 6 0.05 cm3(as in Test Method B 329).6.2 Balance, suitable for weighing at least 200 g to thenearest 0.001 g.6.3 Microscope SlideA transparent microscope slide atleast as wide as the outer diameter
10、 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.6.7 ThermometerA thermometer capable of measuringthe temperature of the water to the nearest 1C.7. Proce
11、dure7.1 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, to the nearest 0.001 g, the density cup along witha cl
12、ean, clear microscope slide. This is the tare mass, T.7.4 Fill the density cup with the prepared water until thewater overflows.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
13、 Metal Powders.Current edition approved March 15, 2007. Published April 2007. Originallyapproved in 1996. Last previous edition approved in 2001 as B 873 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AS
14、TMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.5 Dislodge any air bubbles inside the density cup with aclean wire.7.6 Slide the clean,
15、 clear microscope slide horizontallyacross the rim of the density cup, spilling the excess water overthe sides of the cup and center the microscope slide on top ofthe cup.7.7 If any air bubbles appear, remove the microscope slideand return to 7.4.7.8 Dry the outside of the density cup and the expose
16、dsurfaces of the microscope slide with paper toweling. Ensurethat the absorbency of the toweling does not wick water frominside the cup.7.9 Weigh, to the nearest 0.001 g, the dried density cupfilled with water with the microscope slide on top. This is thegross mass, G.7.10 Measure the temperature of
17、 the water to the nearest1C and determine the density of the water, rw, from Table 1.8. Calculation8.1 Calculate the mass of water contained in the density cupfrom the following formula:M 5 G 2 T (1)where:M = mass of water in the density cup,G = gross mass of density cup, plus water, plus micro-scop
18、e slide, andT = tare mass of density cup plus microscope slide.8.2 Calculate the volume of the density cup, V, from thefollowing relationship:V 5Mrw(2)where:V = volume of the density cup,M = mass of water in the density cup, andrw= density of the water from Table 1.9. Report9.1 Report the volume of
19、the density cup to the nearest 0.01cm3.9.1.1 Cylindrical Cup:9.1.1.1 If the measured volume of the cylindrical densitycup falls within the specified range 25.00 6 0.03 cm3,itispermissible to use 25 cm3in the formula for calculatingapparent density in Test Methods B 212, B 329, and B 417.9.1.1.2 If t
20、he measured volume of the cylindrical densitycup falls outside the specified range of 25.00 6 0.03 cm3butfalls within the broader range of 24.8 to 25.2 cm3, then themeasured volume should be used in the formula for calculatingapparent density in Test Methods B 212, B 329, and B 417.9.1.2 Square Cup:
21、9.1.2.1 If the measured volume of the square density cupfalls within the specified range 16.39 6 0.05 cm3,itispermissible to use 16.39 cm3in the formula for calculatingapparent density in Test Method B 329.9.1.2.2 If the measured volume of the square density cupfalls outside the specified range of 1
22、6.39 6 0.05 cm3but fallswithin the broader range of 16.2 to 16.6 cm3, then themeasured volume should be used in the formula for calculatingapparent density in Test Method B 329.10. Precision and Bias10.1 The precision and bias of this test method is currentlyunder development in Subcommittee B09.02
23、on Base MetalPowders.11. Keywords11.1 apparent density cup; cup volume; density cup; mea-suring cup volume; volume of cupFIG. 1 Cylindrical Apparent Density CupTABLE 1 Density of Air-Free WaterATemperature (C) rw, Density (g/cm3)15 0.999116 0.998917 0.998818 0.998619 0.998420 0.998221 0.998022 0.997
24、823 0.997524 0.997325 0.997026 0.996827 0.996528 0.996229 0.995930 0.9956AMetrological Handbook 145,“ Quality Assurance for Measurements,” NationalInstitute of Standards and Technology, 1990, p. 9, 10.B 873 01 (2007)2ASTM International takes no position respecting the validity of any patent rights a
25、sserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time
26、 by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will re
27、ceive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM In
28、ternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B 873 01 (2007)3
