1、Designation: B873 01 (Reapproved 2007) B873 12Standard 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 B873; the number immediately following the designation indicates the year oforiginal adoption
2、 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 Scope*1.1 This test method covers a procedure for measuring the volume of the a
3、pparent density cups used in Test Methods B212,B329, and B417.1.2 The apparent density cup, particularly its rim, may become worn during use, and it is recommended that the volume of thecup be checked periodically (at least every 6 months) in order to ensure that it complies with the specified volum
4、e.1.3 With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubiccentimetre (g/cm3) and gram (g) units is the long standing industry practice, the values in SI units are to be regarded as standard.1.4 This standard does not purport to
5、address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B212 Test Me
6、thod for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter FunnelB243 Terminology of Powder MetallurgyB329 Test Method for Apparent Density of Metal Powders and Compounds Using the Scott VolumeterB417 Test Method for Apparent Density of Non-Free-Flowing Metal Powders Using the
7、Carney Funnel3. Terminology3.1 DefinitionsDefinitions of powder metallurgy terms can be found in Terminology B243. Additional descriptive informationis available in the Related Materials section of Vol 02.05 of the Annual Book of ASTM Standards.4. Summary of Test Method4.1 The apparent density cup i
8、s filled with water and weighed to obtain the mass of water contained, which is then convertedto a volume.5. Significance and Use5.1 This test method enables the measurement of the volume of the apparent density cup to ensure that it complies with thespecified volume of 25.00 6 0.03 cm3 (cylindrical
9、 cup), or 16.39 6 0.05 cm3 (square cup). Use of an out-of-specification cup willgive erroneous apparent density values using the formulae in Test Methods B212, B329, and B417.6. Apparatus6.1 Density CupA cylindrical cup (see Fig. 1) designed to have a capacity of 25.00 6 0.03 cm3 (as in Test Methods
10、 B212,B329, and B417) or a square cup designed to have a capacity of 16.39 6 0.05 cm3 (as in Test Method B329).1 This test method is under the jurisdiction of ASTM Committee B09 on Metal Powders and Metal Powder Productsand is the direct responsibility of Subcommittee B09.02on Base Metal Powders.Cur
11、rent edition approved March 15, 2007Nov. 1, 2012. Published April 2007November 2012. Originally approved in 1996. Last previous edition approved in 20012007as B873 01.B873 01(2007). DOI: 10.1520/B0873-01R07.10.1520/B0873-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or co
12、ntact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have
13、been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official docum
14、ent.*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 States16.2 Balance, suitable for weighing at least readable to 0.0001 g with a minimum capacity of 200 g to be used for dete
15、rminingmass to the nearest0.001 g.6.3 Microscope SlideA transparent microscope slide at least as wide as the outer diameter of the apparent density cup.6.4 WaterDistilled or deionized water boiled to remove dissolved air.6.5 AlcoholLow residue ethyl alcohol.6.6 WireA wire not exceeding 2.5 mm in dia
16、meter by 150 mm long.6.7 ThermometerA thermometer capable of measuring the temperature of the water to the nearest 1C.7. Procedure7.1 Boil at least 150 mL of distilled or deionized water for 5 min to remove dissolved air. Cool to room temperature and handleso as to avoid the introduction of air bubb
17、les.7.2 Clean the density cup with alcohol and dry thoroughly.7.3 Weigh, to the nearest 0.001 g, the density cup along with a clean, clear microscope slide. This is the tare mass, T.7.4 Fill the density cup with the prepared water until the water overflows.7.5 Dislodge any air bubbles inside the den
18、sity cup with a clean wire.7.6 Slide the clean, clear microscope slide horizontally across the rim of the density cup, spilling the excess water over the sidesof the cup and center the microscope slide on top of the cup.7.7 If any air bubbles appear, remove the microscope slide and return to 7.4.7.8
19、 Dry the outside of the density cup and the exposed surfaces of the microscope slide with paper toweling. Ensure that theabsorbency of the toweling does not wick water from inside the cup.7.9 Weigh, to the nearest 0.001 g, the dried density cup filled with water with the microscope slide on top. Thi
20、s is the gross mass,G.7.10 Measure the temperature of the water to the nearest 1C and determine the density of the water, w, from Table 1.8. Calculation8.1 Calculate the mass of water contained in the density cup from the following formula:M 5G 2T (1)FIG. 1 Cylindrical Apparent Density CupB873 122wh
21、ere:M = mass of water in the density cup,G = gross mass of density cup, plus water, plus microscope slide, andT = tare mass of density cup plus microscope slide.8.2 Calculate the volume of the density cup, V, from the following relationship:V 5 Mw(2)where:V = volume of the density cup,M = mass of wa
22、ter in the density cup, andw = density of the water from Table 1.9. Report9.1 Report the volume of the density cup to the nearest0.01 cm3.9.1.1 Cylindrical Cup:9.1.1.1 If the measured volume of the cylindrical density cup falls within the specified range 25.00 6 0.03 cm3 , it is permissibleto use 25
23、 cm3 in the formula for calculating apparent density in Test Methods B212, B329, and B417.9.1.1.2 If the measured volume of the cylindrical density cup falls outside the specified range of 25.00 6 0.03 cm3 but fallswithin the broader range of 24.8 to 25.2 cm3, then the measured volume should be used
24、 in the formula for calculating apparentdensity in Test Methods B212, B329, and B417.9.1.2 Square Cup:9.1.2.1 If the measured volume of the square density cup falls within the specified range 16.39 6 0.05 cm3, it is permissibleto use 16.39 cm3 in the formula for calculating apparent density in Test
25、Method B329.9.1.2.2 If the measured volume of the square density cup falls outside the specified range of 16.39 6 0.05 cm3 but falls withinthe broader range of 16.2 to 16.6 cm3, then the measured volume should be used in the formula for calculating apparent densityin Test Method B329.10. Precision a
26、nd Bias10.1 The precision and bias of this test method is currently under development in Subcommittee B09.02 on Base MetalPowders.11. Keywords11.1 apparent density cup; cup volume; density cup; measuring cup volume; volume of cupTABLE 1 Density of Air-Free WaterATemperature (C) w, Density (g/cm3)15
27、0.999116 0.998917 0.998818 0.998619 0.998420 0.998221 0.998022 0.997823 0.997524 0.997325 0.997026 0.996827 0.996528 0.996229 0.995930 0.9956A Metrological Handbook 145,“ Quality Assurance for Measurements,” NationalInstitute of Standards and Technology, 1990, p. 9, 10.B873 123SUMMARY OF CHANGESComm
28、ittee B09 has identified the location of selected changes to this standard since the last issue(B873 01(2007) that may impact the use of this standard.(1) Added a statement of units in Section 1.(2) Modified the description of the balance in Section 6.2.(3) Deleted Sections 9.1.1 and 9.1.2 from the
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30、uch rights, are entirely their own responsibility.This standard is subject to revision at any time 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 add
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32、he ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B873 124
