ASTM B329-2018 pdf free download

ASTM B329-2018 pdf free download.Standard Test Method for Apparent Density of Metal Powders and Compounds Using the Scott Volumeter
1. Scope
1.1 This test method covers determination of the apparent density of metal powders and related compounds using the Scott Volumeter, also known as the Paint Pigment Volumeter. 1.2 With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm 3 ) and gram (g) units is the long- standing industry practice, the values stated in SI units are to be regarded as the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory 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 the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Apparatus
5.1 Fig. 1 shows the Scott Volumeter consisting of the following parts: 5.1.1 Top Funnels—A large funnel with a No. 16 (1.18 mm) or a No. 18 (1 mm) screen per Specification E11, and a small conical funnel for directing the powder into the baffle box. Funnels and screen may be brass or stainless steel. 5.1.2 Baffle Box—A box with two glass sides and two wooden 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 more desirable than air cleaning. 5.1.3 Bottom Funnel—Asmall brass or stainless steel funnel directly beneath lower baffle box opening for directing the powder into the density cup. 5.1.4 Density Cups—A cylindrical cup having a capacity of 25.00 6 0.03 cm 3 , with an inside diameter of 29.50 6 2.50 mm; or a square cup with a capacity of 16.39 6 0.05 cm 3 and an inside dimension of 25.40 6 0.02 mm. Density cups shall be either brass or non-magnetic stainless steel. 5.1.5 Stand—A 90° pivoting wooden or stainless steel stand to support the funnels and the baffle box concentric with the density cup so that the bottom funnel lower opening is 19 mm above the top of the density cup as shown in Fig. 1 when using the square cup. Fig. 2 shows some suggested modifications for use of the cylindrical cup. Modifications A and C of Fig. 2 are suggested when the cylindrical cup is to be used exclusively. Modification B of Fig. 2 is suggested when both cups are to be used interchangeably. 5.2 Instrument Support—Astand or bench surface, level and vibration free. 5.3 Balance—A balance, readable to 0.01 g with a capacity of at least 200 g. 5.4 Brush—A good quality, 25.4-mm wide brush, preferably nylon. 5.5 Spatula—A standard 12.7-mm wide stainless steel labo- ratory spatula.
8. Procedure
8.1 Tare or preweigh the density cup. 8.2 Pour the powder being tested carefully into the top receiving funnel and permit the powder to run into the density cup. Completely fill the density cup to overflowing or fill to overflowing and form a mound of powder above the top of the density cup. If the powder is not free-flowing, carefully brush the sample through the top receiving funnel screen without jarring the volumeter. Jarring of the volumeter could result in packing of the powder in the density cups, thus giving erroneously high values. 8.3 Remove the excess powder in the density cup by passing the edge ofthe spatula blade parallel to, and in contact with, the top ofthe cup. Move the spatula smoothly along the top surface of the cup and back again until all excess powder has been removed, special care being taken to direct the excess powder into the unfilled areas ofthe cup. It is important that the spatula be kept level at all times to prevent packing or pulling out of the powder. Perform the completed leveling operation to produce a uniform powder surface perfectly level with the top of the density cup.