3923/2 nternational Standard (ISO) INTERNATIONALORGANIZATIONFOR STANDARDIZATION+MEXAYHAPOAHAR OPTAHW3AUWR HO CTAHAAPTM3AUMM?ORGANISATION INTERNATIONALEDENORMALISATION Metallic powders - Determination of apparent density Part 2 : Scott volumeter method Poudres métalliques -- Determination de la masse volumique apparente - Partie 2 : Methode du volumetre de Scott First edition - 1981-09-01 ISO 3923/2-1981 (E) UDC 621.762 : 669-492.2 : 531.755 Ref.No. ISO 3923/2-1981 (E) Descriptors : pulverulent products, metallic powder, tests, determination, density (mass/volume), funnels, sampling, volumetric analysis. Price based on 4 pages Foreword ISO (the Internationai Organization for Standardization) is a woridwide federation of national standards institutes (isO member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees. Every member body interested in a subject for which a technical committee has been set up has the and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International StandardISO 3923/2was sdeveloped by Technical Committee ISO/TC119, Powder metallurgy, and was circulated to the member bodies in December1979. Austria Germany, F. R. Romania Bulgaria India South Africa, Rep. of Canada Italy Spain China Japan Sweden Czechoslovakia Korea, Rep. of United Kingdom Egypt, Arab Rep. of Norway USA France Portugai USSR No member body expressed disapproval of the document )International Organization for Standardization,1981 Printed in Switzerland ISO 3923/2-1981 (E) INTERNATIONAL STANDARD Metallic powders -- Determination of apparent density Part 2 : Scott volumeter method 1 Scope and field of application 5 Apparatus This part of ISO 3923 specifies the Scott volumeter method for 5.1 Scottvolumeter,comprising: the determination of the apparent density of metallic powders. It is applicable to powders that will not flow freely through a 5.1.1 Funnel, having a large and a small conical section 5mmorifice(seeISO3923/1). separated by a cylindrical section and incorporating a brass Part 3 of this International Standard specifies the oscillating sieve of aperture size 1,18 mm. funnel method for the determination of apparent density of such powders, and this is preferred since it gives better preci- 5.1.2 Baffle box, having a square section, and containing sion, but it cannot be used in cases where the powder may four glass baffles which may be located and retained by change its properties due to the vibration action applied to the grooves in opposite sides of the box and may thus be removed powder during testing. for ease of cleaning. The baffles are arranged so that the powder falls on to each of them in turn, thereby breaking the fall and reducing the velocity of the stream of powder. It is im- 2 References portant that none of the powder can pass between the upper edge of the glass baffles and the sides of the baffle box. It is Iso 3923/1, Metallic powders Determinationof apparent also important that the lower edges of the glass baffles are density Part 1 : Funnel method. either in line or slightly overlap in a vertical plane. IsO3923/3,Metallic powders Determination of apparent A typical design of Scott volumeter is shown in figures 1 and 2. density- Part 3 : Oscillating funnel method. Dimensions given with tolerances are mandatory. The other dimensions representthosemostfrequently usedand mayvary slightly, provided that the principle requirements previously 3 Principle mentioned are maintained. Measurement of the mass of a certain quantity of powder 5.1.3 Stand and horizontal vibration-free base, to support which in a loose condition exactly fills a cup of known volume. the cup, box and funnel coaxially at the heights indicated in the The loose condition is obtained, when filing the