ISO 2738 pdf download

ISO 2738 pdf download.Sintered metal materials, excluding hardmetals — Permeable sintered metal materials — Determination of density, oil content and open porosity 1 Scope This international Standard specifies methods of determining the density, oil content and open porosity of permeable sintered metal materials. It applies in particular to porous metal bearings and to structural parts produced by pressing and sintering metal powders. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 758, Liquid chemical products for industrial use — Determination of density at 20 °C. ISO 1 3944, Lubricated metal-powder mixes — Determination of lubricant content — Modified Soxhlet extraction method. 4 Terms and definitions For the purposes of this International Standard the following terms and definitions apply. 4.1 density the density of the test piece may be expressed in two ways: 4.1.1 dry density the mass, after drying, divided by the volume 4.1.2 fully impregnated density (wet density) the fully impregnated mass divided by the volume 4.2 oil content the oil content of the test piece may be expressed in two ways: 4.2.1 percentage by volume the volume of the oil divided by the volume of the test piece and multiplied by 1 00 4.2.2 percentage of the volume of the open porosity the volume of the oil divided by the volume of the open porosity and multiplied by 1 00 4.3 open porosity (of the test piece) the oil content after full impregnation divided by the volume of the test piece and multiplied by 1 00 expressed as a percentage by volume 4.4 volume (of the test piece) total volume including the pores 5 Test procedures Depending upon which of the properties is to be determined, some or all of the test procedures in clause 8 are carried out. Table 2 shows the test procedures that are carried out for the property to be determined. The values obtained for the various parameters are inserted in the respective...