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ASTM D792-13

Historical Revision

Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

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1.1 These test methods describe the determination of the specific gravity (relative density) and density of solid plastics in forms such as sheets, rods, tubes, or molded items.

1.2 Two test methods are described:

1.2.1 Test Method A—For testing solid plastics in water, and

1.2.2 Test Method B—For testing solid plastics in liquids other than water.

1.3 The values stated in SI units are to be regarded as the standard.

1.4 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1This standard is not equivalent to ISO 1183–1 Method A. This test method provides more guidelines on sample weight and dimension. ISO 1183-1 allows testing at an additional temperature of 27 ± 2°C.

5.1 The specific gravity or density of a solid is a property that is conveniently measured to identify a material, to follow physical changes in a sample, to indicate degree of uniformity among different sampling units or specimens, or to indicate the average density of a large item.

5.2 Changes in density of a single material are due to localized differences in crystallinity, loss of plasticizer, absorption of solvent, or to other causes. It is possible that portions of a sample differ in density because of their differences in crystallinity, thermal history, porosity, and composition (types or proportions of resin, plasticizer, pigment, or filler).

5.3 Density is useful for calculating strength-weight and cost-weight ratios.

SDO ASTM: ASTM International
Document Number D792
Publication Date Nov. 1, 2013
Language en - English
Page Count 6
Revision Level 13
Supercedes
Committee D20.70
Publish Date Document Id Type View
July 1, 2020 D0792-20 Revision
Nov. 1, 2013 D0792-13 Revision
June 15, 2008 D0792-08 Revision
Dec. 10, 2000 D0792-98 Revision
Dec. 10, 2000 D0792-00 Revision