Active Standard ASTM D2319 / D2319M | Developed by Subcommittee: D02.05
Book of Standards Volume: 05.01
Historical (view previous versions of standard)
Significance and Use
4.1 Pitch does not go through a solid-liquid phase change when heated and therefore does not have a true melting point. As the temperature is raised, pitch softens and becomes less viscous. The softening point is arbitrarily defined and must be determined by a closely controlled method that must be carefully followed if test results are to be reproducible.
1.1 This test method covers the determination of the softening point above 80°C [176°F] of pitch. Test Method D3104 gives comparable results.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D61 Test Method for Softening Point of Pitches (Cube-in-Water Method)
D3104 Test Method for Softening Point of Pitches (Mettler Softening Point Method)
D4296 Practice for Sampling Pitch
E1 Specification for ASTM Liquid-in-Glass Thermometers
ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products)