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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 gradually softens or becomes less viscous. For this reason, the determination of the softening point must be made by an arbitrary, but closely defined, method if the test values are to be reproducible.
4.2 This test method is useful in determining the consistency of pitches as one element in establishing the uniformity of shipments or sources of supply.
1.1 This test method covers the determination of the softening point of pitches having softening points in the range from 50 to 180°C by this test method, and gives results comparable to those obtained by Test Method above 176°F (80°C).
1.2 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A314 Specification for Stainless Steel Billets and Bars for Forging
D2319 Test Method for Softening Point of Pitch (Cube-in-Air Method)
D4296 Practice for Sampling Pitch
ICS Number Code 93.080.10 (Road construction)
UNSPSC Code 30121602(Pitch)
ASTM D3104-14, Standard Test Method for Softening Point of Pitches (Mettler Softening Point Method), ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top