Active Standard ASTM D176 | Developed by Subcommittee: D09.01
Book of Standards Volume: 10.01
Historical (view previous versions of standard)
Significance and Use
The melting point is useful in selecting a filling or treating compound that will not flow at the operating temperature of the device in which it will be used. It is also essential that it shall not be so high as to injure the insulation at the time of pouring. This test method is suitable for specification, classification, and for control of product uniformity.
1.1 These test methods cover physical and electrical tests for solid filling and treating compounds used for electrical insulation which are fusible to a liquid without significant chemical reaction. Compounds that are converted to the solid state by polymerization, condensation, or other chemical reaction are not included in these test methods.
1.2 These test methods are designed primarily for asphaltic or bituminous compounds, waxes, and fusible resins, or mixtures thereof, although some of these methods are applicable to semisolid types such as petrolatums. Special methods more suitable for hydrocarbon waxes are contained in Test Methods D1168.
1.3 Provide adequate ventilation when these tests involve heating.
1.4 The test methods appear in the following sections:
|A-C Loss Characteristics and Permittivity (Dielectric Constant)||51-54|
|Volume Resistivity-Temperature Characteristics||46-49|
|Coefficient of Expansion or Contraction||22-41|
|Flash and Fire Points||9 and 10|
|Loss on Heating||11 and 12|
|Melting Point||5 and 6|
|Penetration||15 and 16|
|Softening Point||7 and 8|
|Viscosity||13 and 14|
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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. For specific hazard statements, see 12.1 and 31.5.
Note 1—There is no similar or equivalent IEC or ISO 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.
D5 Test Method for Penetration of Bituminous Materials
D6 Test Method for Loss on Heating of Oil and Asphaltic Compounds
D70 Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method)
D71 Test Method for Relative Density of Solid Pitch and Asphalt (Displacement Method)
D88 Test Method for Saybolt Viscosity
D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester
D127 Test Method for Drop Melting Point of Petroleum Wax, Including Petrolatum
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D937 Test Method for Cone Penetration of Petrolatum
D1168 Test Methods for Hydrocarbon Waxes Used for Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
E28 Test Methods for Softening Point of Resins Derived from Naval Stores by Ring-and-Ball Apparatus
E102 Test Method for Saybolt Furol Viscosity of Bituminous Materials at High Temperatures
ICS Number Code 29.035.01 (Insulating materials in general)