ASTM D349 – Standard Test Methods for Laminated Round Rods Used for Electrical Insulation (Withdrawn 2020)
Description:
Significance and Use
7.1 This test method is designed to provide data for the control and specification of materials and for characterization purposes in research and development of new materials. It is possible that the tensile properties will vary with the size of specimens and the speed of testing. Consequently, these factors along with others noted herein must be controlled where precise comparative results are desired.
Scope
1.1 These test methods cover the procedures for testing rigid round rods used in electrical insulation. These round rods include many types made from fibrous sheets of basic materials, such as cellulose, glass, or nylon in the form of paper, woven fabrics, or mats, bonded together by natural or synthetic resins, or by adhesives. Such round rods include vulcanized fiber and thermosetting laminates as well as round rods made from cast, molded, or extruded natural or synthetic resins, with or without fillers or reinforcing materials.
1.2 The procedures appear in the following sections:
| Section | |
| Compressive strength (axial) | 20 – 25 |
| Density | 28 – 30 |
| Dielectric strength | 31 – 39 |
| Flexural strength | 13 – 19 |
| Tensile strength | 7 – 12 |
| Water absorption | 26-27 |
1.3 The values stated in inch-pound units are to be regarded as the standard.
ASTM D3487