1.1 This test method covers the determination of the susceptibility of ethylene plastics, as defined in Terminology D883, to environmental stress-cracking when subjected to the conditions herein specified. Under certain conditions of stress and in the presence of environments such as soaps, wetting agents, oils, or detergents, ethylene plastics may exhibit mechanical failure by cracking.
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.
5.1 This test method may be used for routine inspection purposes by subjecting a required number of specimens to the test conditions for a specified time and noting the number that fail. The cracking obtained with the test reagent is indicative of what may be expected from a wide variety of surface-active agents, soaps, and organic substances that are not absorbed appreciably by the polymer.
5.2 Environmental stress-cracking is a property that is highly dependent upon the nature and level of the stresses applied and on the thermal history of the specimen (1). Under the conditions of the test method, high local multiaxial stresses are developed through the introduction of a controlled imperfection (2, 3). Environmental stress-cracking has been found to occur most readily under such conditions.
Condition | Specimen Thickness | Notch Depth | Bath Temperature, °C | |||
mmA | in. | mmA | in. | |||
AB | min | 3.00 | 0.120 | 0.50 | 0.020 | 50 |
| max | 3.30 | 0.130 | 0.65 | 0.025 |
|
BB | min | 1.84 | 0.0725 | 0.30 | 0.012 | 50 |
| max | 1.97 | 0.0775 | 0.40 | 0.015 |
|
CC | min | 1.84 | 0.0725 | 0.30 | 0.012 | 100C |
| max | 1.97 | 0.0775 | 0.40 | 0.015 |
|
5.3 Information from this test method is not intended to be used for direct application to engineering problems.
SDO | ASTM: ASTM International |
Document Number | D1693 |
Publication Date | April 1, 2013 |
Language | en - English |
Page Count | 11 |
Revision Level | 13 |
Supercedes | |
Committee | D20.15 |