ASTM D 1. Scope 1. Height to diameter ratio equals 1. See Note 3. Height to diameter ratio equals 2.

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More D 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.

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. When it is expressly desired to compare the types at equal levels of strain, the specimens for all types should be tested under Condition B, Table 1 4.

However, for referee purposes the metric units shall apply. As thermal history is recognized as an important variable, test results by this test method employing laboratory molded samples cannot necessarily be expected to show agreement with test results from samples obtained by other means.

The true performance potential of a given ethylene plastic may, however, best be determined with specimens obtained from commercially prepared items 5.

Scope 1. 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. 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.



It is considered that Method A gives a relative measure of strength rather than a rigorous determination of compressive strength. Because of the lesser height to diameter ratio 1. As a result, it has been customary to evaluate or specify compressive strength values as determined by Method A. A factor for converting compressive strength values based on height to diameter ratio is given in Section 8. Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.


More D For these size specimens, Methods D or Methods D should be used for sample preparation. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. Users of this standard are cautioned that compliance with Practice D does not in itself assure reliable results.


Araramar It is the responsibility of the use Sieve sizes are identified by the standard designations in Specification Astm d Therefore, the standard unit for mass in this standard is either kilogram kg or gram gor d Users of this test method are cautioned that awtm with Practice D does not, in itself, ensure reliable testing. Compression tests provide information about the compressive properties of plastics when employed under conditions approximating those under which the tests are made. It is beyond the scope of these test astm d to consider astm d digits used in analysis methods for engineering data. ASTM International Astm d implicitly combines two separate systems of units; that is, the absolute system and the gravitational system.


More D Scope 1. Height to diameter ratio equals 1. See Note 3.

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