Standard Historical Last Updated: Aug 16, 2017 Track Document
ASTM D4812-05

Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics

Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics D4812-05 ASTM|D4812-05|en-US Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics Standard new BOS Vol. 08.02 Committee D20
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Scope

1.1 This test method covers the determination of the resistance of plastics to breakage by flexural shock, as indicated by the energy extracted from standardized pendulum-type hammers, mounted in standardized machines, in breaking standard specimens with one pendulum swing. The result of this test method is reported as energy absorbed per unit of specimen width.

Note 1

The pendulum-type test instruments have been standardized in that they must comply with certain requirements, including a fixed height of hammer fall that results in a substantially fixed velocity of the hammer at the moment of impact. Pendulums of different initial energies (produced by varying their effective weights) are recommended for use with specimens of different impact strengths. Moreover, manufacturers of the equipment are permitted to use different lengths and constructions of pendulums (with resulting possible differences in pendulum rigidities (see Section ), and other differences in machine design).

1.2 The values stated in SI units are to be regarded as standard. The values given in brackets are for information only.

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.

Note 2

This standard and ISO 180, Method 1U, are similar in content but are not technically equivalent.

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Details
Book of Standards Volume: 08.02
Developed by Subcommittee: D20.10
Pages: 12
DOI: 10.1520/D4812-05
ICS Code: 83.140.99