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ASTM-D4812:2011 Edition

ASTM-D4812:2011 Edition

$44.96

D4812-11 Standard Test Method for Unnotched Cantilever Beam Impact Resistance of Plastics

Published By Publication Date Number of Pages
ASTM 2011 12
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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 1The 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 5), and other differences in machine design).

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

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.

Note 2This standard and ISO 180, Method U address the same subject matter, but differ in technical content.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Method
Significance and Use
2 Apparatus
FIG. 1
3 FIG. 2
4 Test Specimens
FIG. 3
5 Conditioning
Procedure
FIG. 4
6 Report
Precision and Bias
TABLE 1
7 Keywords
A1. INSTRUCTIONS FOR THE CONSTRUCTION OF A WINDAGE AND FRICTION CORRECTION CHART
A1.1
A1.2
A1.3
A1.4
A1.5
A1.6
FIG. A1.1
FIG. A1.2
8 A2. PROCEDURE FOR THE CALCULATION OF WINDAGE AND FRICTION CORRECTION
A2.1
A2.2
A2.3
A2.4
A2.5
A2.6
A2.7
A2.8
A2.9
A2.10
X1. CALIBRATION OF PENDULUM-TYPE HAMMER IMPACT MACHINES FOR USE WITH PLASTIC SPECIMENS
X1.1
X1.2
X1.3
9 X1.4
X1.5
X1.6
X1.7
X1.8
X1.9
X1.10
X1.11
X1.12
X1.13
X1.14
X1.15
X1.16
X1.17
X1.18
X1.19
10 X1.20
X1.21
X1.22
X1.23
X1.24
X2. DERIVATION OF PENDULUM IMPACT CORRECTION EQUATIONS
X2.1
X2.2
X2.3
X2.4
X2.5
X2.6
X2.7
X2.8
FIG. X2.1
FIG. X2.2
11 X2.9
X2.10
X2.11
X2.12
X3. UNIT CONVERSIONS
X3.1

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