ASTM-D4812:2005 Edition

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D4812-05 Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics

Published By	Publication Date	Number of Pages
ASTM	2005	12

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Categories: 83.140.99 - Other rubber and plastics products, ASTM

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Description

ASTM D4812-05

Historical Standard: Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics

ASTM D4812

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.

Keywords

cantilever beam; impact resistance; plastic molding; unnotched

ICS Code

ICS Number Code 83.140.99 (Other rubber and plastics products)

DOI: 10.1520/D4812-05

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 Conditioning FIG. 3
5	Procedure FIG. 4
6	Report Precision and Bias TABLE 1
7	Keywords X1. CALIBRATION OF PENDULUM-TYPE HAMMER IMPACT MACHINES FOR USE WITH PLASTIC SPECIMENS X1.1 X1.2 X1.3 X1.4 X1.5 X1.6 X1.7 X1.8 X1.9 X1.10 X1.11 X1.12 X1.13 X1.14
8	X1.15 X1.16 X1.17 X1.18 X1.19 X1.20 X1.21 X1.22 X1.23 X1.24 X1.25
9	X2. INSTRUCTIONS FOR THE CONSTRUCTION OF A WINDAGE AND FRICTION CORRECTION CHART X2.1 X2.2 X2.3 X2.4 X2.5 X2.6 FIG. X2.1 FIG. X2.2
10	X3. PROCEDURE FOR THE CALCULATION OF WINDAGE AND FRICTION CORRECTION X3.1 X3.2 X3.3 X3.4 X3.5 X3.6 X3.7 X3.8 X3.9 X3.10 X4. DERIVATION OF PENDULUM IMPACT CORRECTION EQUATIONS X4.1 X4.2 X4.3 X4.4 X4.5 X4.6 FIG. X4.1
11	X4.7 X4.8 X4.9 X4.10 X4.11 X4.12 X5. UNIT CONVERSIONS X5.1 FIG. X4.2

Additional information

Standard Title	D4812-05 Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics
Published Code	ASTM
Publication Date	2005
Pages Count	12
ICS Codes	83.140.99 - Other rubber and plastics products