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ASTM D2240-Durometer Hardness

This document provides information about ASTM D2240 Durometer Hardness testing. It describes that durometer hardness testing measures the hardness of rubber and plastic materials using a durometer gauge, which measures hardness on a scale of 0 to 100. It outlines the test procedure of placing specimens on a hard, flat surface and pressing the durometer indentor into the specimen within one second. It also lists the test parameters of specimen shape, size, number tested, and conditioning temperature and humidity.

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687 views1 page

ASTM D2240-Durometer Hardness

This document provides information about ASTM D2240 Durometer Hardness testing. It describes that durometer hardness testing measures the hardness of rubber and plastic materials using a durometer gauge, which measures hardness on a scale of 0 to 100. It outlines the test procedure of placing specimens on a hard, flat surface and pressing the durometer indentor into the specimen within one second. It also lists the test parameters of specimen shape, size, number tested, and conditioning temperature and humidity.

Uploaded by

Omkar Borde
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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WC-82-04-01 ASTM D2000 Standard Test Methods

ASTM D2240-Durometer Hardness


Durometer Hardness Testing measures the hardness of rubber elastomers and
plastic materials.

The most widely used hardness measuring instrument is called the Durometer. It
measures hardness values in points-that range from 0 to 100.

0 points represent a very soft material, while 100 points represent a very hard
material.

Rubber elastomers are measured using the Shore Type-A scale.

Test Procedure:

 Test specimens are placed on a hard flat


surface.
 The indentor of the durometer gauge is
pressed into the specimen making sure that it is
parallel to the specimen surface.
 The hardness value is read within one
second of firm contact with the specimen.

JET Rubber, Inc. uses an ASKER durometer


gauge that has a peak-load indicator to ensure
that value readings are recorded within one
second.
The gauge is installed on a 1000g constant-load
operating stand. This arrangement keeps
specimens flat and parallel to prevent variance
in measurement values.

Test Parameters:

Specimen Shape: Cylindrical Disk


Specimen Diameter: 1.14” ± 0.02”
Specimen Thickness: 0.49” ± 0.02”
Number of Specimens Tested: 3 to 5
Conditioning and Testing Temperature: 73.4 ± 3.6 °F
Conditioning and Testing Relative Humidity: 50 ± 5%

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