Shore d gauges are recommended where the shore a rating is greater than 90. Shore s1 modular digital durometer for astm d2240 and iso. The shore duromter a and d scales of hardness are commonly used for rubber and soft polymers such as polyolefins, polyurethanes, vinyl, and fluoropolymers. The shore hardness gauge is a reliable instrument for measuring the impression hardness of soft materials such as coatings, plastics and rubber. Oo scale durometers ptcs shore oo durometer gauge measure the hardness of polyethylene foam roll, sponge rubber, very soft rubber. Shore durometer hardness testing of rubber and plastics. The astm test method designation is astm d2240 00 and is generally used in north america. Shore hardness testing 129 technical specifications test scales available a or d scale standards conforms to din 53505, astm d2240, iso r868 result display hardness result shore pressure foot o18mm applications a scale soft rubber, natural rubber products, neoprone, polyester, soft pvc, leather, thiokol, nitrille rubbers, etc. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. Standard test method for rubber propertydurometer hardness1.
Any specification may be referred to as either a shore or type for example, shore a 70 durometer or type a 70 durometer. Shore a scale is applicable for rubber and soft plastics whereas shore d is for hard. Astm d2240 standard test method for rubber propertydurometer hardness. Astm d2240 05 standard test method for rubber property. Shore d scale durometers test the hardness of pipeline coating, hard rubber, acrylic, delrin, kevlar, pvc, nylon, lexan, and epoxies. Shore durometer hardness testing of rubber and plastics matweb. Astm d2240 durometers allows for a measurement of the initial hardness, or the indentation. The shore durometer is a device for measuring the hardness of a material, typically of polymers, elastomers, and rubbers. Digital zwickroell 3 hardness tester to shore hardness tester zwickroell 3 connected to a pc applications these electronic hardness testers shore a, d, b, c, d0, 0, 00, 000 are suitable for the following applica. D618 practice for conditioning plastics for testing. An astm designation number identifies a unique version of an astm standard.
Shore a shda for soft to hard materials such as soft rubber, elastomers, neoprene, silicone, etc. Both methods measure the resistance of plastics toward indentation and provide an empirical hardness value that doesnt correlate well to other properties or fundamental characteristics. Shore a hardness, shore d hardness and asker c hardness. Astm d224000 shore hardness of soft materials ap note. Click here to download a pdf of the shore hardness scale. Shore a scale is applicable for rubber and soft plastics whereas shore.
Uhmw product data ultrahigh molecular weight polyethylene. This standard is issued under the fixed designation d 2240. With the check device the accuracy of shore hardness testers is controlled. Shore durometer selection guide for rubber and plastics indentation hardness testing to astm d2240, iso 7916 and iso 868.
This article refers to the 2 most commonly used in the roller industry. For onsite testing on the product, analog versions with and without dragpointer are available. Astm d2240 test material testing micom laboratories. The most common standards for measuring hardness are astm d2240, din 53505, bs 2719, and iso 7619.
Shore a hardness what is a shore a hardness and why is it. Shore d hardness test durometer scale plastic materials. The material rubber from which the test blocks are made is fairly stable, however, it is strongly recommended that calibration of. The shore a hardness measurement is often colloquially called durometer or duro. These standards define a gauge reading on a standard sample with a. D49 practice for rubberstandard conditions for testing. Durable metal cases are rugged enough for a production environment. D785 test method for rockwell hardness of plastics and electrical insulating. This should be done in accordance with the methods indicated in astm d2240. The shore durometer is an instrument used for measuring the materials hardness, generally rubbers, elastomers, and polymers. A scale consists of 7 colorcoded rubber test blocks of various type a durometer hardness values ranging from 30 durometer to 90 durometer, and are housed in a convenient, rigid, customfit protective box. Astm d2240 15e1 standard test method for rubber property.
Nov 17, 2014 any specification may be referred to as either a shore or type for example, shore a 70 durometer or type a 70 durometer. Featuring an 18mm footer that offers high stability and conforms to all international standards, the ad100 is the ideal durometer for a wide range of shore hardness measuring applications. Shore hardness gauge din 53505 iso 868 astm d2240 tqc. Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Astm d785 standard test method for rockwell hardness of plastics and electrical insulating materials published by astm on march 1, 2008 this test method covers two procedures for testing the indention hardness of plastics and related plastic electrical insulating materials by means of the rockwell hardness tester. Astm d2240 standard test method for rubber property, durometer hardness. Standard test method for rubber propertydurometer hardness. Carbon black to find similar documents by classification. The model 306l type a durometer is designed to measure astm american society for testing and materials d2240 type a hardness. Active standard astm d2240 developed by subcommittee. Durometer hardness is used to determine the relative hardness of soft materials, usually plastic or. If a result using the the shore a durometer exceeds 90, one should use the shore d durometer. D 374 test methods for thickness of solid electrical insu.
A written calibration report for any durometer covered by current astm d2440 or astm f1957 specifications is available from ptc metrology. Test methods used to measure shore d hardness are astm d2240 and iso 868. Hardness numbers have no units and are commonly given in the r, l, m, e and k scales. Automotive, coating industry, constructionbuilding maintenance, laboratory, paint, galvanize. Shore a vs shore d hardness 165 wambold road, harleysville, pa 19438 18005236688 2157236051 fax 2157992518 shore hardness astm d2240 shore hardness is a relative measure of exactly what the term implies hardness. A number in parentheses indicates the year of last. Shore durometer hardness testing of plastics is described, and conversion charts correlating various scales are presented. Used to measure the hardness of rubber and plastics according astm d2240, din 53505, iso 868 and iso 7619. Astm d1415 18 standard test method for rubber property. After finishing operations please make sure that the gauge is clean and put it back. Apr 19, 20 shore a vs shore d hardness 165 wambold road, harleysville, pa 19438 18005236688 2157236051 fax 2157992518 shore hardness astm d 2240 shore hardness is a relative measure of exactly what the term implies hardness. The shore a hardness scale measures the hardness of flexible mold rubbers that range in hardness from very soft and flexible, to medium and somewhat flexible, to hard with almost no flexibility at all. Hardness is defined as a materials resistance to indentation when a static load is applied. Micom offers astm d2240 shore hardness testing as part of its plastics testing services.
Ptc instruments shore d scale classic style durometer. The principle used to measure hardness is based on measuring the resistance force of the penetration of a pin into the test material under a known spring load. Tests are carried out on cured rubber according to astm d2240, and on a complete o ring according to astm d1414. The shore durometer is a device for measuring the hardness of a material, typically of polymers. Astm d2240 00 shore hardness of soft materials ap note free download as pdf file. Shore a vs shore d hardness 165 wambold road, harleysville, pa 19438 18005236688 2157236051 fax 2157992518 shore hardness astm d 2240 shore hardness is a relative measure of exactly what the term implies hardness. Durometer hardness is used to determine the relative hardness of soft materials, usually plastic or rubber. Semirigid plastics can also be measured on the high end of the shore. Shore a hardness testing is performed using a durometer, which was developed by albert ferdinand shore in the 1920s. The ex durometer is designed for measuring the hardness of various types of rubbers and plastics. The ad100c type c shore durometer, astm d2240 is the genesis of years of experience offering high quality durometers to discriminating users. There are a few different methods to measure hardness. D2240 test method for rubber propertydurometer hardness.
D scale consists of 3 test blocks ranging from 20 to 80 durometer. Shore hardness gauge din 53505 iso 868 astm d2240 tqc sheen. Lower numbers indicate less resistance and softer materials. Micom offers astm d2240 shore hardness testing as part of its plastics testing services astm d2240 u ses and factors to be considered. Shore hardness testing 1 technical specifications scale shore a or shore d resolution 0. The tqc shore hardness gauge is a reliable instrument for measuring the impression hardness of soft materials such as coatings, plastics and rubber. Asker durometers offer optional peak indicators to more closely monitor the difference between the peak reading.
The test methods employed vary greatly from a field applied test to a very controlled laboratory test. If youve ever been to the movies, admired a piece of sculpture, marveled at detailed architectural ornamentation or used a telephone. Shore durometer hardness testing of plastics the hardness testing of plastics is most commonly measured by the shore durometer test or rockwell hardness test. Type a and c indentor d2240 03 2 c the display for type m durometers shall indicate from 0 to 100 with no less than 100 equal divisions at a rate of one hardness point for each 0. This test is performed on cured rubber sheets per astm d2240, and on finished orings per astm d1414. This test method is widely used for composites and polymer testing. This test method covers twelve types of rubber hardness measurement devices known as durometers. Durometer shore hardness test manual ld0550, ld0551. Rex gauge company has been a leader in the durometer hardness gauge industry for over 70 years.
The easy operation allows for rapid testing with repeatable results. If a result using shore d durometer is below 20, one should use the shore a durometer. The model 307l type d durometer is designed to measure astm american society for testing and materials d2240 type d hardness. The test measures the penetration of a specified indentor into the material under specified conditions of. They are easytouse, portable and very accurate with a high degree of repeatability. The procedure for determining indentation hardness of substances classified as thermoplastic elastomers, vulcanized thermoset rubber, elastomeric materials, cellular materials, gellike materials. The shore a hardness measurement is called durometer. Feb 15, 2012 used to measure the hardness of rubber and plastics according astm d2240, din 53505, iso 868 and iso 7619. Prosthesis made with such material should pos sess physical and mechanical properties that are compatible to that of human skin 3.
Shore hardness, especially shore a and shore d, is commonly used for determining foam hardness, soft plastic hardness and rubber hardness, like in rubber oring testing. This allows the two models to accurately measure different hardness ranges. Business coating laboratories, paint production standards astm d2240, din 53505, iso 868. Astm d2240, din 53505, iso 868 features made of anodised aluminum and stainless steel drag pointer gives the maximum reading of the hardness revolving graduation scale test block included scope of supply shore hardness test calibration block carrying case ordering information ld0550 tqc shore a hardness test. Astm c66115, standard test method for indentation hardness of elastomerictype sealants by means of a durometer, astm international, west conshohocken, pa, 2015. Epdm 70 durometer astm d2000 m3ba710 a14 b14 c12 f19 fda conforming title 21 cfr 177. You may never have heard of us, but youve seen our products at work. If a result using shore a durometer is below 10 it is incorrect. Rex gauge a leader in durometer hardness gauges for over. Shore durometer 3 relation between astm d2240 hardness and elastic modulus a semiempirical relation between the astm d2240 hardness and the youngs modulus for elastomers has been derived by gent. The test measures the penetration of a specified indentor into the material under specified conditions of force and time. Available in shore a, d, e astm d2240 compliant and asker c hardness scales. Sep 20, 2016 shore a hardness testing is performed using a durometer, which was developed by albert ferdinand shore in the 1920s. Equipped with a drag indicator, which holds the highest measured result.
If a timed hardness is desired, force is applied for the required time and then. Astm d785 standard test method for rockwell hardness of plastics and electrical insulating materials published by astm on march 1, 2008 this test method covers two procedures for testing the indention hardness of plastics and related plastic electrical insulating materials by means of the rockwell hardness. Because of the popularity of the shore hardness method, a durometer is often referred to as a shore durometer. The shore 00 hardness scale measures rubbers and gels that are very soft. Astm d2240 standard test method for rubber property.
Type shore a durometer shore a durometer is appropriate for measuring the hardness of specimens that are flat, parallel, and of a certain minimum thickness. Recently, jis standard and iso standard have been drastically revised and details of hardness tester of rubber and method of measuring hardness are changed. The hardness value is determined by the penetration of the durometer indenter foot into the sample. Astm d2240 durometers allow for a measurement of the initial hardness, or the indentation hardness after a given period of time. Asker hand held durometers measure hardness from sponge to hard rubber and plastics, covering the range of shore d, shore a, asker c and asker f hardness scales. Shore hardness is a relative measure of exactly what the term implies hardness. Shore s1 modular digital durometer for astm d2240 and iso 7619 rubber and plastic hardness testing.
These durometers can be used either with a test stand or handheld. The two positector shd models look and operate identically, and vary only in the spring pressure and shape of the intender tip. Hardness and durometer are used interchangeably in the roller. These shore electronic hardness testers are used for determining the hardness of plastics and rubber to iso 76191, astm d2240, iso 868, nft 51109 and bs 903 part a26.
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