Position paper on astm d3363 74 reapproved 1989 standard test method for film hardness by pencil test the standard test method for film hardness by pencil test, astm d3363 r1989 is used by a wide variety of producers and users of coatings. Pencil hardness testing equipment united testing systems. Pencils from different manufacturers, or even pencils of different lots from the same manufacturer, will not necessarily have exactly equal hardness of the lead even though they have the same hardness rating. To perform a pencil hardness test, graphite pencils of varying hardness are moved across a coatings surface. Vf2378 tqc pencil hardness test according wolff wilborn 750g complies with.
This standard is issued under the fixed designation e. The test method allows the use of pencils which have a known hardness grade to be moved over the surface to be tested at a fixed angle and pressure. Current specialized glass can be produced with a hardness close zstm sapphire, which is 9 on the mohs scale of hardness compared to 7 for standard glass. Astmd3363052011e1 standard test method for film hardness by pencil test. The tqc pencil hardness test according wolff wilborn provides in a simple method to test the scratch hardness of coatings. Kalidindi, raghavan subasri, in antiabrasive nanocoatings, 2015. In this test, pencils in a range of 6b to 8h hardnessgrade are used.
The standard is the astm standard d336300, standard test method for film hardness by pencil test. To the metals industry, it may be thought of as resistance to permanent deformation. Pencil hardness tester 5800 complete set of 20 pencils from 9b to 9h pencil sharpener abrasive 400 grit paper carrying case operating manual standards astm d 3363 bs 3900e19 ecca ecca t iso 15184 hardness ordering information cat. The pencil hardness tester offers an easy method for the determination of film hardness on a flat substrate. A number in parentheses indicates the year of last reapproval. If using the astm d 3363 method and the lead has cut through or scratched the surface of the coating, select the next softest pencil and repeat the test 2. The pencil is moved scratching over the surface under a 45 angle with a constant pressure. Astm d 05 standard test method for film hardness by pencil test 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. Astm d 3363 standard test method for film hardness by pencil test. Introduction triple pencil tester complies with the requirements of astm d3363 and iso 15184 standard, through leaving a superficial trace on the dry coating film with a certain pencil hardness, the surface will be variably damaged by the hardest pencil to evaluate passfail or hardness.
There is variation in pencil hardness on the same coating and material, by different pencil manufactures. This is also true for coil coaters and paint manufacturers for the coil coating industry. Astm d 3363 00 pdf free download civil engineers standards. This part of en 523 specifies the procedure for determining the relative hardness of an organic coating on a metallic substrate, by means of pencils of known hardness. 2 scratch hardness the hardest pencil that will not.
You may purchase the astm standard from the american. Aug 04, 2019 astm d 05 standard test method for film hardness by pencil test 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. Astm d 05 standard test method for film hardness by pencil test. D1005 test method for measurement of dryfilm thickness of organic coatings using micrometers. Three points are touched on the tested surface roller pencil lead the angle between pencil and the tested surface 45. Astm test method d 3363 allows the use of pencils of known hardness to be moved over the surface of the test sample at a fixed angle and pressure to perform the test. Oct 12, 2017 this part of en 523 specifies the procedure for determining the relative hardness of an organic coating on a metallic substrate, by means of pencils of known hardness. D823 practices for producing films of uniform thickness of paint, varnish, and related products on test panels.
Evaluation of the film hardness by a pencil hardness test. Gardco wolff wilborn pencil scratch hardness tester. Delivered with a set of 20 kohinoor pencils and a pencil sharpener. Astm d4366 16 standard test methods for hardness of. Astm d336305 standard test method for film hardness by. This rapid test has not been found to be useful in comparing the pencil hardness of different coatings. To the metallurgist, it means resistance to penetration.
To the design engineer, it is a measure of flow stress. Tin coatings astm d 05 had good adhesion to the substrate. Practical hardness testing made simple 4 it is commonly believed that, for practical purposes, in a definitely limited range, there is an approximate correspondence between hardness data and a range of tensile strength results. A critical study on scratch resistance test methods. The pencil tester is an effective method to test coatings for their hardness and resistance to scratches and wear. The pencil leads can be exchanged quickly and easily. The pencil hardness test is used to measure the hardness of the paint film. Complete the titration within 5 min after the buffer addition. Description 5800 wolffwilborn pencil hardness 5801 pencil set 20 pcs, for 5800.
A noncured paint film has a lower pencil hardness, which makes it more likely to be damaged. Flatten the end of the lead 90 degrees to the pencil axis using finegrit sand or emery paper. The results of this test indicates the degree of curing of the paint film. On pencil hardness there is variation between pencil manufactures in graphite, clay and binder composition. To the lubrication engineer, it means resistance to wear. Pencil scratch hardness measurement is a quick check tool to measure hardness of solgel and other organic coatings on any rigid substrate. Listed below are common american society for testing and materials astm standards that reference hardness testing. The pencil hardness tester travels across the coating sample. Paul, mn or equivalent, current edition approved march 25, this is a paint property that can be varied by the addition of matting agents or dulling agents during.
Introduction to hardness testing asm international. Pencil hardness tester wolffwilborn is the most common brand astm d3363 does allow for manual testing with no holder required, but for best and consistent results, you should use a pencil hardness tester 2. While this assumption is generally correct if taken with due caution, one must remember that no indication regarding. Standard test method for film hardness by pencil test1 this standard is issued under the. A greater solvent resistance indicates that the paint film is more stable and durable for outdoor exposure. Standard test method for coating flexibility of prepainted sheet. D 05standard test method for film hardness by pencil test1 this standard is issued under the fixed desig.
The test method is fully described in astm d336392a and ecca t4 1984. Active standard astm d3363 developed by subcommittee. The purpose of this test protocol is to determine the hardness of a coated film through the use of pencil hardness measurements. Store are in electronic adobe acrobat pdf format, however some. Then an optical assessment is carried out to see which pencil hardness damages the surface.
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. Pencil set designed for pencil hardness testing common brands include mitsubishi uni 3. Astm d 2621 standard test method for infrared identification of vehicle solids from. This test method is similar in content but not technically equivalent to iso 15184. Pencil hardness tester a pencil hardness gauge is used to determine the hardness of an organic coating. If the titration requires more than 20 ml of the titrating solution, dilute the sample and repeat the test. Introduction to hardness testing hardness has a variety of meanings.
Astm d3363 is a coating hardness evaluation test micom. Aug 21, 2019 current specialized glass can be produced with a hardness close zstm sapphire, which is 9 on the mohs scale of hardness compared to 7 for standard glass. Permission rights to photocopy the standard may also be secured from the astm website. The pencil hardness test gauge is equipped with 8 leads located in the following standard positions. Under astm, fourteen pencil leads in the range from 6b to 6h are used. Standard test method for film hardness by pencil test. The pencil hardness test is an effective method to test coatings for their hardness and their scratch wear resistance. Hardness tester pencil hardness tester 3 in 1 distributor.
Iso 15184, astm d3363, jis k 5600, eccat41, bs 3900e19, snv 371, sis 184187, nen 5350, mil c 27 227 vf2379 tqc pencil hardness test according wolff wilborn 500g there is no standard applicable however the. The models differ in load on the pencil tip in grams. Astm d336305 standard test method for film hardness by pencil test. Dec 05, 2018 standard test method for film hardness by pencil test1 this standard is issued under the. The results are recorded as the rating of hardest pencil that does not scratch or mar the surface of the coating. Pencil hardness test method astm d3363 this test method describes a simple and rapid evaluation of a coated materials resistance films hardness to scratch effects due to the sliding of pencils of various hardness 6b to 6h, under load, over the surface of a coated substrate, for approximately 10 to 12 mm 12. Astm d3363 standard test method for film hardness by. Pencil hardness measurements have been used by the coatings industry for many years to determine the hardness of clear and pigmented organic coating films. Every effort should be made to standardize the hardness of the lead used and the technique followed. A pencil hardness test is a type of evaluation method that is performed to determine the hardness of a material, typically coating materials. Astm d 4017 standard test method for water in paints and paint materials by karl fischer method.
It is more useful in providing relative ratings for a series of coated panels exhibiting significant differences in pencil hardness. Newage testing instruments recommends that you obtain a copy of the appropriate standard for your application and that you read and understand the standard prior to testing. Pencil hardness tester 5800 complete set of 20 pencils from 9b to 9h pencil sharpener abrasive 400 grit paper carrying case operating manual standards astm d 3363 bs 3900e19 ecca ecca t iso 15184 din en 5234. The degree of hardness of the pencil which damages the surface is taken as a measurement for scratch hardness. In this method, according to astm d336305 2000, a set of pencils with increasing order of hardness. If using the astm d 3363 method and the lead has cut through or scratched the surface of the. Astmd3363052011e1 standard test method for film hardness by pencil test astm d3363 052011e1 standard test method for film hardness by pencil test customer service. This test method has also been used to determine the cure of these coatings, especially when forced dried using heat.
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