ASTM D429 PDF

ASTM B ASTM A ASTM F — A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.

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ASTM B ASTM A ASTM F — A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the Department of Defense. Scope 1. The values given in parentheses are for information only. 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.

Referenced Documents 2. Current edition approved Dec. Published January Originally approved in Last previous edition approved in as D — 02a. Order Adjunct No. Original adjunct produced in No further reproductions authorized. D — 03e1 FIG. With slight modi? Methods A, B, C, and D are applicable in the case of many products in which rubber is used for controlling vibration.

Terminology Adhesion Failure Terminology 4. Apparatus 6. The moving head of the machine shall travel at the uniform rate of 0. The machine shall be provided with a recording device to give the total force in Newtons or poudsforce at the conclusion of the test.

A machine of not more than 40 kN 10 lbf capacity will be found suitable in most cases. A typical adhesion test assembly is shown in Fig. Specially molded laboratory specimens shall be attached by means of threaded studs on the metal parts as shown in Fig. Standard Test Specimens 7. The metal plates shall have smooth? The cylindrical shape is used to eliminate sharp corners and to give uniform distribution of the pulling force.

NOTE 2—While a mm2 2 in. The diameter of this test specimen shall be The sample also lends itself to testing the effectiveness of different processing techniques and various adhesive systems. Laboratory Preparation of Standard Test Specimens 8. However, other metals may be used if in conformity with the essential dimensions. Prepare smoothly machined test faces of the metals in accordance with any test method for securing adhesion that may be under investigation.

Clean or treat surfaces to be adhered in accordance with the method being investigated. A typical mold and test piece are shown in Fig. The test method of assembly is illustrated in Fig. The mold is so constructed that there is obtained after vulcanization approximately 0.

Prior to vulcanization, take great care to keep the surfaces to be adhered clean and free of dust, moisture, or other foreign material. Do not touch surfaces with the hands. Choose the time and temperature of cure according to the rubber compound used. At the conclusion of the cure, take care in removing the specimens from the mold to avoid subjecting the adhered surfaces to stress before the specimens have cooled.

Test Specimens from Production Parts 9. Hollow-mill a specimen out of the production part and? In such cases, the test method of preparation shall be similar to that given in 9.

Procedure Apply a steady tension load at the speci? Record the total force at the time of failure. Record the type or types of failure, and express in accordance with the adhesion failure terminology described in 4. Estimate and record the percentages of the various types of failures.

Calculation In case of rupture of the rubber, the adhesion value is recognized as being higher than that reported. Report D — 03e1 Precision and Bias 5 The results are obtained by measuring the force necessary to separate a rubber from a metal surface.

The test provides valuable data for development and control of rubber compounds and test methods of bonding, and it also serves as a screening test for the evaluation of various bonding agents or techniques, or both.

Adhesion Failure Terminology Apparatus The head of the machine shall travel at the uniform rate of 0. D — 03e1 in. The grip shown in Fig. Standard Test Specimen The test specimen shall be so prepared that the bonded area of 25 by 25 mm 1 by 1 in.

D — 03e1 nizing press. The time and temperature of cure shall be in accordance with the system being investigated. This is done by cutting with a scissors, handknife, or other suitable equipment. The edges of the specimen may then be buffed on a belt sander to bring the edge of the rubber? Take care not to overheat the metal parts or the rubber and not to reduce the width of the sample being tested beyond the tolerances described. NOTE 6—Present experience indicates negligible differences in results between samples buffed clean and samples tested without buffing, because edges of metal parts are not speci?

Preparation of Standard Test Specimen Mask both ends with pressure-sensitive tape so that only the area described in Section 17 will be available for adhesion. See Fig. The inside mold dimensions parallel to the longitudinal axis of the metal part shall be mm for nominal 5 in.

The dimension along the transverse axis of the metal part can be altered according to the number of pieces required for any one cure. This will leave sufficient length of rubber strip for fastening in the grip shown in Fig. Solvent-wash rubber surface to be adhered or treat in accordance with the method being investigated.

Freshly milled rubber need not be solvent wiped. Cure the whole assembly in accordance with the method being investigated. Prior to assembly and vulcanization, take great care to keep the surfaces to be adhered clean and free of dust, moisture, or other foreign material. Before the load is applied, strip the rubber from the metal plate for a distance of approximately 2 mm 0. Place the tab in the grip and apply a steady load at the rate of 50 mm 2. Use the autographic recorder in order to show graphically the adhesion values over the full length of the test specimen.

NOTE 7—This specimen lends itself to the determination of the relative effect of environmental conditions on possible bond deterioration. Specimens may be exposed unstressed or under a constant, relatively low bond stress. It is recommended that one of the standard ASTM environmental exposure conditions be used.

If environments other than the above are used, they shall be described completely. This should include the conditions of the exposure such as time, temperature, etc. NOTE 8—Stripping the rubber from the plate initially, and as necessary during the test, is done to observe more clearly adhesion to the substrate rather than the tear strength of the stock.

Calculations While intended to be applied where rubber is bonded to supporting rigid pieces, it may not cover such cases where the support, while being of high modulus material, has a low rigidity due to small transverse dimensions, as in the case of rubber bonded to metal wires, cords or thin sheets.

The particular geometry of the test piece produces, in most cases, an interfacial failure between the rubber and conical part, because of a stress concentration at the tip of the cone. The machine shall be provided with a recording device to give the total force in newtons or poundsforce at the conclusion of the test. A machine of not more than 40 kN or 10 lbf capacity will be found suitable in most cases.

These grips can be of two types: 1 a simple slip-in type which engages in the grooved section of the conical specimen, or 2 a threaded stud with a locknut.

This could be a combination? Take care in centering and adjusting the test specimen so the tension is symmetrically distributed in the cross section during the test.

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ASTM D test standard determines the adhesion of rubber to rigid metal substrates. This test standard is divided into methods A through H. Common application examples that use tests in ASTM D are vehicle engine mounts, vehicle suspension bushings, rubber-coated metal parts, and rubber-lined tanks and containers. Most of the tests involve orthogonal tensile strength or peel strength of the adhesion interface. Some of the tests are aimed at shear strength of that adhesion interface. Our engineers are familiar with ASTM D and can help guide you through the testing process with the proper equipment. Although our engineers can provide guidance, we recommend you purchase the official ASTM D International Standard to achieve the best results.

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CCSi UltraLife Specimen Molds: ASTM D429

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ASTM D429 Rubber to Metal Adhesion Test Equipment

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