ASTM D518 PDF

ASTM Standards: D Test Method for Rubber Deterioration—Surface. Cracking2. D Test Method for Rubber Deterioration—Surface. Ozone Cracking. ASTM D Cutting Die Method B, Procedure B1 (formerly D Method A), UltraLife Cutting Dies by CCSi. CCSi manufactures these high quality UltraLife. Find the most up-to-date version of ASTM D at Engineering

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A number in parentheses indicates the year of last e518. A superscript epsilon indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. It does not apply to testing of electrical insulation or other rubber parts 4.

It is the uncertain, but because the results from duplicate specimens responsibility of the user of this sstm to establish appro- tested in different locations do not ordinarily give the same priate safety and health practices and determine the applica- values. No exact relation between the results of the test and bility of regulatory limitations prior to use.

ASTM D – Standard Test Method for Rubber Deterioration-Surface Cracking

The test is principally of value when used for comparisons between two or 2. Referenced Documents more rubber compounds. The block shall be 3. Summary of Test Methods mm 5. Both of the Sections mm atm of the face carrying the specimens shall be Method A—Exposure of Straight Specimens Elon 5 to 8 gated rounded with a 3-mm 0.

Astm d518 pdf

Current edition approved Nov. Originally published as D — Last previous edition D —86 Reapproved Test Specimens and number or the development of any characteristic or 6. Report laboratory test sheets having a thickness of 1. Fasten the other end of each specimen in the same way to the 9.

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Apparatus opposite long side of the block. Mount the aluminum shields 9. Each strip shall be 13 mm 0. Holes shall be drilled through the mm thickness of face of the block. Several types of used.

Observation of cracks shall be 19 mm high joined two or more to hold the specimens.

The made with a 7-power magnifying glass. Record the time of the channel sides have three holes drilled 8. If diameter 32 mm 1. It shall be mm 24 in. Three crosspieces each mm 8 in. E518 crosspieces shall be mounted 19 mm 0. Each crosspiece shall be held in place by three 50 mm 2 in.

The screws shall pass through the panel and through the crosspieces, 32 mm 1.

These screws shall protrude above the surface of the panel to a height of about 35 mm 1. Observations shall be made with a 7 magnifying glass.

If desired, the exposure may subsequently be continued for the Procedure purpose of observing the rate of growth of the cracks or the The minimum distance between the specimens shall be 6 mm 0. As a result of this procedure, 25 mm 1 in. Apparatus specimen will be covered by the wooden strips, which will act The remaining 43 mm 1. The frame shall be planed aluminum strips and fastening them with nuts and washers, as smooth and painted with two coats of clear lacquer 3 or spar shown in Fig.

The time of appearance of initial surface cracking for each speci- grain shall be in the lengthwise direction of the specimen. L length after stretching, and a Lo length before stretching. Observation shall be made with a 7-power magnifying 10 5. If desired, the exposure may subsequently be continued for the purpose of observing the rate Fasten the stretched specimen to the frame in such a manner of growth of the cracks or the development of any character- that the fasteners or staples driven through the pencilled dots istic or unusual surface effects.

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These awl points are spaced according to the holes in a Report template for the required elongation, as shown in Fig. Because of the taper, the elongation for any one area will vary By placing bench marks at regular intervals along the center line of the tapered strip prior to Precision and Bias stretching, it is possible to determine the percentage elongation Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

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If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service e-mail ; or through the ASTM website.