ASTM D4329 PDF

ASTM D tests for fluorescent UV exposure of plastics. It covers specific procedures and test conditions based on practices ASTM G and ASTM G This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Plastics. ASTM D – Designation: D – 05 Standard Practice for Fluorescent UV Exposure of Pla.

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Last previous edition approved in as D – NOTE 2—Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G D — 05 Standard Practice for Fluorescent UV Exposure of Plastics1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, asym the case of revision, the year of last revision.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the f4329.

A number in parentheses indicates the year of last reapproval. D3429 exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure.

For measurements 8 Fischer, R. Calculate retention of characteristic property in accordance with Practice D when it is reported.

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. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test. The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number of separate exterior and laboratoryaccelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.

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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. Therefore, no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 8 that describes the specific operating conditions used.

Typically, flat plaques or disks are used for accelerated weathering studies. Obtain mutual agreement between all concerned parties for the specic exposure cycle used.

Signicant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice.

Up to 20 test samples are mounted in the QUV and subjected to a cycle of exposure to intense ultraviolet radiation followed by moisture exposure by condensation. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Parts may be accommodated depending on size. NOTE 5—Since the stability of the le specimen may also be timedependent, users are cautioned that over prolonged exposure periods, or where small aatm in the order of acceptable limits are anticipated, comparison of exposed specimens with the le specimen may not be valid.

Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO

This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. Measure ambient temperature at a maximum distance of mm [6 in. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

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This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

Hemispherical on 37 Tilted Surface. All specimens shall be exposed simultaneously in the same device. Standards can be obtained from appropriate standard authorities.

ASTM D4329

Suggested aluminum alloys are, ast An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials. Precision and Bias Measurements visual or instrumental should be made within a standardized time period or as agreed upon between the interested parties. Refer to Practice G for detailed information on the caveats applicable to use of results obtained e4329 accordance with this practice.