D Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol This Model fulfills the requirements of ASTM D and B Designation: D – 95 (Reapproved )e1An American National Standard Standard Test Method for Indentation Hardness of Rig. Buy ASTM D TEST METHOD FOR INDENTATION HARDNESS OF RIGID PLASTICS BY MEANS OF A BARCOL IMPRESSOR from.
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ASTM D e1.
ASTM D – BARCOL HARDNESS
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. The values given in parentheses are for information only.
Barcol Hardness ASTM D2583
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of d283 limitations prior to use.
Within the range of hardness measured by these Impressors the Model No.
Any test specimen preparation, conditioning, dimensions, or testing parameters or combination thereof covered in the materials speci? If there are no material speci? Table 1 of Classi?
The higher the reading the harder the material. Summary of Test Method 4. Current edition approved October 10, Originally published as D — Last previous edition D — Take care to avoid sliding or scraping while the indentor is in contact with the surface being tested.
Record the maximum reading.
NOTE 2—It is recommended that measurements be made with the Model Impressor when values above 90 are obtained with the Model Impressor and that measurements be made with the Model Impressor when values less than 20 are obtained with the Model No. Values below 10 using the Model Impressor are inexact and should not be reported.
NOTE 3—Drift in readings from the maximum may occur in some materials and can be nonlinear with time. Nonhomogeneous Material Reinforced Plastics 30 40 50 60 70 The indicator should now read If it does not, loosen the lock-nut and turn the lower plunger guide in or out to obtain a reading.
If these readings cannot be obtained, subsequent measurements are not valid. Impressions should not be made within 3 mm 1? NOTE 4—Curved surfaces may be more difficult to support.
When the load is applied, bending and spring action in the specimen should be avoided.
Barcol Hardness ASTM D
astk Preparation and Operation of Apparatus 8. Place the Impressor and the material to be tested or the calibration disk on a solidly supported,?
If softer supporting surfaces are used, a falsely low instrument reading may occur. Set the legs on the same surface or on solid material of the same thickness, so that the indentor is perpendicular to the surface being tested. Number of Readings This greater variation may be caused mainly by the difference in hardness between resin and? On reinforced plastics, in order to aatm a variance-of-average of 0. Eight plastic materials of different hardness were evaluated with six different Barcol Impressors.
Precision astj Bias 6 No. For each material, all the samples were prepared at one source. Each laboratory obtained three test results for each material. For the materials shown, the indicated number of individual determinations were averaged to calculate each test result as follows: The following explanations of Ir and IR The data in Table 2 should not be rigorously applied to acceptance or rejection of ashm, as those data are speci?
Users of this test method should apply the principles outlined in Practice E to generate data speci? The principles of 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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