ASTM G132-96 (R2018) pdf free download.Standard Test Method for Pin Abrasion Testing.
1.1 This test method covers a laboratory procedure for determining the wear resislance of a material when relative motion is caused between an abrasive cloth. paper. or plastic film and a contacting pin of the test material. The principal factors and conditions requiring attention when using this type of apparatus to measure wear are discussed.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
3. Terminology
3.1 Refer to Terminology G40 for definitions of terms related to this test method.
4. Summary of Test Method
4. I For the pin abrasion test method, two pin specimens are required. One is of the test material. The other is of a reference material. Each pin, in turn, is positioned perpendicular to the abrasive surface, which usually is mounted on. or supported by. a Oat circular disk, another flat surface, or the cylindrical surface of a drum. The test machine permits relative motion between the abrasive surface and the pin surface. The wear track of a pin describes a continuous, non-overlapping path such as a spiral. helix, or saw-t(x)th curve, preferably with a displacenient between successive passes sutlicient to allow the other pin to trace a parallel track in the intervening space. Fig. I shows some possible arrangements. The pin specimen is pressed against the abrasive surface with a specified loading by means of dead weights or another suitable loading system. Rotation of the pin about its axis during testing is optional. Note, however, that results with and without pin rotation or with different loading systems may differ.
4.2 The amount of wear is determined b> weighing both specimens before and atler testing. Mass loss values should he COfl veiled to volume losses using the best available values of specimen densities. The use of length changes to indicate the amount of wear is not recommended for the purposes of this test method, and no procedure for processing such data is included in this test nwthi.
4.3 Wear results are reported as a volume loss and as the wear volume normalized with respect to the applied normal load, to the wear path length, and to the mean wear of the reference specimen on the same type of abrasive. The reference specimen wear is included in the calculation in order to correct for abrasivity variations (see 4.5 and 10.2).ASTM G132 pdf download.