1.1 This test method covers laboratory procedures for
determining the resistance of materials to sliding wear. The
test utilizes a block-on-ring friction and wear testing machine
to rank pairs of materials according to their sliding wear
characteristics under various conditions. 1.2 An important
attribute of this test is that it is very flexible. Any material
that can be fabricated into, or applied to, blocks and rings can
be tested. Thus, the potential materials combinations are
endless. In addition, the test can be run with various
lubricants, liquids, or gaseous atmospheres, as desired, to
simulate service conditions. Rotational speed and load can also
be varied to better correspond to service requirements. 1.3 Wear
test results are reported as the volume loss in cubic
millimetres for both the block and ring. Materials of higher
wear resistance will have lower volume loss. 1.4 This standard
does not purport to address all of the safety concerns, if any,
associated with its use. It is the responsibility of