ASTM D3233 for Measurement of Extreme Pressure Properties of Fluid Lubricants
ASTM D3233 Standard Test Methods for Measurement of Extreme Pressure Properties of Fluid Lubricants (Falex Pin and Vee Block Methods)
TEST METHODS A AND B
15. Report
15.1 Report the true load value at which failure occurred.
15.2 If no failure is obtained, report the last true load run, with a plus (+) sign after the value.
16. Precision and Bias
16.1 The precision of these test methods as determined by statistical examination of interlaboratory results is as follows (see Note 15):
16.1.1 Repeatability - The difference between two test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material, would in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
Test Method A, 27 % of the mean
Test Method B, 24 % of the mean
16.1.2 Reproducibility - The difference between two, single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
Test Method A, 40 % of the mean
Test Method B, 43 % of the mean
16.2 Bias - The procedure in this test method has no bias because the value of the Falex Extreme Pressure Failure Load can be defined only in terms of a test method.
NOTE 15 - The precision data were derived from results of cooperative tests on L-XI-1-2-A, B, C, D, and E, covered in Table 1 and Table 2. These are the same reference fluids used and described in Test Method D2783.
17. Keywords
17.1 extreme pressure; Falex Pin and Vee Block; load-carrying; lubricant; wear
