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1.1 ,This test method covers the determination of active sulfur in cutting oils. This test method applies to sulfur reactive with copper powder at a temperature of 150 ,°,C (302 ,°,F) in cutting fluids containing both natural and added sulfur.
Note 1: ,It has not been established by ASTM Subcommittee D02.L0 as to how the active sulfur content thus determined may relate to field performance of the cutting fluid.