D2596-97
Test Method for Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method)

1.1 This test method covers the determination of the load-carrying properties of lubricating greases. Two determinations are made:

1.1.1 Load-Wear Index (formerly called Mean-Hertz Load), and

1.1.2 Weld Point, by means of the Four-Ball Extreme-Pressure (EP) Tester.

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