We perform the isothermal secant bulk modulus test by ASTM D6793 to measure a liquid’s compressibility. The greater the value of the isothermal secant bulk modulus, the less compressibility the liquid has. This is used in designing high-performance hydraulic fluid and braking systems.
For additional information on this test method or to purchase a copy of the method, please click HERE to open a new window and visit the ASTM website.
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