ASTM  D6175 Radial Crush Strength of Extruded Catalyst and Catalyst Carrier Particles

The ASTM D6175 test method is used to determine the radial crush strength of extruded catalyst and catalyst carrier particles. This test method is designed to determine an extruded catalyst’s capacity to maintain physical integrity while in operation.

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    The ASTM D6175 test method is used to determine how resistant extruded catalysts and catalyst carriers are to compressive force from the side. Extruded catalyst and catalyst carriers with diameters ranging from 16 to 12 inches were used to develop this test method, which was limited to pieces with a length-to-diameter ratio of greater than or equal to 1:1. Other diameters may be relevant to this test procedure. The mean crush strength per millimeter in the range of 0 to 15 Ibf/mm can be determined using this test procedure. 

    Test procedure:

    Individual extrudates from a typical sample are calcined, measured in length, sandwiched between two flat surfaces, and compressed according to ASTM D6175. The test is carried out to determine how much force is required to crush the extrudate. The method is repeated, and the force per millimeter is calculated, as well as the average of all quotients. 

    Video 01: Method to determine the radical crush strength (K) of power metallurgy test specimens

    Specimen size:

    The ASTM D6175 test protocol requires riffling or splitting to acquire a test sample of 50 to 200  individual particles from larger composites. 


    As per ASTM D6175, the crush strength per millimeter (x) calculated for each extrudate, retaining the results to the  nearest tenth unit, is as follows: 

    X= F/L 


    X = the crush strength for one extrudate per millimeter 

    F = the force necessary to crush the extrudate 

    L = the length of the extrudate along its cylindrical axis


    The ASTM D6175 test method is used to determine how resistant extruded catalysts and catalyst carriers are to compressive force from the side.


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