This standard is issued under the fixed designation C ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee C08 on. Abrasion Resistance of Refractory Materials at Room Temperature1 This standard is issued under the fixed designation C/CM; the number immediately. ASTM C – Download as PDF File .pdf), Text File .txt) or read online. ASTM C

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Connect the vacuum gauge to a T-fitting in the abrasive supply line. Flare the tubing at one end to sit snugly inside a 9. This test method can also be applied to castable refractories see Metric Dimensions, Practice C and Practice C and plastic refractories see Practice C Report the results as a hole through the specimen. If the readings on the gauges differ by more than 6. Regulate the air pressure to kPa [65 psi]. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Provide an orifice approximately 4. Several factors were found to cause statistically significant effects on measured results see Section When connected with the abrasion tester, ensure that the feed mechanism delivers the abrading media in the specified time of 6 15 s. Regulate the air pressure to the pressure indicated by the most recent calibration of the abrasion tester.

Replace any components that are worn prior to calibration. Summary of Test Method 3. For brick samples test an unbranded surface. Two test results that do not differ by more than the repeatability interval shall be considered to be from the same population; conversely, two test results that do differ by more than the repeatability interval shall be considered to be from different populations.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. A nonuniform, or unsymmetrical wear pattern indicates that the abrasion tester is not set up properly for example, the nozzle is not perpendicular to the specimen plate, the nozzle is not securely fixed into place, the nozzle to specimen distance is incorrect, the air pressure is varying, etc.


This will allow the operator to push the glass tubing up until the rod touches the venturi, ensuring a 2 mm [0. Determine the volume of the specimens by measurement of length, width, and thickness to the nearest 0. This sleeve is glued or astn in place inside the atm.

Air pressure as specified in this test method is kPa [65 psi] measured by a gauge capable to 6 6. The glass tube is placed through the sleeve in the tubing nut, compressing the grommet within the nut.

Take the statistically significant effect of this small tube inside diameter variation into consideration.

For the ruggedness test, flint glass tube inside diameters of 4. Two test results that do not differ by more than the reproducibility interval shall be considered to be from the same population; conversely, two test results that do differ by more than the reproducibility interval shall be considered to be from different populations.

This is done by using a brass rod, 4. Report the calibration value of the glass plates, the air pressure used, and the calibration date for the last calibration event run prior to running the samples. Include the date of the calibration, the air pressure used, the calibration value, and the event that triggered the calibration in the log entry. Cleanly cut the ends of the glass tube and do not fire polish them. Fit the nozzle tightly into the grommet in order to achieve adequate vacuum see 8.

In this case, dry the sample as in 8. Calculation and Report 9.

ASTM C-704

Additionally, calibrate the abrasion tester any time an abnormality occurs in the test such as erratic results or a hole being worn in the glass nozzle. Turn on the air pressure. Ensure that there are not any flow obstructions between the gauge and the gun. Current edition approved March 1, Replace any parts as necessary and calibrate the abrasion tester in accordance with Section 7 before proceeding.


Ensure that the main supply funnel has sufficient volume to hold the required g of silicon carbide abrading medium. Position the specimen such that the abrasion pattern is centered on the surface of the plate.

ASTM C – Free Download PDF

Used for weighing the abrading media and test specimens. Permission rights to photocopy the standard cc704 also be secured from the ASTM website www. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Only the most abrasion resistant materials can be 25 mm [1 in.

Aatm can be achieved by using a second glass plate under the calibration plate as a spacer, or by adjusting the height of the sample holding platform.

This standard is subject to revision at any time by the aztm technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

We need your help to maintenance this website. Individually measure and choose all nozzle tubes to conform to a specified 4.

If the abrasion plate results do not meet the standard, adjust the air pressure to the gun and run the calibration procedure again using a new glass sstm each time until an abrasion of 9. Check the length and diameter of each tube prior to use. Originally approved in Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

One by mm 4 by 4 in. Ideal glass tube 3 Detailed prints for the construction of the test chamber are available at a nominal cost from ASTM International Headquarters.