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Significance and Use
4.1 Pellet hardness is related to several carbon black characteristics. Among these are mass strength and attrition. The subsequent level of dispersion obtained in some mixed compounds containing the carbon black may be affected by pellet hardness. Acceptable pellet hardness must be agreed to by the user and the producer.
Note 1: Test Method is the preferred standard for testing of individual pellet hardness. It is recognized that Test Method relies on operator judgement, thus adding an additional source of variation for this test.
1.1 This test method covers a method for measuring the hardness of individual pellets of carbon black.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1511 Test Method for Carbon Black--Pellet Size Distribution
D1799 Practice for Carbon Black--Sampling Packaged Shipments
D1900 Practice for Carbon Black--Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
D5230 Test Method for Carbon Black--Automated Individual Pellet Hardness
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
ICS Number Code 83.040.20 (Rubber compounding ingredients)
UNSPSC Code 12171603(Carbon black)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D3313-12e1, Standard Test Method for Carbon Black—Individual Pellet Hardness, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top