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1.1 This classification system is used to classify rubber grade carbon blacks by the use of a four-character nomenclature system. The first character gives some indication of the influence of the carbon black on the rate of cure of a typical rubber compound containing the black. The second character gives information on the average surface area of the carbon black. The last two characters are assigned arbitrarily.
1.2 All rubber-grade carbon blacks for which a number is currently assigned at the time of publication of this classification system are listed in together with some of their typical properties. ASTM classification numbers ("N" or "S" designation) not listed in have either been withdrawn or are not currently assigned. The use of inactive or unassigned N# designations is highly discouraged until such a time as the designation is officially reactivated or assigned by subcommittee D 24.41
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
D1508 Test Method for Carbon Black, Pelleted Fines and Attrition
D1510 Test Method for Carbon BlackIodine Adsorption Number
D1513 Test Method for Carbon Black, PelletedPour Density
D1514 Test Method for Carbon BlackSieve Residue
D2414 Test Method for Carbon BlackOil Absorption Number (OAN)
D3053 Terminology Relating to Carbon Black
D3265 Test Method for Carbon BlackTint Strength
D3493 Test Method for Carbon BlackOil Absorption Number of Compressed Sample (COAN)
D6556 Test Method for Carbon BlackTotal and External Surface Area by Nitrogen Adsorption
D7854 Test Method for Carbon Black-Void Volume at Mean Pressure
ICS Number Code 83.040.20 (Rubber compounding ingredients)
ASTM D1765-04, Standard Classification System for Carbon Blacks Used in Rubber Products, ASTM International, West Conshohocken, PA, 2004, www.astm.orgBack to Top