1. Scope

1.1 This classification system covers the classification of 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 Table 1 together with some of their typical properties. ASTM classification numbers ('N' or 'S' designation) not listed in Table 1 have either been withdrawn or are not currently assigned. The use of inactive or unassigned N or S designations is prohibited until such a time as the designation is officially reactivated or assigned by Subcommittee D24.41

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.

ASTM Standards

D1508 Test Method for Carbon Black, Pelleted Fines and Attrition

D1510 Test Method for Carbon Black--Iodine Adsorption Number

D1513 Test Method for Carbon Black, Pelleted--Pour Density

D1514 Test Method for Carbon Black--Sieve Residue

D2414 Test Method for Carbon Black--Oil Absorption Number (OAN)

D3053 Terminology Relating to Carbon Black

D3265 Test Method for Carbon Black--Tint Strength

D3493 Test Method for Carbon Black--Oil Absorption Number of Compressed Sample (COAN)

D6556 Test Method for Carbon Black--Total and External Surface Area by Nitrogen Adsorption

Keywords

carbon black; classification of carbon blacks; industry reference blacks; typical properties of carbon black types;

ICS Code

ICS Number Code 83.040.20 (Rubber compounding ingredients)

DOI: 10.1520/D1765-04A

ASTM International is a member of CrossRef.