ASTM D1765-04e1

Standard Classification System for Carbon Blacks Used in Rubber Products

SCOPE
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 ASTM classification numbers ("N" or "S" designation) not listed in have either been withdrawn or are not currently assigned.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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2003
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.41 - Carbon Black Nomenclature and Terminology

Relations

• Replaces: ASTM D1765-04 - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Jan-2004
• Replaced By: ASTM D1765-04a - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Jul-2004
• Referred By: ASTM D2414-23 - Standard Test Method for Carbon Black—Oil Absorption Number (OAN)
• Effective Date: 01-Jan-2004
• Referred By: ASTM E1136-19 - Standard Specification for P195/75R14 Radial Standard Reference Test Tire
• Effective Date: 01-Jan-2004
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 01-Jan-2004
• Referred By: ASTM D4583-21 - Standard Practice for Carbon Black—Calculation of Process Indexes From an Analysis of Process Control Data
• Effective Date: 01-Jan-2004
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 01-Jan-2004
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 01-Jan-2004
• Referred By: ASTM D3493-21 - Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample (COAN)
• Effective Date: 01-Jan-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation: D 1765 – 04
Standard Classification System for
1
Carbon Blacks Used in Rubber Products
This standard is issued under the fixed designation D 1765; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1
e NOTE—Editorial corrections were made to the following: Note 2, Footnotes C and D and D Stress column of Table 1;
paragraphs 4.2, 4.2.1, and 5.2; Notes 2 and 3; Table 2; and removed A1.1 and Note 1 from Annex A1 in July 2004.
1. Scope D 1508 Test Method for Carbon Black, Pelleted Fines and
Attrition
1.1 This classification system is used to classify rubber
D 1510 Test Method for Carbon Black—Iodine Adsorption
grade carbon blacks by the use of a four-character nomencla-
Number
ture system. The first character gives some indication of the
D 1513 Test Method for Carbon Black, Pelleted—Pour
influence of the carbon black on the rate of cure of a typical
Density
rubber compound containing the black. The second character
D 1514 Test Method for Carbon Black—Sieve Residue
gives information on the average surface area of the carbon
D 2084 Test Method for Rubber Property—Vulcanization
black. The last two characters are assigned arbitrarily.
Using Oscillating Disk Cure Meter
1.2 All rubber-grade carbon blacks for which a number is
D 2414 Test Method for Carbon Black—Oil Absorption
currently assigned at the time of publication of this classifica-
Number
tion system are listed in Table 1 together with some of their
D 3053 Terminology Relating to Carbon Black
typical properties. ASTM classification numbers (“N” or “S”
D 3182 Practice for Rubber—Materials, Equipment, and
designation) not listed in Table 1 have either been withdrawn
Procedures for Mixing Standard Compounds and Prepar-
or are not currently assigned. The use of inactive or unassigned
ing Standard Vulcanized Sheets
N# designations is highly discouraged until such a time as the
D 3191 Test Methods for Carbon Black in SBR (Styrene-
designation is officially reactivated or assigned by subcommit-
Butadiene Rubber)—Recipe and Evaluation Procedures
tee D 24.41
D 3192 Test Methods for Carbon Black Evaluation in NR
1.3 The values stated in SI units are to be regarded as the
(Natural Rubber)
standard. The values given in parentheses are for information
D 3265 Test Method for Carbon Black—Tint Strength
only.
D 3493 Test Method for Carbon Black—Oil Absorption
1.4 This standard does not purport to address all of the
Number of Compressed Sample
safety concerns, if any, associated with its use. It is the
D 6556 Test Method for Carbon Black—Total and External
responsibility of the user of this standard to establish appro-
Surface Area by Nitrogen Adsorption
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Basis of Classification
2. Referenced Documents 3.1 The first character in the nomenclature system for
2 rubber-grade carbon blacks is a letter indicating the effect of
2.1 ASTM Standards:
the carbon black on the cure rate of a typical rubber compound
D 412 Test Methods for Vulcanized Rubber and Thermo-
containing the black. The letter “N” is used to indicate a normal
plastic Rubbers and Thermoplastic Elastomers—Tension
curing rate typical of furnace blacks that have received no
special modification to alter their influence on the rate of cure
1
This classification is under the jurisdiction of ASTM Committee D24 on
of rubber. The letter “S” is used for channel blacks or for
Carbon Black and is the direct responsibility of Subcommittee D24.41 on Carbon
furnace blacks that have been modified to effectively reduce
Black Nomenclature and Terminology.
the curing rate of rubber. Channel blacks characteristically
Current edition approved Jan. 1, 2004. Published February 2004. Originally
impart a slower rate of cure to rubber compounds. Thus, the
approved in 1965. Last previous edition approved in 2003 as D 1765 – 03.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
letter “S” designates a slow cure rate. Blacks may vary
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
considerably in “curing rate” within each of the two letter
Standards volume information, refer to the standard’s Document Summary page on
classifications.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D1765–04
TABLE 1 Carbon Black Properties
NOTE 1—The iodine adsorptio
...