ASTM D1765-03

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.
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: 09-Jan-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 D1765-01e1 - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 10-Jan-2003
• Replaced By: ASTM D1765-04 - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Jan-2004
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 10-Jan-2003
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 10-Jan-2003
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 10-Jan-2003
• Referred By: ASTM E1136-19 - Standard Specification for P195/75R14 Radial Standard Reference Test Tire
• Effective Date: 10-Jan-2003
• Referred By: ASTM D4583-21 - Standard Practice for Carbon Black—Calculation of Process Indexes From an Analysis of Process Control Data
• Effective Date: 10-Jan-2003
• Referred By: ASTM D3493-21 - Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample (COAN)
• Effective Date: 10-Jan-2003
• Referred By: ASTM D2414-23 - Standard Test Method for Carbon Black—Oil Absorption Number (OAN)
• Effective Date: 10-Jan-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1765 – 03
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. Scope D 1513 Test Method for Carbon Black, Pelleted—Pour
2
Density
1.1 This classification system is used to classify rubber
2
D 1514 Test Method for Carbon Black—Sieve Residue
grade carbon blacks by the use of a four-character nomencla-
D 2084 Test Method for Rubber Property—Vulcanization
ture system. The first character gives some indication of the
2
Using Oscillating Disk Cure Meter
influence of the carbon black on the rate of cure of a typical
D 2414 Test Method for Carbon Black—Oil Absorption
rubber compound containing the black. The second character
2
Number
gives information on the average surface area of the carbon
2
D 3053 Terminology Relating to Carbon Black
black. The last two characters are assigned arbitrarily.
D 3182 Practice for Rubber—Materials, Equipment, and
1.2 All rubber-grade carbon blacks for which a number is
Procedures for Mixing Standard Compounds and Prepar-
currently assigned at the time of publication of this classifica-
2
ing Standard Vulcanized Sheets
tion system are listed in Table 1 together with some of their
D 3191 Test Methods for Carbon Black in SBR (Styrene-
typical properties.
2
Butadiene Rubber)—Recipe and Evaluation Procedures
1.3 The values stated in SI units are to be regarded as the
D 3192 Test Methods for Carbon Black Evaluation in NR
standard. The values given in parentheses are for information
2
(Natural Rubber)
only.
2
D 3265 Test Method for Carbon Black—Tint Strength
1.4 This standard does not purport to address all of the
D 3493 Test Method for Carbon Black—Oil Absorption
safety concerns, if any, associated with its use. It is the
2
Number of Compressed Sample
responsibility of the user of this standard to establish appro-
D 6556 Test Method for Carbon Black—Total and External
priate safety and health practices and determine the applica-
2
Surface Area by Nitrogen Adsorption
bility of regulatory limitations prior to use.
3. Basis of Classification
2. Referenced Documents
3.1 The first character in the nomenclature system for
2.1 ASTM Standards:
rubber-grade carbon blacks is a letter indicating the effect of
D 412 Test Methods for Vulcanized Rubber and Thermo-
2
the carbon black on the cure rate of a typical rubber compound
plastic Rubbers and Thermoplastic Elastomers—Tension
containing the black. The letter “N” is used to indicate a normal
D 1508 Test Method for Carbon Black, Pelleted Fines and
2
curing rate typical of furnace blacks that have received no
Attrition
special modification to alter their influence on the rate of cure
D 1510 Test Method for Carbon Black—Iodine Adsorption
2
of rubber. The letter “S” is used for channel blacks or for
Number
furnace blacks that have been modified to effectively reduce
the curing rate of rubber. Channel blacks characteristically
1
This classification is under the jurisdiction of ASTM Committee D24 on impart a slower rate of cure to rubber compounds. Thus, the
Carbon Black and is the direct responsibility of Subcommittee D24.41 on Carbon
letter “S” designates a slow cure rate. Blacks may vary
Black Nomenclature and Terminology.
considerably in “curing rate” within each of the two letter
Current edition approved Jan. 10, 2003. Published February 2003. Originally
e1
classifications.
approved in 1965. Last previous edition approved in 2001 as D 1765 – 01 .
2
Annual Book of ASTM Standards, Vol 09.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D1765–03
TABLE 1 Carbon Black Properties
NOTE 1—The iodine adsorption number and DBP number values represent target values. A target value is defined as an agreed upon value on which
producers center their production process and users center their specifications. All other properties shown are averages of typical values supplied by
several manufacturers. Typical properties are dependent upon the target values and may vary from producer to producer at the same iodine adsorption
and DBP absorption numbers because of the differences in processing equipment.
NOTE 2—The cure rate of vulcanizates containin
...