ASTM D1765-10

Standard Classification System for Carbon Blacks Used in Rubber Products

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 ASTM classification numbers (“N” or “S” designation) not listed in Table 1 have either been withdrawn or are not currently assigned.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 standard. No other units of measurement are included in this standard.
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-2009
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.41 - Carbon Black Nomenclature and Terminology

Relations

• Replaces: ASTM D1765-06 - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 01-Jan-2010
• Referred By: ASTM D3493-21 - Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample (COAN)
• Effective Date: 01-Jan-2010
• Referred By: ASTM E1136-19 - Standard Specification for P195/75R14 Radial Standard Reference Test Tire
• Effective Date: 01-Jan-2010
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 01-Jan-2010
• Referred By: ASTM D2414-23 - Standard Test Method for Carbon Black—Oil Absorption Number (OAN)
• Effective Date: 01-Jan-2010
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 01-Jan-2010
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 01-Jan-2010
• 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-2010

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
Designation:D1765 −10
StandardClassification System for
1
Carbon Blacks Used in Rubber Products
This standard is issued under the fixed designation D1765; 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 (´) 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 D1513 Test Method for Carbon Black, Pelleted—Pour Den-
sity
1.1 This classification system covers the classification of
D1514 Test Method for Carbon Black—Sieve Residue
rubber-grade carbon blacks by the use of a four-character
D2414 Test Method for Carbon Black—Oil Absorption
nomenclature system.The first character gives some indication
Number (OAN)
of the influence of the carbon black on the rate of cure of a
D3053 Terminology Relating to Carbon Black
typical rubber compound containing the black. The second
D3265 Test Method for Carbon Black—Tint Strength
character gives information on the average surface area of the
D3493 Test Method for Carbon Black—Oil Absorption
carbon black. The last two characters are assigned arbitrarily.
Number of Compressed Sample (COAN)
1.2 All rubber-grade carbon blacks for which a number is
D6556 Test Method for Carbon Black—Total and External
currently assigned at the time of publication of this classifica-
Surface Area by Nitrogen Adsorption
tion system are listed in Table 1 together with some of their
typical properties. ASTM classification numbers (“N” or “S”
3. Basis of Classification
designation) not listed in Table 1 have either been withdrawn
3.1 The first character in the nomenclature system for
or are not currently assigned.The use of inactive or unassigned
rubber-grade carbon blacks is a letter indicating the effect of
N or S designations is prohibited until such a time as the
the carbon black on the cure rate of a typical rubber compound
designation is officially reactivated or assigned by Subcommit-
containingtheblack.Theletter“N”isusedtoindicateanormal
tee D24.41
curing rate typical of furnace blacks that have received no
1.3 The values stated in SI units are to be regarded as
special modification to alter their influence on the rate of cure
standard. No other units of measurement are included in this
of rubber. The letter “S” is used for channel blacks or for
standard.
furnace blacks that have been modified to effectively reduce
1.4 This standard does not purport to address all of the
the curing rate of rubber. Channel blacks characteristically
safety concerns, if any, associated with its use. It is the
impart a slower rate of cure to rubber compounds. Thus, the
responsibility of the user of this standard to establish appro-
letter “S” designates a slow cure rate. Blacks may vary
priate safety and health practices and determine the applica-
considerably in “curing rate” within each of the two letter
bility of regulatory limitations prior to use.
classifications.
3.2 Thesecondcharacterinthesystemisadigittodesignate
2. Referenced Documents
the average surface area of the carbon black as measured by
2
2.1 ASTM Standards:
nitrogen surface area. The surface area range of the carbon
D1508 Test Method for Carbon Black, Pelleted Fines and
blacks has been divided into ten arbitrary groups, and each has
Attrition
been assigned a digit to describe that group. These groups are
D1510 Test Method for Carbon Black—Iodine Adsorption
as follows:
Number
Average Nitrogen
Group No.
2
Surface Area, m /g
0 >150
1
ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD24on
1 121 to 150
Carbon Black and is the direct responsibility of Subcommittee D24.41 on Carbon
2 100 to 120
Black Nomenclature and Terminology.
3 70to99
Current edition approved Jan. 1, 2010. Published January 2010. Originally
4 50to69
approved in 1965. Last previous edition approved in 2006 as D1765 – 06. DOI:
5 40to49
10.1520/D1765-10.
6 33to39
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7 21to32
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
8 11to20
Standards volume information, refer to the standard’s Document Summary page on
90to10
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D1765−10
TABLE 1 Carbon Black Properties
NOTE 1—The iodine adsorption number and oil absorption number values represent target values. A target value is defined as an agreed upon value
onwhichproducerscentertheirproductionprocessanduserscentertheirspecifications.Allotherpropertiesshownareaveragesoftypicalvaluessupplied
by several manufacturers. Typica
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D1765–06 Designation: D1765 – 10
Standard Classification System for
1
Carbon Blacks Used in Rubber Products
This standard is issued under the fixed designation D1765; 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 (´) 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
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)
notlistedinTable1haveeitherbeenwithdrawnorarenotcurrentlyassigned.TheuseofinactiveorunassignedNorSdesignations
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 standard. No other units of measurement are included in this standard.
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
2
2.1 ASTM Standards:
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
3. Basis of Classification
3.1 The first character in the nomenclature system for rubber-grade carbon blacks is a letter indicating the effect of the carbon
black on the cure rate of a typical rubber compound containing the black. The letter “N” is used to indicate a normal curing rate
typical of furnace blacks that have received no special modification to alter their influence on the rate of cure of rubber. The letter
“S” is used for channel blacks or for furnace blacks that have been modified to effectively reduce the curing rate of rubber. Channel
blacks characteristically impart a slower rate of cure to rubber compounds. Thus, the letter “S” designates a slow cure rate. Blacks
may vary considerably in “curing rate” within each of the two letter classifications.
3.2 The second character in the system is a digit to designate the average surface area of the carbon black as measured by
nitrogen surface area. The surface area range of the carbon blacks has been divided into ten arbitrary groups, and each has been
assigned a digit to describe that group. These groups are as follows:
1
This classification system is under the jurisdiction ofASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.41 on Carbon Black
Nomenclature and Terminology.
´1
Current edition approved Aug. 1, 2006. Published August 2006. Originally approved in 1965. Last previous edition approved in 2005 as D1765–05a . DOI:
10.1520/D1765-06.
Current edition approved Jan. 1, 2010. Published January 2010. Originally approved in 1965. Last previous edition approved in 2006 as D1765 – 06. DOI:
10.1520/D1765-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D1765 – 10
TABLE 1 Carbon Blac
...