ASTM_D_7849_-_18a.pdf

Designation:D784918aStandard Classification forNomenclature of Reference Materials of Committee D241This standard is issued under the fixed designation D7849;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This classification covers instructions for naming thereference materials used by Committee D24.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1510 Test Method for Carbon BlackIodine AdsorptionNumberD1619 Test Methods for Carbon BlackSulfur ContentD2414 Test Method for Carbon BlackOil AbsorptionNumber(OAN)D3265 Test Method for Carbon BlackTint StrengthD3493 Test Method for Carbon BlackOil AbsorptionNumber of Compressed Sample(COAN)D6556 Test Method for Carbon BlackTotal and ExternalSurface Area by Nitrogen Adsorption3.Significance and Use3.1 Standard reference materials are used for calibration andverification of many carbon black tests under the jurisdiction ofD24.This practice defines a systematic means of naming thesereference materials and does so in a manner to clearlydifferentiate between the various reference materials as well astheir version.4.Basis of Classification4.1 ASTM Committee D24 has established five differenttypes of reference materials which serve to improve testprecision of analytical tests on carbon black as well asin-rubber evaluation of carbon black.34.1.1 SRB(Standard Reference Blacks)A set of sevencarbon blacks,six furnace blacks with defined target values foriodine adsorption number(Test Method D1510),STSA(TestMethod D6556),NSA(Test Method D6556),OAN(TestMethod D2414),COAN(Test Method D3493)and TintStrength(Test Method D3265)and one thermal black withdefined values for STSA(Test Method D6556),NSA(TestMethod D6556)and OAN(Test Method D2414).The SRBscan be used to verify analytical test equipment and testprocedures.For OAN and COAN,their application is manda-tory to normalize measured data.4.1.2 ITRB(Industry Tint Reference Black)ITRB repre-sents a standard carbon black of the N330 type.It is used forverification and standardization in the test method for TintStrength(Test Method D3265).4.1.3 INR(Iodine Number Reference,previously designated“HT”)INR consist of three different reference blacks whichhave been heat-treated in order to provide particularly highstability of the iodine number over a long period of time,thatis,over many years.4.1.4 IRB(Industry Reference Black)IRB is a carbonblack of the N330 type which is produced in large quantities inorder to serve as a reference material in rubber compounds.In-rubber properties of this reference black are determinedduring a round robin tests when the material is introduced.4.1.5 STRM(Sulfur Test Reference Materials)Aset of fivecarbon blacks with defined target values for sulfur in carbonblack testing(Test Methods D1619).4.2 Nomenclature:4.2.1 All letters in the designation are in caps.4.2.2 The reference material is identified by its type:SRB,ITRB,INR or IRB.1This classification is under the jurisdiction of ASTM Committee D24 onCarbon Black and is the direct responsibility of Subcommittee D24.41 on CarbonBlack Nomenclature and Terminology.Current edition approved Nov.1,2018.Published November 2018.Originallyapproved in 2014.Last previous edition approved in 2018 as D7849 18.DOI:10.1520/D7849-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Target values and control limits are published on the website of the distributorof these reference materials,Balentine Enterprise Inc.:http:/ ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.2.3 When referring to just the material set,the set numberfollows the type,with no special characters or space a