1、Designation: D7849 18Standard 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 revisi
2、on. 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 purpor
3、t 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
4、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. Refere
5、nced Documents2.1 ASTM Standards:2D1510 Test Method for Carbon BlackIodine AdsorptionNumberD2414 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 fo
6、r 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
7、 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 four differenttypes of reference materials which serve to improve testprecision of analytical tests on carbon black as well as
8、in-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) an
9、d 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 mea
10、sured 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 di
11、fferent 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 serv
12、e 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.4.2 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
13、or IRB.4.2.3 When referring to just the material set, the set numberfollows the type, with no special characters or space as aseparator, for example: SRB8.4.2.4 In the case where several materials form a set (likeSRB and INR materials), a letter is added, starting with A andprogressing in alphabetic
14、al order. Preferably, the order of the1This 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 June 1, 2018. Published June 2018. Originallyapproved
15、 in 2014. Last previous edition approved in 2014 as D7849 14. DOI:10.1520/D7849-18.2For 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 pa
16、ge 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 wa
17、s 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.1materials is
18、 related to a relevant property, such as iodineadsorption number for the INR materials. For ease ofreadability, a single hyphen (-) or space is added to separate thetype letters from the set number, material letter, and, whenused, the lot number (for example, SRB-8A or SRB 8A;SRB-8A2 or SRB 8A2).4.2
19、.5 It may occur that a second lot of the same material isproduced after depletion of the initial lot. In order to distin-guish between both lots, a number is added in chronologicalorder to designate the second and subsequent lots, for example:SRB-8A2 (second lot of SRB-8A).NOTE 1While the same lette
20、rs will be used from one set to the next,the materials carrying the same letter designation may or may not be thesame carbon black.4.3 Examples of how to identify reference materials follow:4.3.1 IRB and ITRB:4.3.1.1 The IRB currently in use in 2018 is identified asIRB9.4.3.1.2 The next IRB in the s
21、eries will be identified asIRB10.4.3.1.3 The ITRB currently in use in 2018 is identified asITRB2. The original version of this reference material, ITRB,is no longer commercially available but may still be in use insome laboratories.4.3.1.4 The next ITRB in the series will be identified asITRB3.4.3.2
22、 SRB and INR are sets.4.3.2.1 The SRB set currently in use in 2018 is identified asSRB8. Materials within SRB8 are SRB-8A through SRB-8Granked in order of tread (A, B, C), carcass (D, E, F), andthermal (G) blacks, and then OAN number within each.4.3.2.2 The next SRB set will be identified as SRB9.4.
23、3.2.3 The INR currently in use in 2018 is identified as INRsince it is the first set of this reference material. This materialis similar to the materials identified as HT1, HT2, and HT3 thatare no longer commercially available. The HT identificationdoes not comply with this identification system but
24、 will be usedhistorically as long as there is a need to reference the HTmaterials.4.3.2.4 The current INR set is INRA, INRB, and INRCranked in order of iodine number.4.3.2.5 The next INR set will be identified as INR-2A,INR-2B, and INR-2C.5. Keywords5.1 industry reference black; industry tint refere
25、nce black;INR; iodine number reference; IRB; ITRB; SRB; standardreference blackASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the vali
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