1、Designation: D7849 18D7849 18aStandard 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 la
2、st 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 the reference materials used by Committee D24.1.2 This standard does
3、not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability ofregulatory limitations prior to use.1.3 This international s
4、tandard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. R
5、eferenced Documents2.1 ASTM Standards:2D1510 Test Method for Carbon BlackIodine Adsorption NumberD1619 Test Methods for Carbon BlackSulfur ContentD2414 Test Method for Carbon BlackOil Absorption Number (OAN)D3265 Test Method for Carbon BlackTint StrengthD3493 Test Method for Carbon BlackOil Absorpti
6、on Number of Compressed Sample (COAN)D6556 Test Method for Carbon BlackTotal and External Surface Area by Nitrogen Adsorption3. Significance and Use3.1 Standard reference materials are used for calibration and verification of many carbon black tests under the jurisdiction ofD24. This practice define
7、s a systematic means of naming these reference materials and does so in a manner to clearly differentiatebetween the various reference materials as well as their version.4. Basis of Classification4.1 ASTM Committee D24 has established fourfive different types of reference materials which serve to im
8、prove test precisionof analytical tests on carbon black as well as in-rubber evaluation of carbon black.34.1.1 SRB (Standard Reference Blacks)A set of seven carbon blacks, six furnace blacks with defined target values for iodineadsorption number (Test Method D1510), STSA (Test Method D6556), NSA (Te
9、st Method D6556), OAN (Test Method D2414),COAN (Test Method D3493) and Tint Strength (Test Method D3265) and one thermal black with defined values for STSA (TestMethod D6556), NSA (Test Method D6556) and OAN (Test Method D2414). The SRBs can be used to verify analytical testequipment and test proced
10、ures. For OAN and COAN, their application is mandatory to normalize measured data.4.1.2 ITRB (Industry Tint Reference Black)ITRB represents a standard carbon black of the N330 type. It is used forverification and standardization in the test method for Tint Strength (Test Method D3265).4.1.3 INR (Iod
11、ine Number Reference, previously designated “HT”)INR consist of three different reference blacks which havebeen heat-treated in order to provide particularly high stability of the iodine number over a long period of time, that is, over manyyears.1 This classification is under the jurisdiction of AST
12、M Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.41 on Carbon BlackNomenclature and Terminology.Current edition approved June 1, 2018Nov. 1, 2018. Published June 2018November 2018. Originally approved in 2014. Last previous edition approved in 20142018 asD7849 14.
13、D7849 18. DOI: 10.1520/D7849-18.10.1520/D7849-18A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Target va
14、lues and control limits are published on the website of the distributor of these reference materials, Balentine Enterprise Inc.: http:/ 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.
15、Becauseit 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 versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 1
16、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.4 IRB (Industry Reference Black)IRB is a carbon black of the N330 type which is produced in large quantities in orderto serve as a reference material in rubber compounds. In-rubber properties of this reference bla
17、ck are determined during a roundrobin tests when the material is introduced.4.1.5 STRM (Sulfur Test Reference Materials)A set of five carbon blacks with defined target values for sulfur in carbon blacktesting (Test Methods D1619).4.2 Nomenclature:4.2.1 All letters in the designation are in caps.4.2.
18、2 The reference material is identified by its type: SRB, ITRB, INR or IRB.4.2.3 When referring to just the material set, the set number follows the type, with no special characters or space as a separator,for example: SRB8.4.2.4 In the case where several materials form a set (like SRB and INR materi
19、als), a letter is added, starting with A andprogressing in alphabetical order. Preferably, the order of the materials is related to a relevant property, such as iodine adsorptionnumber for the INR materials. For ease of readability, a single hyphen (-) or space is added to separate the type letters
20、from theset number, material letter, and, when used, the lot number (for example, SRB-8Aor SRB 8A; SRB-8A2 or SRB 8A2).SRB-8A2).4.2.5 It may occur that a second lot of the same material is produced after depletion of the initial lot. In order to distinguishbetween both lots, a number is added in chr
21、onological order to designate the second and subsequent lots, for example: SRB-8A2(second lot of SRB-8A).NOTE 1While the same letters will be used from one set to the next, the materials carrying the same letter designation may or may not be the samecarbon black.4.3 Examples of how to identify refer
22、ence materials follow:4.3.1 IRB and ITRB:4.3.1.1 The IRB currently in use in 2018 is identified as IRB9.4.3.1.2 The next IRB in the series will be identified as IRB10.4.3.1.3 The ITRB currently in use in 2018 is identified as ITRB2. The original version of this reference material, ITRB, is nolonger
23、commercially available but may still be in use in some laboratories.4.3.1.4 The next ITRB in the series will be identified as ITRB3.4.3.2 SRB and INR are sets.4.3.2.1 The SRB set currently in use in 2018 is identified as SRB8. Materials within SRB8 are SRB-8Athrough SRB-8G rankedin order of tread (A
24、, B, C), carcass (D, E, F), and thermal (G) blacks, and then OAN number within each.4.3.2.2 The next SRB set will be identified as SRB9.4.3.2.3 The INR currently in use in 2018 is identified as INR since it is the first set of this reference material. This material issimilar to the materials identif
25、ied as HT1, HT2, and HT3 that are no longer commercially available. The HT identification doesnot comply with this identification system but will be used historically as long as there is a need to reference the HT materials.4.3.2.4 The current INR set is INRA, INRB, and INRC ranked in order of iodin
26、e number.4.3.2.5 The next INR set will be identified as INR-2A, INR-2B, and INR-2C.4.3.3 STRM is a set.4.3.3.1 The STRM set currently in use in 2018 is identified as STRM. Materials within STRM are STRM-A through STRM-Eranked in increasing order of percent sulfur in carbon black content.4.3.3.2 The
27、next STRM set will be identified as STRM2.5. Keywords5.1 industry reference black; industry tint reference black; INR; iodine number reference; IRB; ITRB; SRB; standard referenceblackASTM International takes no position respecting the validity of any patent rights asserted in connection with any ite
28、m mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical comm
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30、eting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive,
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