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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 18449.1-2024: Metallic materials - Knoop hardness test - Part 1: Test method Status: Valid GB/T 18449.1: Historical versions
Basic dataStandard ID: GB/T 18449.1-2024 (GB/T18449.1-2024)Description (Translated English): Metallic materials - Knoop hardness test - Part 1: Test method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H22 Classification of International Standard: 77.040.10 Word Count Estimation: 34,310 Date of Issue: 2024-05-28 Date of Implementation: 2024-12-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 18449.1-2024: Metallic materials - Knoop hardness test - Part 1: Test method---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 77:040:10 CCSH22 National Standards of People's Republic of China Replaces GB/T 18449:1-2009, partially replaces GB/T 9790-2021 Knoop hardness test for metal materials Part 1: Test methods Metallicmaterials-Knoophardnesstest- (ISO 4545-1:2023,MOD) Released on 2024-05-28 2024-12-01 implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and instructions 1 5 Principle 2 6 Hardness Tester 3 7 Sample 4 8 Test Procedure 4 9 Uncertainty of results 7 10 Test Report 7 Appendix A (Normative) Determination of Knoop hardness of metals and other inorganic coatings 8 Appendix B (normative) Periodic verification of the hardness tester, diagonal length measuring system and indenter by the user 12 Appendix C (Informative) Adjustment of the Kohler Illumination System 14 Appendix D (Informative) Uncertainty of Hardness Measurement 15 Appendix E (Informative) Traceability of Knoop hardness measurement 20 Appendix F (Informative) CCM-Hardness Working Group 23 Reference 24ForewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting: This document is part 1 of GB/T 18449 Knoop hardness test for metallic materials: GB/T 18449 has been published as follows part: --- Part 1: Test methods; --- Part 2: Verification and calibration of hardness testers; --- Part 3: Calibration of standard hardness blocks; --- Part 4: Hardness value table: This document replaces GB/T 18449:1-2009 "Metallic materials Knoop hardness test Part 1: Test method" and partially replaces GB/T 9790-2021 "Vickers and Knoop microhardness test for metal and other inorganic coatings of metallic materials": GB/T 18449:1-2009 is the main version, and part of GB/T 9790-2021 is integrated: In addition to structural adjustments and editorial changes, the main technical changes are as follows: --- Changed the scope, added that this document also applies to metals and other inorganic coatings, and extended the lower limit of the Knoop hardness test force to 0:009807N (see Chapter 1, Chapter 1 of GB/T 18449:1-2009); --- Added the resolution requirements of the indentation measurement system corresponding to different diagonal length measurement ranges (see Table 2); --- The increased specimen thickness or test layer thickness should be at least 1/3 of the diagonal length of the indentation (see 7:3); --- Added the determination of Knoop hardness of metal and other inorganic coatings (see 7:5); --- Added typical test forces HK0:001, HK0:002 and HK0:005 (see Table 3); --- Increased period verification (see 8:3); --- Changed the target values of force application time and holding time under maximum force (see 8:6, Chapter 7 of GB/T 18449:1-2009); --- Added the minimum distance between adjacent indentations and the minimum distance between any indentation and the edge of the specimen (see Figure 3); --- Added requirements for hardness conversion method (see Chapter 10); --- Added the normative appendix "Determination of Knoop hardness of metals and other inorganic coatings" (see Appendix A); --- Changed Appendix B to a normative appendix, added the period inspection content of the diagonal length measurement system and the pressure head, and added the table B:1HK maximum allowable deviation value and added pressure head inspection (see Appendix B, Appendix A of GB/T 18449:1-2009): This document is modified to adopt ISO 4545-1:2023 "Knoop hardness test for metallic materials - Part 1: Test method": The technical differences between this document and ISO 4545-1:2023 and their reasons are as follows: --- Replaced ISO 4545-2:2017 (see Chapter 6, Appendix B) with the normative reference GB/T 18449:2 to adapt to my country's technical requirements: Technical conditions and increase operability; --- ISO 4545-3 (see Appendix B) has been replaced by the normative reference GB/T 18449:3 to adapt to my country's technical conditions and increase Operability; --- Added normative reference to JJG1047 (see 6:1) to adapt to my country's technical conditions and increase operability: The following editorial changes were made to this document: --- Replaced ISO 14577-1 with the informative reference GB/T 21838:1 (see Chapter 1, 8:9); --- Replaced ISO 14577-2 with the informative reference GB/T 21838:2 (see 8:9); --- Replaced ISO 14577-3 with the informative reference GB/T 21838:3 (see 8:9); --- Replaced ISO 4545-4 with the informative reference GB/T 18449:4 (see 8:10); --- Added the informative reference to JJF1059:1 (see Chapter 9); --- ISO 1463 is replaced by the informative reference GB/T 6462 (see Appendix A); --- Replaced ISO 14577-4 with the informative reference GB/T 21838:4 (see Appendix A); --- Corrected the reference errors of international standards (see Appendix D): Please note that some of the contents of this document may involve patents: The issuing organization of this document does not assume the responsibility for identifying patents: This document was proposed by the China Iron and Steel Association: This document is under the jurisdiction of the National Technical Committee on Steel Standardization (SAC/TC183): This document was drafted by: Central Iron and Steel Research Institute Co:, Ltd:, Suzhou Huachuang Special Materials Co:, Ltd:, Fujian Minliang Calibration Technology Center Co:, Ltd:, Metallurgical Industry Information Standards Research Institute, and China National Institute of Metrology: The main drafters of this document are: Gao Yifei, Wu Xian, Wu Hong, Dong Li, Hou Xiaodong, Liu Zhanbin, Hou Huining and Wu Kunming: The previous versions of the documents replaced by this document are as follows: ---GB/T 18449:1-2001, GB/T 18449:1-2009; ---GB/T 9790-1988, GB/T 9790-2021:IntroductionGB/T 18449 "Knoop hardness test for metallic materials" is intended to standardize the Knoop hardness test method for metallic materials, the inspection and calibration of hardness testers: The calibration and hardness value of standard hardness blocks, etc: GB/T 18449 consists of 4 parts: --- Part 1: Test methods; --- Part 2: Verification and calibration of hardness testers; --- Part 3: Calibration of standard hardness blocks; --- Part 4: Hardness value table: This document provides the test method for Knoop hardness: Knoop hardness test for metal materials Part 1: Test methods1 ScopeThis document specifies the principle, hardness tester, specimen, test procedure, uncertainty of results and test report for the Knoop hardness test of metals: This document specifies the Knoop hardness test with a test force range of 0:009807N~19:613N: This document specifies the Knoop hardness test with an indentation diagonal length of not less than 0:020 mm: Imperfections in the indenter geometry lead to large uncertainties and the use of this method to determine the Knoop hardness from smaller indentations is beyond the scope of this document: The results will be within a certain range because of the great uncertainty: This document also specifies the periodic inspection method for users to perform daily inspections on hardness testers: The Knoop hardness test specified in this document is also applicable to metallic and other inorganic coatings, including electrophoretic coatings on aluminum substrates, self-catalyzed coatings, Chemical coating, spray coating and anodic coating: This document applies to indentation measurements perpendicular to the surface of the coating and to cross-sectional measurements, provided that the characteristics of the coating (smoothness, thickness etc:) allows accurate reading of the diagonal of the indentation: This document is not applicable to coatings with a thickness less than 0:007 mm when tested perpendicular to the surface of the covering layer and to coatings with a cross-section thickness less than 0:007 mm when tested perpendicular to the surface of the covering layer: For coatings with a thickness of less than 0:020 mm, GB/T 21838:1 can be used to determine the hardness of smaller indentations:2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document: For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document: GB/T 18449:2 Knoop hardness test for metallic materials Part 2: Verification and calibration of hardness testers (GB/T 18449:2- 2012,ISO 4545-2:2005,MOD) GB/T 18449:3 Knoop hardness test for metallic materials Part 3: Calibration of standard hardness blocks (GB/T 18449:3- 2012,ISO 4545-3:2005,MOD) JJG1047 Verification Procedure for Metal Knoop Hardness Tester3 Terms and definitionsThere are no terms or definitions that require definition in this document:4 Symbols and instructions4:1 Symbols and instructions used in this document Symbols and descriptions are shown in Table 1: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 18449.1-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 18449.1-2024_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 18449.1-2024?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18449.1-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
