GB/T 33362-2016 English PDF

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GB/T 33362-2016: Metallic materials -- Conversion of hardness values
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Basic data

Standard ID: GB/T 33362-2016 (GB/T33362-2016)
Description (Translated English): Metallic materials -- Conversion of hardness values
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H22
Word Count Estimation: 107,192
Date of Issue: 2016-12-30
Date of Implementation: 2017-09-01
Adopted Standard: ISO 18265-2013, IDT
Regulation (derived from): National Standard Notice No.27 of 2016
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the conversion principle between the hardness values ??and the hardness values ??and the estimated values ??of the tensile strength, and gives the general rules for the use of the conversion tables. The conversion tables in Appendix A to Appendix G of this standard apply to: - non-alloy steel, low alloy steel and cast steel; - quenched and tempered steel; - cold working steel; - high speed steel; - hard alloy; - ferrous metals and alloys; Tool steel. The conversion values ??obtained using this standard can only be applied to specific materials to be tested and are for reference only to other materials. In any case, the conversion value can not be substituted for the hardness value measured by the correct test method, and the reliability of the tensile strength is estimated to be the lowest by the conversion of this standard as compared with the conversion between the hardness values.

GB/T 33362-2016: Metallic materials -- Conversion of hardness values

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Metallic materials - Conversion of hardness values ICS 77.040 H22 National Standards of People's Republic of China Conversion of hardness values of metallic materials (ISO 18265..2013, IDT) 2016-12-30 release 2017-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface I Introduction II 1 Scope 1 2 conversion principle 1 3 conversion table application 3 3.1 Overview 3 3.2 conversion value 6 3.3 The result of the conversion mark 7 3.4 Application Note for Conversion Table 8 Appendix A (Informative Appendix) Hardness Conversion of Non Alloy Steel, Low Alloy Steel and Cast Steel Table 10 Appendix B (informative) Refinement of quenched and tempered steel Table 15 Appendix C (informative) Cold working steel conversion table Appendix D (informative) High speed steel conversion table Appendix E (informative) Carbide Conversion Table 75 Appendix F (Informative Annex) Conversion Table for Nonferrous Metals and Alloys Appendix G (informative) Tool steel conversion table 94 Appendix H (informative) Description of changes in test conditions Reference 102

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the translation method equivalent to ISO 18265..2013 "metal material hardness value conversion" (English version). For ease of use, this standard has been modified as follows. --- Correct the editorial error, fix the uncertainty symbol "u" to "U", and correct the repeatability symbol "R" to "r". This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). The drafting of this standard. Metallurgical Industry Information Standards Institute, Shenyang Star Star Experimental Instrument Co., Ltd., Wuhan Iron and Steel Research Institute. The main drafters of this standard. Dong Li, Zhang Fenglin, Hou Jie, Li Rongfeng, Zhang Weixu.

Introduction

The hardness conversion values given in Table A.1 are those used by the German Association of Metallurgical Engineers in a number of different laboratories that have been tested and calibrated The degree of comparison test. Since these test conditions can not be reproduced, the number of test results used to calculate the average hardness value has also been It is not possible to give a statistically significant and reliable data of these conversion values. Table A.1 is associated with the European Coal and Steel 3 (1980) and 4 (1982) and ISO 4964. 1984 and ISO /T R10180. 1989. Former Democrats The German Standardization, Metrology and Commodity Inspection Service (ASMW) presented in its published standard TGL43212/2 ~ 43212/4 A number of hardness conversion results, the standard Appendix C, Appendix D and Appendix E is based on this standard to be revised. Appendix E of this standard In the hardness of the conversion data is determined by the ASMW, in the Institute of Physical Technology Research published in the report, these data are not used as TGL standard. The hardness conversion values in the above TGL standards are based on statistically reliable hardness tests and tensile tests. Hardness test is in The former ASMW standard machine on the different heat treatment of the polished parallel plane samples were carried out. Tensile testing machine for testing - The extensometer measurement system was calibrated prior to testing and the tensile test method was carried out in accordance with ISO 6892-1. ISO 7500-1 and ISO 9513. Appendix G contains two tool steel hardness conversion value is in the German Association of Metallurgical Engineers (VDEh) with the help of.2007 Get it. When using this standard, note the warning contained in Chapter 2. Conversion of hardness values of metallic materials

1 Scope

This standard specifies the conversion between hardness values and hardness and tensile strength estimates, and gives the use of conversion tables General rule. The conversion tables in Appendix A to Appendix G of this standard apply to. --- non-alloy steel, low alloy steel and cast steel; --- quenched and tempered steel; Cold working steel High speed steel Carbide; --- Nonferrous metals and alloys; --- tool steel. Note 1. The conversion tables in Appendix B to Appendix G are based on the results of the regression analysis. Appendix A of the conversion table because there is no enough measurement results and can not Do a similar analysis. Note 2. The information given in Appendix H is the effect of changing the test hardness program specified by the standard. The conversion values obtained using this standard can only be applied to specific materials under test and are for reference only to other materials. In any case The value can not be replaced by the correct test method to determine the hardness value, compared with the conversion between the hardness value, through the conversion of the standard value to estimate The reliability of the tensile strength is the lowest.

2 conversion principle

The hardness test is a test method that determines the mechanical properties of the material in a relatively short period of time with only minor damage to the specimen. In reality In practice, when the tensile test is too time-consuming or the test piece is not allowed to be destroyed, it is generally desirable to use the material hardness test results estimate Out of its tensile strength. Due to the influence of material stress, there is a difference between the hardness test and the tensile test, so it is difficult to construct a model between two parameters. Reliable function relationship. However, the hardness values are positively correlated with the tensile strength values, and therefore, within a limited range of applications, The empirical parameters are possible. It is often necessary to compare a given hardness value with the value measured by another different test method, especially when the test is subject to special Special specimen, coating thickness, sample size, sample surface quality, or available hardness tester type only allowed to use a certain hardness test method Of the case, this conversion method can be used. The conversion between the hardness value and the tensile strength value makes it possible to replace the tensile strength test with a hardness test, but it must be noted that this Conversion is the most unreliable. Likewise, the values obtained with the desired test can be replaced by the difference between the different hardness scales. Value. Sometimes a conversion relationship is based on an individual case, in order to obtain the material hardness other than the characteristics of this feature is usually a When the tensile strength is estimated. In the case of drawing a specific conversion relationship between hardness and hardness, the following conditions should be satisfied. - the hardness test method used only internally, and the results obtained can not be compared with the results of other methods, or the test process The details are rigorous enough to reproduce the test results in another laboratory or at other times; --- The conversion tables used have been extensively tested on the test material and used different scales; ......

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