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GB/T 6031-2017 English PDF

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GB/T 6031-2017: Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD)
Status: Valid

GB/T 6031: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 6031-2017English494 Add to Cart 3 days [Need to translate] Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD) Valid GB/T 6031-2017
GB/T 6031-1998English719 Add to Cart 3 days [Need to translate] Rubber, Vulcanized or thermoplastic. Determination of hardness (hardness between 10 IRHD and 100IRHD) Obsolete GB/T 6031-1998
GB/T 6031-1985EnglishRFQ ASK 3 days [Need to translate] Vulcanized rubber--Determination of hardness (hardness between 30 and 85 IRHD)--Normal test Obsolete GB/T 6031-1985

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Basic data

Standard ID GB/T 6031-2017 (GB/T6031-2017)
Description (Translated English) Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD)
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G40
Classification of International Standard 83.060
Word Count Estimation 26,268
Date of Issue 2017-07-12
Date of Implementation 2017-11-01
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

GB/T 6031-2017: Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD)


---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.
Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD) ICS 83.060 G40 National Standards of People's Republic of China Replace GB/T 6031-1998 Vulcanized rubber or thermoplastic rubber Determination of hardness (10IRHD ~ 100IRHD) Rubber, vulcanizedorthermoplastic-Determinationofhardness (ISO 48..2010, IDT) 2017-07-12 released 2017-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III Introduction IV 1 Scope 1 2 normative reference document 2 3 Terms and definitions 2 4 Principle 2 5 instrument 3 5.1 Overview 3 5.2 Methods N, H, L and M 3 5.3 Methods CN, CH, CL and CM 4 6 Sample 5 6.1 Overview 5 6.2 Methods N, H, L and M5 6.3 Methods CN, CH, CL and CM 6 7 Time interval between vulcanization and test 6 8 sample adjustment 6 9 Test temperature 6 10 Procedure 6 Number of measurements 7 12 results indicate 7 13 precision 7 14 Test Report 9 Appendix A (informative) The empirical relationship between penetration depth and hardness Appendix B (informative) Precision Results of the Inter-laboratory Test Program (ITP) 12 Appendix C (Informative Appendix) Precision Results Use Guide 20 Reference 21

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 6031-1998 "Determination of hardness of vulcanized rubber or thermoplastic rubber (10 to 100 IRHD)", and GB/T 6031-1998 compared to the main technical changes are as follows. - increased calibration and verification requirements for the use of the instrument (see Chapter 5); - increased the position of the measuring point on the specimen (see Chapter 11); - standardize the representation of the results and add examples (see Chapter 12); --- Adjust the "precision" in Chapter 13 of GB/T 6031-1998 to Appendix B and update the contents (see Appendix B). This standard uses the translation method equivalent to ISO 48..2010 "vulcanized rubber or thermoplastic rubber hardness determination (10IRHD ~ 100IRHD) ". And the normative reference in this standard international documents are consistent with the relationship between China's documents are as follows. Rubber - Physical test methods - General procedures for the preparation and adjustment of specimens (ISO 23529..2004, IDT) GB/T 2941-2006. This standard is proposed by the China Petroleum and Chemical Industry Association. This standard by the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35) centralized. The drafting unit of this standard. Guangdong Institute of Metrology, Hangzhou Chaoyang Rubber Co., Ltd., Fengshen Tire Co., Ltd., China Stone Group Asset Management Co., Ltd. Baling Petrochemical Company, Yiwei Yi Rubber Research Institute Co., Ltd., 赛 round Jinyu Group Co., Ltd. (Beijing) Co., Ltd., Yangzhou Pearl Test Machinery Factory, Jiangsu Xinxin Wei test Machinery Co., Ltd., Taizhou City Gang Yang Rubber Co., Ltd. The main drafters of this standard. Chen Minghua, Wu Xiangli, Lu Qing, Lu Chunjun, Ren Shaowen, Ma Tiancheng, Duan Qingbing, Zhang Jiazong, Liu Aizin, Zhao Yali, Yang Wenzhen, Cheng Hongfang, Xie Junfang, Li Jing, Tan Zhixue, Zhu Muzhi, Shen Kehui, Kan Zhijian, Sun Zhiqing. This standard replaced the previous version of the standard release. --- GB/T 6031-1985, GB/T 6031-1998; --- GB/T 6032-1985; --- GB/T 9866-1988; --- GB/T 11207-1989.

Introduction

The hardness test provided by this standard provides a means for rapidly measuring the hardness of the rubber by measuring the compressive properties of the rubber, and other materials The hardness test for the determination of permanent deformation resistance is different. The hardness is measured at a predetermined pressure by the press-in depth of the ball-shaped pin pressed into the rubber sample. The hardness values can be obtained from the empirical relationship between the pressing depth and the Young's modulus of the fully elastic isotropic material. This applies to Most of the rubber. When it is necessary to determine the Young's modulus of the material, appropriate test methods, such as those specified in ISO 7743, should be used. The hardness test guidelines given in ISO 18517 are also useful references. Vulcanized rubber or thermoplastic rubber Determination of hardness (10IRHD ~ 100IRHD) Caution. Personnel using this standard should have practical experience in formal laboratory work. This standard does not address all possible security issues, It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations. Note. Some of the operations involved in this standard may be used to generate some substances or produce waste and have an adverse effect on the local environment. Develop appropriate documents for the disposal of these substances after use.

1 Scope

This standard specifies four methods for the determination of the hardness of vulcanized rubber or thermoplastic rubber (standard hardness method) and four pairs Standard Test Method for Apparent Hardness of Bending Surface Specimens (Apparent Hardness Method). The hardness values are expressed in terms of rubber international hardness (IRHD). These measurements The applicable hardness range is from 10IRHD to 100IRHD. The main difference between these methods is the size of the spherical indenter and the magnitude of the force, and the appropriate method should be selected according to the particular application. Each one The scope of application of the method shown in Figure 1. This standard does not specify a method for determining hardness using a portable durometer, which is described in ISO 7619-2. Description. X - hardness (IRHD); a - Method L and Method CL; b - Method N, M and Method CN, CM; c - Method H and Method CH. Figure 1 The scope of application of various methods This standard specifies the following four methods for determining the standard hardness. Method N (conventional test). suitable for rubber hardness in the 35IRHD ~ 85IRHD range, can also be used for hardness in the 30IRHD ~ 95IRHD within the range of rubber. Method H (high hardness test). suitable for rubber hardness in the 85IRHD ~ 100IRHD range. Method L (low hardness test). suitable for rubber hardness in the range of 10IRHD ~ 35IRHD. Method M (micro test). Essentially scaled down method N (conventional test), can be used for thin and small samples. Apply to rubber hard Degrees in the 35IRHD ~ 85IRHD range, can also be used for hardness in the range of 30IRHD ~ 95IRHD rubber. Note 1. In the range of 85 IRHD to 95 IRHD and 30 IRHD to 35 IRHD, the hardness values measured by method N are calculated using the method H or method L The data are not exactly the same, for technical purposes the difference is usually not obvious. Note 2. Due to the various surface factors of the rubber, such as rough surface caused by grinding, can lead to micro-test and conventional test results are not exactly the same. This standard also provides four methods for determining the apparent hardness of curved surfaces, CN, CH, CL and CM. These methods are used for testing The modification of the rubber surface is a modification of the methods N, H, L and M, in which case there are two main possibilities.

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