GB/T 223.6-2025 English PDFUS$519.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 223.6-2025: Iron, steel and alloy - Determination of boron content - Neutralization titrimetric method and spectrophotometric method Status: Valid GB/T 223.6: Historical versions
Basic dataStandard ID: GB/T 223.6-2025 (GB/T223.6-2025)Description (Translated English): Iron, steel and alloy - Determination of boron content - Neutralization titrimetric method and spectrophotometric method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H11 Classification of International Standard: 77.080.01 Word Count Estimation: 26,258 Date of Issue: 2025-08-29 Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 223.6-1994, GB/T 223.75-2008, GB/T 223.78-2000 Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China GB/T 223.6-2025: Iron, steel and alloy - Determination of boron content - Neutralization titrimetric method and spectrophotometric method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT223.6-2025 ICS 77.080.01 CCSH11 National Standards of the People's Republic of China Replaces GB/T 223.6-1994, GB/T 223.75-2008 and GB/T 223.78-2000 Determination of Boron Content in Iron and Steel Alloys Neutralization titration and spectrophotometry Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement. ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document is Part 6 of GB/T 223.The previously published parts of GB/T 223 are listed in Appendix A. Method 1 in this document replaces GB/T 223.6-1994 "Chemical Analysis Methods for Iron and Steel and Alloys. Determination of Boron by Neutralization Titration"; this document Method 2 replaces GB/T 223.75-2008 "Determination of Boron Content in Iron and Steel and Alloys - Methanol Distillation-Curcumin Photometric Method"; this document's method The third standard replaces GB/T 223.78-2000 "Chemical Analysis Methods for Iron and Steel and Alloys. Determination of Boron Content by Direct Spectrophotometry of Curcumin". Compared with GB/T 223.6-1994, GB/T 223.75-2008 and GB/T 223.78-2000, except for structural adjustments and editorial changes... Aside from the changes, the main technical changes are as follows. ---Added terms and definitions (see Chapter 3); ---Added a "Reagent" introductory phrase for Method 1 (see 4.2); ---Added a description of sample preparation for Method 1 (see 4.3); ---The precision description of Method 1 has been modified (see 4.6, Chapter 6 of GB/T 223.6-1994); ---Added requirements for instruments and equipment for Method 2 (see 5.3.2). This document is modified to adopt ISO 10153.1997, "Determination of boron content in steel—Curcumin—Spectrophotometric method". This document is consistent with ISO 10153. See Appendix B for the structure numbering comparison table for.1997. The technical differences between this document and ISO 10153.1997, and the reasons therefor, are as follows. ---Method 1 has been added (see Chapter 4) to facilitate standard use; ---Method 2 has been added (see Chapter 5) to facilitate standard use. The following editorial changes have been made to this document. ---The standard name has been changed to "Determination of Boron Content in Iron and Steel and Alloys by Neutralization Titration and Spectrophotometry". Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Steel Research Institute NACK Testing Technology Co., Ltd., China Iron & Steel Research Institute Co., Ltd., and Benxi Steel Plate Co., Ltd. The companies include Maanshan Iron & Steel Co., Ltd., Institute of Metal Research, Chinese Academy of Sciences, and Chongqing Iron & Steel Co., Ltd. The main drafters of this document are. Zhang Cuimin, Luo Qianhua, Hu Xiuwei, Wang Yapeng, Song Zufeng, Fan Xiaofen, Miao Wenhui, Zhang Xu, Li Hui, and Jin Boying. Wang Han and Li Guangjie. The release history of this document and the document it replaces is as follows. ---First published in 1981 as GB 223.6-1981, it consists of three parts. acid-base neutralization volumetric method, methanol distillation-curcumin spectrophotometry Three methods. direct spectrophotometry of curcumin, etc. ---Part 1 of GB 223.6-1981 was revised to GB/T 223.6-1994 in.1994; Part II of GB 223.6-1981 was first revised in.1991 as GB/T 223.75-1991; the second revision was in.2008. The revised standard is GB/T 223.75-2008; Part III of GB 223.6-1981 was revised in.2000 to GB/T 223.78-2000.introductionSteel is the backbone of the national economy, the lifeblood of the nation, and the material guarantee for its survival and development. The steel industry's standards system... In China, the standard system for determining the chemical composition of steel and alloys is a very important part, playing a crucial role in ensuring the quality of steel and alloy products. This series of method standards plays a vital role in the production, trade, and application of steel and alloys, providing technical support for the high-quality development of my country's steel industry. Technical support. GB/T 223 includes methods for the determination of chemical composition of iron and steel and alloys, specifying the values of carbon, silicon, manganese, phosphorus, sulfur, etc. in iron and steel and alloy products. Nickel, chromium, molybdenum, copper, vanadium, aluminum, titanium, cobalt, tungsten, niobium, zirconium, tantalum, calcium, magnesium, zinc, iron, arsenic, lead, tin, antimony, bismuth, cadmium, selenium, tellurium, cerium, boron, oxygen, nitrogen, hydrogen, Methods for determining total rare earth content and hydrochloric acid insoluble matter, and other chemical components. In 1963, GB/T 223 first published 12 national standards for the determination of chemical composition of iron and steel, which have been continuously improved in the field of steel and alloy analysis. Based on technological development and actual production needs, and through years of continuous revision and development, a relatively complete standard system has been formed. The constituent parts of GB/T 223 are shown in Appendix A. Determination of Boron Content in Iron and Steel Alloys Neutralization titration and spectrophotometry Warning---Personnel using this document should have practical experience working in a formal laboratory. This document does not address all possible safety issues. Users are responsible for taking appropriate safety and health measures and ensuring compliance with relevant national regulations. 1.Scope This document describes a method for determining the boron content in iron and steel and alloys using neutralization titration and curcumin spectrophotometry. The applicable scope of each method in this document is as follows. Method 1, neutralization titration, is suitable for the determination of boron content of 0.50% to 2.00% in high-boron stainless steel; Method 2, the methanol distillation-curcumin spectrophotometric method, is suitable for methanol with a mass fraction of 0.0005% in carbon steel, alloy steel, high-temperature alloys, and precision alloys. Determination of 0.20% boron content; Method 3, direct spectrophotometric method for curcumin, is applicable to steel with boron content of 0.0005%~0.012% and non-alloy steel. Determination of boron content from 0.0001% to 0.0005%.2 Normative referencesThe contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 6379.1 Accuracy (correctness and precision) of measurement methods and results - Part 1.General principles and definitions (GB/T 6379.1-2004,ISO 5725-1.1994,IDT) GB/T 6379.2 Accuracy (correctness and precision) of measurement methods and results - Part 2.Determining the repeatability of standard measurement methods Basic methods for sex and reproducibility (GB/T 6379.2-2004, ISO 5725-2.1994, IDT) GB/T 6682 Specifications and test methods for water used in analytical laboratories (GB/T 6682-2008, ISO 3696.1987, MOD) GB/T 7729 General Rules for Chemical Analysis of Metallurgical Products - Spectrophotometric Method GB/T 20066 Sampling and sample preparation methods for the determination of chemical composition of steel and iron (GB/T 20066-2006, ISO 14284. 1996, IDT) Part 1.General Requirements testmethods) ISO 5725-1 Accuracy (correctness and precision) of measurement methods and results - Part 1.General principles and definitions tions] ISO 5725-2 Accuracy (correctness and precision) of measurement methods and results - Part 2.Determining the repeatability of standard measurement methods mentmethod] ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 223.6-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 223.6-2025_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 223.6-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 223.6-2025 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. |
