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GB/T 11354-2025 English PDF

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US$439.00 · In stock
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GB/T 11354-2025: Determination of nitriding hardness depth and metallographic examination for steel
Status: Valid

GB/T 11354: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 11354-2025	439	Add to Cart	4 days	Determination of nitriding hardness depth and metallographic examination for steel	Valid
GB/T 11354-2005	165	Add to Cart	Auto, < 3 mins	Determination of nitrided case depth and metallographic microstructure examination for steel and iron parts	Valid
GB/T 11354-1989	599	Add to Cart	4 days	Steel-iron parts--Determination of nitrided case depth and metallographic examination of nitriding structure	Obsolete

Basic data

Standard ID: GB/T 11354-2025 (GB/T11354-2025)
Description (Translated English): Determination of nitriding hardness depth and metallographic examination for steel
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J36
Classification of International Standard: 25.200
Word Count Estimation: 22,290
Date of Issue: 2025-08-29
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 11354-2005
Issuing agency(ies): State Administration for Market Regulation, National Standardization Administration

GB/T 11354-2025: Determination of nitriding hardness depth and metallographic examination for steel

---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/GBT11354-2025
ICS 25.200 CCSJ36 National Standard of the People's Republic of China Replaces GB/T 11354-2005 Determination of nitriding layer depth and metallographic structure inspection of steel parts Released on August 29, 2025 Implementation on March 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and abbreviations 2 5 Determination of nitriding layer depth 2 6 Metallographic inspection of nitrided layer 5 7 Test Report 13 Appendix A (Normative) Determination of Nitriding Hardened Layer Depth by Interpolation Method 14 Reference 15 Preface This 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 replaces GB/T 11354-2005 "Determination of nitriding layer depth and metallographic examination of steel parts" and GB/T 11354- Compared with.2005, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2005 edition); b) Added the terms and definitions of “nitriding hardened layer depth” and “compound layer thickness” (see 3.1 and 3.2); c) Added symbols and abbreviations (see Chapter 4); d) Added the determination principle of hardened layer depth and the provisions of test equipment (see 5.1.1 and 5.1.2); e) The provisions on specimens, test methods and results have been modified (see 5.1.3, 5.1.4, 5.1.5, Chapter 5 and 6.1 of the.2005 edition); f) Deleted the provisions on measurement steps and results, metallographic method and arbitration (see 6.2, 6.3 and 6.4 of the.2005 edition); g) Added the method for determining the thickness of the compound layer (see 5.2); h) The original description of tissue levels was changed, and "fine needle-shaped trochophores" were deleted [see Figures 6a) to 6e, Table 1 of the.2005 edition]; i) Deleted the important parts in the metallographic inspection regarding the original structure, nitriding layer brittleness, nitriding layer looseness, and nitride grade assessment (See 4.2, 7.4, 8.2, and 9.2 of the.2005 edition); j) The requirement to repeat the measurement of nitrided layer brittleness once has been deleted (see 7.3 of the.2005 edition); k) The content of the test report has been changed (see Chapter 7, Chapter 10 of the.2005 edition); l) Added the interpolation method for determining the depth of nitriding hardened layer (see Appendix A). 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 is proposed and coordinated by the National Technical Committee for Standardization of Heat Treatment (SAC/TC75). This document was drafted by. Beijing Electromechanical Research Institute Co., Ltd. of China Machinery Engineering Academy Group, Zhejiang Shuanghuan Transmission Machinery Co., Ltd., China University of Petroleum (East China), Zhejiang National Inspection Technology Co., Ltd., Dalian Huarui Heavy Industries Group Co., Ltd., Chongqing Gearbox Co., Ltd., Jiangsu Fengdong Heat Treatment and Surface Modification Engineering Technology Research Co., Ltd., Beijing Petroleum Machinery Co., Ltd., Jiangsu Golden Industrial Furnace Co., Ltd., Qingdao Fengdong Thermal Technology Co., Ltd., Zhejiang Juyue Gear Co., Ltd., Tianrun Industrial Technology Co., Ltd. Co., Ltd., Gosbell Thermal Systems Jiangsu Co., Ltd., Zhejiang Qiujing Technology Co., Ltd., Suzhou Thermal Engineering Research Institute Co., Ltd., Hangzhou Qianjin Gearbox Group Co., Ltd., Chengdu Saifeisi Metal Technology Co., Ltd., Hunan Southern Aerospace High Precision Transmission Co., Ltd., Shanghai Zhongyan Instrument Manufacturing Co., Ltd. Manufacturing Co., Ltd., Shandong Bote Bearing Co., Ltd., Chongqing Jingyan Xinjukui Technology Co., Ltd., Kunshan Sanmin Tulai Surface Treatment Technology Co., Ltd. Company, Nanjing Technology Equipment Manufacturing Co., Ltd., Rugao Hongmao Heavy Forging Co., Ltd., Jiangsu Shendun Engineering Machinery Co., Ltd., Yeshan Heavy Industry Equipment Co., Ltd., Changzhou New District Hehai Heat Treatment Engineering Co., Ltd., CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co., Ltd. Limited Company. The main drafters of this document are. Xu Yueming, Li Qiao, Zhou Zhiqiang, Li Meiyan, Wang Hui, Cao Fengjiao, Zhao Yun, Shi Yousen, Wang Ruixiao, Chen Weidong, Li Dan, Shi Tianzhen, Sun Jun, Zou Zhaohui, Wang Changfei, Lai Yunting, Zhou Huanhui, Zhou Weining, Qi Ling, Wei Hebao, Zhang Shuyu, Chen Andong, Wang Jiancai, Ding Xiang, Zhou Qingchun, Zhang Honglin, Peng Yuanfei, Yin Heping, Li Pingping, Zhang Tian, Cao Ning, Zhang Ling, Ma Mingliang, and Qin Lixue. This document was first issued in 1988, revised for the first time in.2005, and this is the second revision. Determination of nitriding layer depth and metallographic structure inspection of steel parts

1 Scope

This document specifies the method for determining the depth of nitriding and nitrocarburizing layers on steel parts and the method for examining the metallographic structure before and after nitriding. This document is applicable to the measurement of nitriding hardening layer depth and compound layer thickness after gas nitriding, ion nitriding and nitrocarburizing of steel parts. Determination, as well as inspection and evaluation of brittleness, porosity, vein nitrides and microstructure before nitriding.

2 Normative references

The 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 4340.1 Metallic materials Vickers hardness test Part 1.Test method GB/T 4340.2 Metallic materials Vickers hardness test Part 2.Verification and calibration of hardness testers GB/T 7232 Terminology for Metal Heat Treatment GB/T 18449.1 Knoop hardness test for metallic materials Part 1.Test method GB/T 18449.2 Knoop hardness test for metallic materials - Part 2.Verification and calibration of hardness testers GB/T 34895 General rules for metallographic examination of heat treatment

3 Terms and Definitions

The terms and definitions defined in GB/T 7232 and the following apply to this document. 3.1 The vertical distance from the surface of the nitrided layer to the point where the hardness is 50HV higher than the core. Note. The core hardness is the arithmetic mean of 5 or more measured values at 3 times the depth of the hardened layer, rounded off to an integer multiple of 10HV. 3.2 The thickness of the surface compound layer formed by the infiltrating elements and the metal elements in the matrix during chemical heat treatment. 3.3 Microstructure of steel before nitriding treatment. 3.4 The degree of chipping of the corners of the Vickers hardness indentation on the surface of the nitrided part under a certain test force. 3.5 The density of micropores in the compound layer on the surface of nitrided parts. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 11354-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 11354-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 11354-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 11354-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 11354-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 11354-2025 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.