GB/T 28906-2025 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 28906-2025: Hot-rolled steel wire rod for cold heading Status: Valid GB/T 28906: Historical versions
Basic dataStandard ID: GB/T 28906-2025 (GB/T28906-2025)Description (Translated English): Hot-rolled steel wire rod for cold heading Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H44 Classification of International Standard: 77.140.60 Word Count Estimation: 26,254 Date of Issue: 2025-03-28 Date of Implementation: 10/1/2025 Older Standard (superseded by this standard): GB/T 28906-2012,GB/T 29087-2012 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 28906-2025: Hot-rolled steel wire rod for cold heading---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.National Standard of the People's Republic of China ICS 77.140.60CCS H 44 Cold Heading Steel Hot Rolled Wire Rod Hot⁃rolled steel wire rod for cold heading 2025-03-28 Release 2025-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Replaces GB/T 28906-2012, GB/T 29087-2012 ForewordThis 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 is required. This document replaces GB/T 28906-2012 "Hot-rolled cold-forging steel wire rod" and GB/T 29087-2012 "Non-quenched and tempered hot-rolled cold-forging steel wire rod" In addition to structural and editorial changes, the main technical changes are as follows. --The sulfur and phosphorus contents have been changed (see Chapter 7, Chapter 6 of GB/T 28906-2012); --Changed the grades of quenched and tempered cold heading steel hot rolled wire rods, adjusted according to GB/T 6478-2015, and added ML38, ML50, ML40Mn2, ML45Mn2, ML30CrMnSi, ML15CrMo, ML42CrMo, ML20CrMoV, ML35CrMoV, Ten grades of ML42CrMoV (see 7.1.3, 6.1.4 of GB/T 28906-2012); --Added boron-containing quenched and tempered grades, including ML23B, ML28B, ML33B, ML38B, ML45B, ML20CrB, ML25CrB, ML35VB eight grades (see 7.1.3); --The scope and composition of non-adjustable steel have been changed (see 7.1.4, 6.1.1 of GB/T 29087-2012); --Added the residual molybdenum content requirement (see 7.1.5); --Changed the mechanical property requirements (see 7.2.2.2, 7.2.3.1, 6.4.2 of GB/T 28906-2012, GB/T 29087-2012 of 6.5); --Added low temperature impact performance requirements (see 7.2.3.2); --Changed the requirements for macrostructure (see 7.7, 6.8 of GB/T 28906-2012); --Added recommended quenching temperature and Rockwell hardness values at different distances from the quenching end (see 7.8); --Changed the surface quality requirements (see 7.9, 6.9 of GB/T 28906-2012); --Added size requirements (see 7.10.2); --The coil weight of wire rod has been changed (see 7.10.3, 5.2 of GB/T 28906-2012); --Added requirements for iron oxide scale (see 7.11); --The test method has been changed (see 8.1, 8.2, Chapter 7 of GB/T 28906-2012). 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/TC 183). This document was drafted by. Jiangsu Yonggang Group Co., Ltd., Jiangsu Shagang Steel Co., Ltd., Qingdao Special Steel Co., Ltd., Fujian Sangang Minguang Co., Ltd., Maanshan Iron and Steel Co., Ltd., Henan Jiyuan Iron and Steel (Group) Co., Ltd., Hunan Valin Xiangtan Iron and Steel Co., Ltd., Tianjin Rongcheng United Steel Group Co., Ltd., Jiangsu Binxin Steel Group Co., Ltd., Benxi Beiying Steel (Group) Co., Ltd. Co., Ltd., Guangdong Zhongnan Iron and Steel Co., Ltd., Ningbo Ningli High Strength Fastener Co., Ltd., Ningbo Jiulong Chuangzhan Fastener Co., Ltd. Co., Ltd., Fubai New Materials (Zhejiang) Co., Ltd., and Metallurgical Industry Information Standards Research Institute. The main drafters of this document are. Hu Junhui, Yu Tongren, Leng Mingjian, Ren Cuiying, Wang Kaizhong, Sui Zhisong, Nie Wenjin, Li Xiangchun, Zhou Wenbo, Dong Wenli, Jia Jin, Pi Pengfei, Lin Tao, Tian Weiyang, Huang Zhuming, Xu Yong, Dai Peihong, Pan Yijie, Qu Xiaobo, Wang Zhenchuan, Liu Zhengpeng, Fang Yurong, Jiang Ting, Jia Chuan, Yu Gang, Xu Mingjie, Zhang Baomin, Zhang Dong, Lei Zhongyu, Chen Yansong, Li Xiaoya, Su Diyao, Liu Hongjun, Zhang Xiaorui, and Wang Lingjun. The previous versions of the documents replaced by this document are as follows. --GB/T 28906-2012, GB/T 29087-2012. Cold Heading Steel Hot Rolled Wire Rod1 ScopeThis document specifies the classification and grade representation method, ordering content, manufacturing process, technical requirements, test methods, Inspection rules, packaging, marking and quality certificates. This document applies to cold heading for manufacturing fasteners such as bolts, screws and studs with a nominal diameter of 5 mm to 52 mm and cold heading steel wire. Hot rolled steel wire rod (hereinafter referred to as "wire rod"), if it exceeds the scope of this specification, can refer to this document for implementation.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 222 Permissible deviation of chemical composition of finished steel products GB/T 223.5 Determination of acid-soluble silicon and total silicon content of iron and steel - Reduced molybdenum silico-silicic acid spectrophotometric method GB/T 223.9 Determination of aluminum content in steel and alloys - Chrome azurol S spectrophotometric method GB/T 223.11 Determination of chromium content in steel and alloys Visual titration or potentiometric titration method GB/T 223.12 Methods for chemical analysis of iron, steel and alloys - Sodium carbonate separation - Diphenylcarbazide photometric method for determination of chromium content GB/T 223.14 Chemical analysis methods for iron, steel and alloys - Tantalum extraction spectrophotometric method for determination of vanadium content GB/T 223.26 Determination of molybdenum content in steel and alloys - Thiocyanate spectrophotometric method GB/T 223.37 Determination of nitrogen content in iron, steel and alloys - Spectrophotometric method using indophenol blue distillation separation GB/T 223.40 Determination of niobium content in iron, steel and alloys - Chlorosulfonphenol S spectrophotometric method GB/T 223.53 Chemical analysis methods for iron, steel and alloys - Determination of copper content by flame atomic absorption spectrophotometry GB/T 223.54 Determination of nickel content in steel and alloys - Flame atomic absorption spectrometry GB/T 223.59 Determination of phosphorus content in iron, steel and alloys - Bismuth phosphomolybdenum blue spectrophotometric method and antimony phosphomolybdenum blue spectrophotometric method GB/T 223.60 Determination of silicon content in steel and alloys by gravimetric method GB/T 223.63 Determination of manganese content in steel and alloys - Sodium (potassium) periodate spectrophotometric method GB/T 223.78 Chemical analysis methods for iron, steel and alloys - Curcumin direct photometric method for determination of boron content GB/T 223.79 Determination of multi-element content of steel - X-ray fluorescence spectrometry (conventional method) GB/T 223.81 Determination of total aluminum and total boron content of steel and alloys - Microwave digestion - Inductively coupled plasma mass spectrometry GB/T 223.84 Determination of titanium content in steel and alloys - Diantipyryl methane spectrophotometric method GB/T 223.85 Determination of sulfur content in iron, steel and alloys - Infrared absorption method after combustion in an induction furnace GB/T 223.86 Determination of total carbon content of steel and alloys - Infrared absorption method after combustion in an induction furnace GB/T 224 Determination of the depth of decarburization layer of steel GB/T 225 End quenching test method for hardenability of steel (Jominy test) GB/T 226 Acid etching test method for macrostructure and defects of steel GB/T 228.1 Tensile test of metallic materials Part 1.Room temperature test method GB/T 229 Charpy pendulum impact test method for metallic materials GB/T 230.1 Rockwell hardness test for metallic materials Part 1.Test method ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28906-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 28906-2025_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 28906-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 28906-2025 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. |
