GB/T 14977-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14977-2025	359	Add to Cart	4 days	General requirement for surface condition of hot-rolled steel sheet and plate	Valid
GB/T 14977-2008	125	Add to Cart	Auto, < 3 mins	General requirement for surface condition of hot-rolled steel plates	Valid
GB/T 14977-1994	319	Add to Cart	3 days	General requirement of surface finish for hot rolled steel plates	Obsolete

Basic data

Standard ID: GB/T 14977-2025 (GB/T14977-2025)
Description (Translated English): General requirement for surface condition of hot-rolled steel sheet and plate
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H46
Classification of International Standard: 77.140.50
Word Count Estimation: 18,121
Date of Issue: 2025-08-29
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 14977-2008
Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China

GB/T 14977-2025: General requirement for surface condition of hot-rolled steel sheet and plate

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ICS 77.140.50 CCSH46 National Standards of the People's Republic of China Replaces GB/T 14977-2008 General requirements for surface quality of hot-rolled steel plates (ISO 7788.2021,Steel-Surfacefinishofhot-roledplatesand Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This 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 replaces GB/T 14977-2008 "General Requirements for Surface Quality of Hot-Rolled Steel Plates". Compared with GB/T 14977-2008, except for... Aside from structural adjustments and editorial changes, the main technical changes are as follows. ---Added descriptions of typical deficiencies (see 5.3.1.1.1); ---The provisions regarding defects have been amended (see 5.3.1.2.2,.2008 version 5.3.1.2.2); ---General requirements for welding repairs have been added (see 5.4.2.1.1); ---The requirement for the depth of the groove for welding repairs on the edge of the steel plate has been changed (see 5.4.2.1.3, 5.4.2.1.2 in the.2008 version); ---Welding process requirements have been added, and the thickness requirements for the post-treatment grinding area have been changed (see 5.4.2.1.4); ---The requirements for weld area in Class 1 of the weld repair classification have been changed (see 5.4.2.2.1,.2008 version 5.4.2.2.1). This document is modified to adopt ISO 7788.2021 "Delivery requirements for surface quality of hot-rolled steel plates and wide flat bars". This document has undergone significant structural adjustments compared to ISO 7788.2021.A table comparing the structural numbering changes between the two documents is provided. See Appendix A. This document differs significantly from ISO 7788.2021.The relevant clauses are indicated in vertical single-line margins. The lines (|) are marked. A summary of these technical differences and their reasons can be found in Appendix B. The following editorial changes have been made to this document. ---The standard name has been changed to "General Requirements for Surface Quality of Hot-Rolled Steel Plates". 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. Shougang Group Co., Ltd., Baoshan Iron & Steel Co., Ltd., Jiangyin Xingcheng Special Steel Co., Ltd., and Benxi Steel Plate Co., Ltd. Materials Co., Ltd., Jinan Iron & Steel Group Co., Ltd., Hunan Valin Lianyuan Iron & Steel Co., Ltd., Metallurgical Industry Information and Standardization Research Institute, Shanghai ZPMC (Group) Co., Ltd., Anyang Iron & Steel Group Co., Ltd., Nanyang Hanye Special Steel Co., Ltd., Beijing University of Science and Technology, Japan Zhaogang Steel Holding Group Co., Ltd., and Jingye (Yingkou) Medium Plate Co., Ltd. The main drafters of this document are. Dai Xiaoli, Shi Li, Huang Jinhua, Sun Xianjin, Zhou Zhongqi, Wang Shuhua, Liu Zhao, Tian Zijian, Ma Honggang, and Deng Hangzhou. Xu Shaopu, Zhao Zhengzhi, Xie Jibiao, Wang Xiaosen, Yu Yang, Niu Tao, Shi Yunfeng, Meng Yu, Huang Jianguo, Li Yanzhi, Wang Hongbing, Sun Menghan, Sun Yanping Chen Yinze, Kang Wenju, Wei Daibin, Yu Hao, Wang Chang, Li Qian, Zhang Weixu, Zheng Xutao. This document was first published in.1994, revised for the first time in.2008, and this is the second revision. General requirements for surface quality of hot-rolled steel plates 1.Scope This document specifies the classification, requirements, and numerical rounding of surface quality for hot-rolled steel plates. This document applies to single-sheet hot-rolled steel sheets with thicknesses ranging from 3mm to 400mm and sheared steel sheets cut from hot-rolled coils. Hereinafter referred to as "steel plate".

2 Normative references

The 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 8170 Rules for rounding off numerical values and the representation and determination of limiting values GB/T 19866 General principles for the qualification and specification of welding procedures (GB/T 19866-2005, ISO 15607.2003, IDT) 3.Terms and Definitions The following terms and definitions apply to this document. 3.1 imperfections In addition to cracks, scabs, and tensile fractures, surface discontinuities whose depth and/or area do not exceed specified limit values are considered to be non-discontinuous. Note. Discontinuities on the surface requiring repair are considered defects. 3.2 Defects All cracks, scabs, and tears (regardless of depth and/or area) and surface discontinuities with depth and/or area exceeding specified limits. Note. Common surface discontinuities are described in Appendix C. 4.Classification Surface quality is divided into two categories, A and B, and each category is further divided into three levels. 1, 2, and 3. Category A. Surface quality shall meet the requirements of 5.3.1 and 5.4.1.2.The remaining thickness of surface discontinuities and ground areas may be less than the allowable thickness of the steel plate. The minimum thickness. Category B. Surface quality shall meet the requirements of 5.3.2 and 5.4.1.3, and the remaining thickness of surface discontinuities and ground areas shall not be less than the allowable thickness of the steel plate. The minimum thickness of Xu. Level 1.Welding repair is permitted after scraping and/or grinding, and must meet the requirements of 5.4.2.2.1. Level 2.Welding repairs are permitted only if agreed upon by both parties and specified in the contract, and must comply with the requirements of 5.4.2.2.2. Level 3.Welding repairs are not permitted. Note. The classification and requirements of surface quality are shown in Table D.1 of Appendix D. When the surface quality category and level are not clearly specified in the product standard or contract, delivery shall be made according to Class A, Level 1. ......

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