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优质碳素结构钢热轧钢板和钢带
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GBT 711-2017
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标准编号: GB/T 711-2017 (GB/T711-2017)
中文名称: 优质碳素结构钢热轧钢板和钢带
英文名称: Hot-rolled quality carbon structural steel plates sheets and strips
行业: 国家标准 (推荐)
中标分类: H46
国际标准分类: 77.140.50
字数估计: 9,942
发布日期: 2017-02-28
实施日期: 2017-11-01
旧标准 (被替代): GB/T 710-2008; GB/T 711-2008
引用标准: GB/T 222; GB/T 223.5; GB/T 223.12; GB/T 223.19; GB/T 223.23; GB/T 223.37; GB/T 223.59; GB/T 223.64; GB/T 223.68; GB/T 223.86; GB/T 224; GB/T 228.1; GB/T 229; GB/T 232; GB/T 247; GB/T 709; GB/T 2970; GB/T 2975; GB/T 4336; GB/T 6394; GB/T 8170; GB/T 13298
起草单位: 重庆钢铁股份有限公司、鞍钢股份有限公司、冶金工业信息标准研究院、首钢总公司、新余钢铁股份有限公司、河北钢铁股份有限公司唐山分公司
归口单位: 全国钢标准化技术委员会(SAC/TC 183)
标准依据: National Standard Announcement No. 4 of 2017
提出机构: 中国钢铁工业协会
发布机构: 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会
范围: 本标准规定了优质碳素结构钢热轧钢板和钢带的尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志及质量证明书。本标准适用于厚度不大于100 mm、宽度不小于600 mm的优质碳素结构钢热轧钢板和钢带(以下简称钢板和钢带)。
GB/T 711-2017: 优质碳素结构钢热轧钢板和钢带
GB/T 711-2017 英文名称: Hot-rolled quality carbon structural steel plates sheets and strips
1 范围
本标准规定了优质碳素结构钢热轧钢板和钢带的尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志及质量证明书。
本标准适用于厚度不大于100mm、宽度不小于600mm的优质碳素结构钢热轧钢板和钢带(以下
简称钢板和钢带)。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文
件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 222 钢的成品化学成分允许偏差
GB/T 223.5 钢铁 酸溶硅和全硅含量的测定 还原型硅钼酸盐分光光度法
GB/T 223.12 钢铁及合金化学分析方法 碳酸钠分离-二苯碳酰二肼光度法测定铬量
GB/T 223.19 钢铁及合金化学分析方法 新亚铜灵-三氯甲烷萃取光度法测定铜量
GB/T 223.23 钢铁及合金 镍含量的测定 丁二酮肟分光光度法
GB/T 223.37 钢铁及合金化学分析方法 蒸馏分离-靛酚蓝光度法测定氮量
GB/T 223.59 钢铁及合金 磷含量的测定 铋磷钼蓝分光光度法和锑磷钼蓝分光光度法
GB/T 223.64 钢铁及合金 锰含量的测定 火焰原子吸收光谱法
GB/T 223.68 钢铁及合金化学分析方法 管式炉内燃烧后碘酸钾滴定法测定硫含量
GB/T 223.86 钢铁及合金 总碳含量的测定 感应炉燃烧后红外吸收法
GB/T 224 钢的脱碳层深度测定法
GB/T 228.1 金属材料 拉伸试验 第1部分:室温试验方法
GB/T 229 金属材料 夏比摆锤冲击试验方法
GB/T 232 金属材料 弯曲试验方法
GB/T 247 钢板和钢带包装、标志及质量证明书的一般规定
GB/T 709 热轧钢板和钢带的尺寸、外形、重量及允许偏差
GB/T 2970 厚钢板超声波检验方法
GB/T 2975 钢及钢产品 力学性能试验取样位置及试样制备
GB/T 4336 碳素钢和中低合金钢 火花源原子发射光谱分析方法(常规法)
GB/T 6394 金属平均晶粒度测定法
GB/T 8170 数值修约规则与极限数值的表示和判定
GB/T 13298 金属显微组织检验方法
GB/T 13299 钢的显微组织评定方法
GB/T 17505 钢及钢产品交货一般技术要求
GB/T 20123 钢铁 总碳硫含量的测定 高频感应炉燃烧后红外吸收法(常规方法)
GB/T 20125 低合金钢 多元素含量的测定 电感耦合等离子体原子发射光谱法
GB/T 20066 钢和铁 化学成分测定用试样的取样和制样方法
3 订货内容
按本标准订货的合同或订单应包括下列内容:
a) 产品名称(钢板或钢带);
b) 标准编号;
c) 牌号;
d) 交货状态;
e) 尺寸及精度;
f) 边缘状态(EC或EM);
g) 重量;。
4 尺寸、外形、重量
钢板和钢带的尺寸、外形、重量及允许偏差应符合GB/T 709的规定。
5 技术要求
5.1 牌号和化学成分
5.1.1 钢的牌号和化学成分(熔炼成分)应符合表1的规定。
5.1.2 钢中残余元素铬、镍、铜含量供方若能保证合格,可不进行分析。
5.1.3 氧气转炉冶炼的钢其含氮量应不大于0.008%,供方能保证合格,可不进行分析。
5.1.4 成品钢板和钢带的化学成分允许偏差应符合GB/T 222的规定。
5.2 冶炼方法
钢由氧气转炉或电炉冶炼。
5.3 交货状态
5.3.1 钢带及剪切钢板以热轧状态交货,单张轧制钢板交货状态应符合表2的规定。
5.3.2 钢带通常不切边交货。钢板应切边交货,经供需双方协议,并在合同中注明,也可不切边状态
交货。
5.3.3 钢板和钢带以酸洗状态交货时,酸洗钢板和钢带通常涂油供货,所涂油膜应能用碱水溶液去除。
通常的包装、运输、装卸和储存条件下,供方保证自生产完成之日起3个月内不生锈。需方要求时,经供需双方协商,并在合同中注明,热轧酸洗表面也可以不涂油状态交货。
注:对于需方要求的不涂油产品,在运输、装卸、储存和使用过程中表面易产生轻微划伤和锈蚀。订货时,需方应被告知。
5.4 力学性能
5.4.1 钢板和钢带的力学性能应符合表3的规定。
a 经供需双方协议,单张轧制钢板也可以热轧状态交货,以热处理样坯测定力学性能。
5.4.2 经供需双方协商,45、45Mn及以上牌号的力学性可按实际值交货,表3中的指标仅供参考。
5.4.3 热处理状态交货的钢板,当其伸长率较表2规定提高2%以上(绝对值)时,允许抗拉强度比表2
规定降低40MPa。
5.4.4 钢板和钢带厚度大于20mm时,厚度每增加1mm断后伸长率允许降低0.25%(绝对值),厚度
不大于32mm的总降低值不得大于2%(绝对值),厚度大于32mm的总降低值不得大于3%(绝对
值)。
5.4.5 经供需双方协议,厚度不小于6mm的钢材可作20℃或-20℃低温冲击试验,10、15、20钢板的
冲击吸收能量应符合表4的规定,试验温度应在合同中注明,其他牌号的试验温度和冲击吸收能量由双方协议。
5.4.6 除表4列的温度外,可测定其他温度的V型冲击吸收能量,其值由双方协议。
5.4.7 夏比(V型缺口)冲击吸收能量,按3个试样的算术平均值计算,允许其中1个试样的单个值比
表4规定值低,但不得低于规定值的70%。
5.4.8 如果没有满足上述条件,可从同一抽样产品上再取3个试样进行试验,先后6个试样的平均值不得低于规定值,允许有2个试样低于规定值,但其中低于规定值70%的试样只允许1个。
5.4.9 对厚度小于12mm钢板的夏比(V型缺口)冲击试验应采用辅助试样, >8mm~< 12mm钢板
辅助试样尺寸为7.5mm×10mm×55mm,其试验结果应不小于表4规定值的75%,6mm~8mm钢
板辅助试样尺寸为5mm×10mm×55mm,其试验结果应不小于表4规定值的50%。厚度小于6mm
5.5 工艺性能
08~35号钢冷弯试验应符合表5的规定,如供方能保证合格,可不作检验。
5.6 脱碳层
经供需双方协商,35钢和含碳量更高的钢板和钢带,可进行脱碳层检验,总脱层深度每面不得大于
钢板和钢带实际厚度的2%。
5.7 超声检测
经供需双方协商,钢板可按GB/T 2970进行超声检测,检测标准和合格级别应在合同中注明。
5.8 带状组织
经供需双方协商,钢带及剪切钢板厚度不大于3mm时,15、20牌号可进行带状组织检测,其级别
5.9 晶粒度
经供需双方协商,钢带及剪切钢板厚度不大于3mm时,08、08Al、10、15、20牌号可进行晶粒度检
测,晶粒度应为6级或更细,且晶粒度不均匀性应在3个连续不同级别数内。
5.10 表面质量
5.10.1 钢板和钢带不得有目视可见分层,钢板和钢带表面不应有裂纹、气泡、折叠、夹杂、结疤和压入氧化铁皮等对使用有害的缺陷。
5.10.2 钢板和钢带不允许有妨碍检查表面缺陷的薄层氧化铁皮或铁锈及凹凸度不大于钢板和钢带厚度公差之半的麻点、凹面、划痕及其他局部缺陷,且应保证钢板和钢带允许最小厚度。
5.10.3 钢板和钢带表面局部缺陷允许清理,清理处应平滑无棱角,并应保证钢板和钢带允许最小
厚度。
5.10.4 在钢带连续生产的过程中,局部的表面缺陷不易发现并去除,因此允许带缺陷交货,但有缺陷
5.10.5 厚度大于30mm的钢板允许火焰切边,但需热处理的钢板,应在热处理前进行。
5.10.6 钢带及剪切钢板各级别表面质量特征应符合表6的规定。
6 试验方法
6.1 钢的化学成分分析方法按GB/T 223.5、GB/T 223.12、GB/T 223.19、GB/T 223.23、GB/T 223.37、GB/T 223.59、GB/T 223.64、GB/T 223.68、GB/T 223.86、GB/T 4336、GB/T 20123、GB/T 20125或通用方法的规定进行,但仲裁时应按GB/T 223.5、GB/T 223.12、GB/T 223.19、GB/T 223.23、GB/T 223.37、GB/T 223.59、GB/T 223.64、GB/T 223.68、GB/T 223.86的规定进行。
6.2 每批钢板和钢带的检验项目和试验方法应符合表7的规定。
7 检验规则
7.1 钢板和钢带的质量由供方质量技术监督部门进行检查和验收。
7.2 钢板和钢带应成批验收,每批由同一牌号、同一炉号、同一厚度、同一轧制或热处理制度的钢板和钢带组成,每批重量不大于60t。轧制卷重大于30t的钢带和连轧板可按两个轧制卷组批。
7.3 钢板和钢带的复验应符合GB/T 17505的规定。
7.5 力学性能和化学成分试验结果应采用修约值比较法进行修约,修约规则按GB/T 8170的规定
执行。
8 包装、标志及质量证明书
钢板和钢带的包装、标志及质量证明书应符合GB/T 247的规定。
GB/T 711-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 711-2008, GB/T 710-2008
Hot-Rolled Quality Carbon
Structural Steel Plates Sheets and Strips
ISSUED ON. FEBRUARY 28, 2017
IMPLEMENTED ON. NOVEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword . 3
1 Scope .. 4
2 Normative References . 4
3 Ordering Contents . 6
4 Dimension, Appearance, Weight . 6
5 Technical Requirements .. 6
6 Test Methods . 12
7 Inspection Rules . 13
8 Package, Marking and Quality Certificate .. 14
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard combined and modified the following standards like GB/T 710-2008 Hot-
Rolled Quality Carbon Structural Steel Sheets and Strips, GB/T 711-2008 Hot-rolled
Quality Carbon Structural Steel Plates, Sheets and Wide Strips.
This Standard replaced GB/T 710-2008 Hot-Rolled Quality Carbon Structural Steel
Sheets and Strips, GB/T 711-2008 Hot-rolled Quality Carbon Structural Steel Plates,
Sheets and Wide Strips; compared with GB/T 710-2008 and GB/T 711-2008, this
Standard has the major technical changes as follows.
--- Cancel the relevant brand of boiling steel;
--- Cancel the pull-edge level;
--- Increase three brands of 35Mn, 55Mn, 70Mn (see Table 1, Table 2, Table 3);
--- Tighten the control harmful elemental sulfur in steel (see Table 1);
--- Adjust the delivery status of some brands (see Table 2).
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. Chongqing Iron & Steel Company Limited,
Angang Steel Company Limited, China Metallurgical Information and Standardization
Institute, Shougang Co., Ltd., Xinyu Iron & Steel Co., Ltd., and Hebei Iron and Steel
Co., Ltd. Tangshan Branch.
Chief drafting staffs of this Standard. Du Dasong, Ye Guohua, Pu Zhimin, Zhang Weixu,
Shi Li, Liao Sangsang, Deng Cuiqing, Xie Caozhong, Guan Jichun, Yang Juanyu, Gao
Yan, Wang Xin, Liu Xuyuan, Su Haolu.
The historical editions replaced by this Standard are as follows.
--- GB/T 710-1998, GB/T 710-1991, GB/T 710-2008;
--- GB/T 711-1985, GB/T 711-1988, GB/T 711-2008.
Hot-Rolled Quality Carbon
Structural Steel Plates Sheets and Strips
1 Scope
This Standard specifies the dimension, appearance, weight, technical requirements,
test methods, inspection rules, package, marking and quality certificate of the hot-
rolled quality carbon structural steel plates sheets and strips.
This Standard is only applicable to the hot-rolled quality carbon structural steel plates
sheets and strips with thickness no greater than 100mm, width no less than 600mm
(hereinafter referred to as steel sheets and strips).
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced
Molybdosilicate Spectrophotometric Method for The Determination of Acid-Soluble
Silicon Content
GB/T 223.12 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Determination of Chromium Content
GB/T 223.19 Methods for Chemical Analysis of iron, Steel and Alloy – The
Neocuproine-Chloroform Extraction Photometric Method for the Determination of
Copper Content
GB/T 223.23 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Dimethylglyoxime Spectrophotometric Method for The Determination of Nickel
Content
GB/T 223.37 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Indophenol Blue Photometric Method for the Determination of Nitrogen Content
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content -
Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.64 Iron, Steel and Alloy - Determination of Manganese Content - Flame
Atomic Absorption Spectrometric Method
GB/T 223.68 Methods for Chemical Analysis of Iron Steel and Alloy - The
Combustion Potassium Iodate Volumetric Method for the Determination of Sulfur
Content
GB/T 223.86 Steel and Iron - Determination of Total Carbon Content - Infrared
GB/T 224 Determination of Depth of Decarburization of Steels
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1. Method of Test at Room
Temperature
GB/T 229 Metallic Materials – Charpy Notch Impact Test
GB/T 232 Metallic Materials – Bend Test
GB/T 247 General Rule of Package Mark and Certification for Steel Plates (Sheets)
and Strips
GB/T 709 Dimensions, Shape, Weight and Tolerances for Hot Rolled Steel Sheets
and Strips
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing
GB/T 4336 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents
-Spark Discharge Atomic Emission Spectrometric Method (Routine Method)
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 13298 Inspection Methods of Microstructure for Metals
GB/T 13299 Steel – Determination of Microstructure
steel plate and strip must be guaranteed.
5.10.3 The local defects on the surface of the steel plate and strip are allowed to be
cleaned; while the clean-up area shall be smooth and edge-free; the allowable
minimum thickness of steel plate and strip must be guaranteed.
5.10.4 During the continuous production of steel strips, local surface defects are not
easily found and removed; so, delivery with defects is allowed; however, the defective
part shall not exceed 6% total length of each roll of steel strip.
5.10.5 Steel plate with thickness greater than 30mm is allowed for flame trimming;
however, the steel plate requires the heat treatment shall take flame trimming before
5.10.6 The surface quality characteristics of each level of steel strip and shear steel
plates shall conform to the provisions of Table 6.
Table 6 -- Surface Quality Characteristics of Each Level of Steel Plate and Strip
Levels and
codes
Applicable surface
treatment modes Characteristics
Ordinary
surface (FA)
Pickled surface
The surface is allowed to have pits, concaves, scratches,
and other slight and local defects of which the thickness (or
height) shall not exceed half thickness tolerance of the steel
strip; however, the allowable minimum thickness of steel
plate and strip must be guaranteed; the following local
defects are also allowed to have such as serrated edges,
partially uncut edges, lack of pickling, parking spots, etc.
Higher surface
The surface is not allowed to have the local defects that may
influence the formability, such as slight scratches, slight
indentations, slight pits, slight roll marks, chromatic
aberration, etc.; the surface is allowed to have slight parking
spots after oiling; however, the surface is not allowed to have
the lack of or over pickling defects.
6 Test Methods
6.1 The analysis method for chemical compositions of steel shall be performed as
per the provisions of GB/T 223.5, GB/T 223.12, GB/T 223.19, GB/T 223.23, GB/T
20123, GB/T 20125, and general method; however, the arbitration shall be performed
as per the provisions of GB/T 223.5, GB/T 223.12, GB/T 223.19, GB/T 223.23, GB/T
223.37, GB/T 223.59, GB/T 223.64, GB/T 223.68, GB/T 223.86.
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