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热轧型钢
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GBT 706-2016
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标准编号: GB/T 706-2016 (GB/T706-2016)
中文名称: 热轧型钢
英文名称: Hot rolled section steel
行业: 国家标准 (推荐)
中标分类: H44
国际标准分类: 77.140.70
字数估计: 22,251
发布日期: 2016-12-30
实施日期: 2017-09-01
旧标准 (被替代): GB/T 706-2008
起草单位: 马钢(集团)控股有限公司、河北津西钢铁集团股份有限公司、河北钢铁集团唐钢分公司、山东钢铁集团莱钢分公司、鞍山宝得钢铁有限公司、日照钢铁控股集团有限公司、常熟市龙腾特种钢有限公司、冶金工业信息标准研究院
归口单位: 全国钢标准化技术委员会(SCA/TC 183)
标准依据: 国家标准公告2016年第27号
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
GB/T 706-2016: 热轧型钢
GB/T 706-2016 英文名称: Hot rolled section steel
1 范围
本标准规定了热轧工字钢、热轧槽钢、热轧等边角钢、热轧不等边角钢的订货内容、尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志及质量证明书。
本标准适用于热轧等边角钢、热轧不等边角钢及腿部内侧有斜度的热轧工字钢和热轧槽钢(以下简称型钢)。
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 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 700 碳素结构钢
GB/T 1591 低合金高强度结构钢
GB/T 2101 型钢验收、包装、标志及质量证明书的一般规定
GB/T 2975 钢及钢产品 力学性能试验取样位置及试样制备
YB/T 4427 热轧型钢表面质量一般要求
3 订货内容
按本标准订货的合同应包含下列技术内容:
a) 产品名称;
b) 标准编号;
c) 牌号;
d) 型号、规格;
e) 交货长度;
f) 重量和数量。
4 尺寸、外形、重量及允许偏差
4.1 尺寸及表示方法
4.1.1 型钢的截面图示及标注符号见图1~图4。
4.1.2 型钢的截面尺寸、截面面积、理论重量及截面特性参数应分别符合附录A中表A.1~表A.4的
规定。
4.2 尺寸、外形及允许偏差
4.2.1 型钢的尺寸、外形及允许偏差应符合表1~表2的规定。根据需方要求,型钢的尺寸、外形及允许偏差也可按照供需双方协议规定。
4.2.2 工字钢的腿端外缘钝化、槽钢的腿端外缘和肩钝化不应使直径等于0.18t的圆棒通过,角钢的边端外角和顶角钝化不应使直径等于0.18d的圆棒通过。
4.2.3 工字钢、槽钢的外缘斜度和弯腰挠度、角钢的顶端直角在距端头不小于750mm处检查。
4.2.4 工字钢、槽钢的腿中间厚度(t)的允许偏差为±0.06t。
4.2.5 型钢不应有明显的扭转。
4.3 长度及允许偏差
型钢的交货长度应在合同中注明,其长度允许偏差应符合表3规定。
4.4 重量及允许偏差
4.4.1 型钢应按理论重量交货,理论重量按密度为7.85g/cm3计算。经供需双方协商并在合同中注
明,亦可按实际重量交货。
4.4.2 型钢重量允许偏差应不超过±5%。重量偏差(%)按式(1)计算。重量允许偏差适用于同一尺
寸且质量超过1吨的一批,当一批同一尺寸的质量不大于1t但根数大于10根时也适用。
4.4.3 型钢的截面面积计算公式按表4所示。
4.5 规格表示方法
工字钢:“Ⅰ”与高度值×腿宽度值×腰厚度值;
5 技术要求
5.1 牌号和化学成分
钢的牌号和化学成分(熔炼分析)应符合GB/T 700或GB/T 1591的有关规定。根据需方要求,经
供需双方协议,也可按其他牌号和化学成分供货。
5.2 力学性能
型钢的力学性能应符合GB/T 700或GB/T 1591的有关规定。根据需方要求,经供需双方协议,
也可按其他力学性能指标供货。
5.3 交货状态
型钢以热轧状态交货。
5.4 表面质量
5.4.1 型钢表面不应有裂缝、折叠、结疤、分层和夹杂。
5.4.2 型钢表面允许有局部发纹、凹坑、麻点、划痕和氧化铁皮压入等缺陷存在,但不应超出型钢尺寸的允许偏差。
5.4.3 型钢表面缺陷允许清除,清除处应圆滑无棱角,但不应进行横向清除。清除宽度不应小于清除深度的五倍,清除后的型钢尺寸不应超出尺寸的允许偏差。
5.4.4 型钢端部不应有大于5mm的毛刺。
5.4.5 根据供需双方协议,表面质量也可按YB/T 4427的规定执行。
6 试验方法
每批钢材的检验项目、取样数量、取样方法和试验方法应符合表5的规定。
7 检验规则
7.1 型钢的检查和验收由供方技术质量监督部门进行。需方有权对本标准或合同所规定的任一检验项目进行检查和验收。
7.2 型钢的组批按GB/T 700、GB/T 1591及相应标准规定。
7.3 型钢的复验和验收规则应符合GB/T 2101的规定。
8 包装、标志及质量证明书
型钢的包装、标志及质量证明书应符合GB/T 2101的规定。
GB/T 706-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.70
H 44
Replacing GB/T 706-2008
Hot rolled section steel
ISSUED ON. DECEMBER 30, 2016
IMPLEMENTED ON. SEPTEMBER 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Order contents ... 6
4 Dimension, shape, weight and allowable deviation ... 6
5 Technical requirements ... 12
6 Test methods ... 13
7 Inspection rules ... 13
8 Packaging, marking and quality certificate ... 13
Annex A (normative) Cross-sectional dimension, cross-sectional area,
theoretical weight and cross-section characteristics of section steels ... 14
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 706-2008 “Hot rolled section steel”. Compared with GB/T
706-2008, main technical changes of this Standard are as follows.
- DELETE relevant contents of hot rolled L-shape section steels (see Table 3, Table
5 and Table A.5 of 2008 edition);
- ADD order contents (see Clause 3);
- ADJUST parts of dimension, shape and allowable deviation (see Table 1 and Table
2 of this Standard, Table 1 and Table 2 of 2008 edition);
- ADJUST the requirements for the allowable deviation of weight (see 4.4 of this
Standard, 3.4 of 2008 edition);
- ADD the representing method for specification (see 4.5);
- ADJUST parameters of cross-sectional area, theoretical weight and cross-section
characteristics (see Table A.1, Table A.2, Table A.3 and Table A.4).
This Standard is proposed by China Iron and Steel Industry Association.
This Standard is under the jurisdiction of National Technical Committee on Steel of
Standardization Administration of China (SCA/TC 183).
Drafting organizations of this Standard. Magang (Group) Holdings Co., Ltd., Hebei
Jinxi Iron and Steel Group Co., Ltd., Hebei Iron and Steel Group Tangshan Branch,
Shandong Iron and Steel Group Lai Steel Branch, Anshan Baode Iron and Steel Co.,
Ltd., Rizhao Iron and Steel Holding Group Co., Ltd., Changshu Longteng Special Steel
Co., Ltd., China Metallurgical Information and Standardization Institute.
Main drafters of this Standard. Gong Qinghua, Zhao Haiyan, Zhao Yichen, Deng
Cuiqing, Wang Zhongxue, Wang Hongxin, Wang Fuliang, Zhao Xun, Liu Baoshi, Wu
Baoqiao, Chen Chunsheng, Zhao Xinhua, Wei Zhenzhou, Wang Changhua, Xi Tie,
Wang Yujie, Zhang Weibin and Zhang Buhai.
The previous version of the standard replaced by this Standard are as follows.
- GB/T 706-1965, GB/T 706-1988, GB/T 706-2008;
- GB/T 707-1965, GB/T 707-1988;
- GB/T 9787-1988;
Hot rolled section steel
1 Scope
This Standard specifies the order contents, dimension, shape, weight and allowable
deviation, technical requirements, test methods, inspection rules, packaging, marking
and quality certificate of hot rolled I-beam steels, hot rolled channel steels, hot rolled
equal angle steels and hot rolled unequal angle steels.
This Standard applies to hot rolled equal angle steels, hot rolled unequal angle steels
and hot rolled I-beam steels and hot rolled channel steels with a slope on the inside of
the leg (hereinafter referred to as section steels).
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the dated edition cited applies. For undated
references, the latest edition of the referenced document (including all amendments)
applies.
temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 232 Metallic materials - Bend test
GB/T 700 Carbon structural steels
GB/T 1591 High strength low alloy structural steels
GB/T 2101 General requirement of acceptance, packaging, marking, and
certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of test pieces for
mechanical testing
3 Order contents
The contract ordered in accordance with this Standard shall contain the following
technical contents.
a) product name;
b) standard number;
c) grade;
d) model, specification;
e) delivery length;
f) weight and quantity;
4 Dimension, shape, weight and allowable deviation
4.1 Dimension and representing method
4.1.1 Schematic diagrams and marked symbols of cross-section of section steels are
as shown in Figure 1 to Figure 4.
4.1.2 Parameters of cross-sectional dimension, cross-sectional area, theoretical
weight and cross-section characteristics of section steels shall comply with the
specifications of Tables A.1 to A.4 of Annex A.
4.2 Dimension, shape and allowable deviation
4.2.1 Dimension, shape and allowable deviation of section steels shall comply with the
dimension, shape and allowable deviation of section steels can also be specified in
accordance with the agreement between supply and demand parties.
Unequal angle steels. “∠” and long side width × short side width × edge thickness;
e.g.. ∠160 × 100 × 16.
5 Technical requirements
5.1 Grades and chemical composition
Steel grades and chemical composition (smelting analysis) shall comply with the
relevant specifications of GB/T 700 or GB/T 1591. According to the requirements of
the demand party, through the agreement between the supply and demand parties,
5.2 Mechanical properties
Mechanical properties of section steels shall comply with the relevant specifications of
GB/T 700 or GB/T 1591. According to the requirements of the demand party, through
the agreement between the supply and demand parties, steels of other mechanical
property indicators can also be supplied.
5.3 Delivery status
The steel is delivered in hot rolled state.
5.4 Surface quality
5.4.1 Surface of section steels shall not have cracks, folding, scarring, stratification
5.4.2 Surface of section steels allows existence of defects such as local hairlines, pits,
dots, scratches and iron oxide presses, but these defects shall not exceed the
allowable deviation of dimension of section steels.
5.4.3 Defects on the surface of section steels are allowed to be cleared, which shall
be smooth without edges, but horizontal clearance is not allowed. The clearance width
shall not be less than five times the clearance depth; after clearance, the dimension of
section steels shall not exceed the allowable deviation of dimension.
5.4.4 Ends of section steels shall not have burrs greater than 5 mm.
5.4.5 According to the agreement between supply and demand parties, the surface
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