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热轧花纹钢板及钢带
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GBT 33974-2017
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标准编号: GB/T 33974-2017 (GB/T33974-2017)
中文名称: 热轧花纹钢板及钢带
英文名称: Hot rolling checker steel sheet and strip
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: 10,146
发布日期: 2017-07-12
实施日期: 2018-04-01
起草单位: 本钢集团有限公司、冶金工业信息标准研究院、鞍钢股份有限公司
归口单位: 全国钢标准化技术委员会(SAC/TC 183)
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 33974-2017: 热轧花纹钢板及钢带
GB/T 33974-2017 英文名称: Hot rolling checker steel sheet and strip
1 范围
本标准规定了热轧花纹钢板及钢带的分类和代号、订货内容、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。
本标准适用于厚度为1.4mm~16.0mm的菱形、扁豆形、圆豆形和组合形的热轧花纹钢板及钢带
(以下简称钢板及钢带)。
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 228.1 金属材料 拉伸试验 第1部分:室温试验方法
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 700 碳素结构钢
GB/T 709 热轧钢板和钢带的尺寸、外形、重量及允许偏差
GB/T 712 船舶及海洋工程用结构钢
GB/T 1591 低合金高强度结构钢
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 4171 耐候结构钢
GB/T 8170 数值俢约规则与极限数值的表示和判定
GB/T 17505 钢及钢产品 交货一般技术要求
GB/T 20066 钢和铁 化学成分测定用试样的取样和制样方法
3 分类和代号
3.1 按边缘状态分类如下:
a) 切边,EC;
b) 不切边,EM。
3.2 按花纹形状分类如下:
a) 菱形,LX;
b) 扁豆形,BD;
c) 圆豆形,YD。
4 订货内容
4.1 按本标准订货的合同或订单应包括下列内容:
a) 本标准编号;
b) 牌号;
c) 产品类别(钢板或钢带);
d) 规格;
e) 花纹形状;
f) 边缘状态;
g) 其他要求。
4.2 标记示例
按本标准交货的,牌号为Q235B,尺寸为3.0mm×1250mm×2500mm,不切边扁豆形花纹钢板,
其标记为:
5 尺寸、外形、重量
5.1 钢板及钢带的尺寸应符合表1的规定。经供需双方协商,可供应其他尺寸的钢板及钢带。
5.2 钢板及钢带花纹的尺寸、外形及其分布均为参考值,如图1~图4所示。图中各项尺寸为生产厂加工轧辊时控制用,不作为成品钢板及钢带检查的依据。经供需双方协商,可提供其他形状的钢板及钢带。
5.3 钢板及钢带的基本厚度允许偏差和纹高应符合表2的规定。中间尺寸的基本厚度允许偏差按相邻的较大尺寸的允许偏差规定,中间尺寸的纹高按相邻的较小尺寸的纹高规定。
5.4 钢板的不平度应符合表3的规定。
5.5 钢板及钢带的其他尺寸和外形应符合GB/T 709的规定。
5.6 钢板及钢带按实际重量交货。根据需方要求,钢板可参考附录A,按理论重量交货。
6 技术要求
6.1 牌号和化学成分
6.1.1 钢的牌号和化学成分(熔炼分析)应符合GB/T 700、GB/T 712、GB/T 1591、GB/T 4171的规定。
经供需双方协议,可供应其他牌号的钢板及钢带。
6.1.2 钢板及钢带的成品化学成分允许偏差应符合GB/T 222的规定。
6.2 交货状态
6.2.1 钢板及钢带以热轧状态交货。
6.2.2 钢板及钢带通常以不切边状态供货,根据需方要求并在合同中注明,也可以切边状态供货。
6.3 力学性能
根据需方要求,并在合同中注明,可进行拉伸、弯曲试验,其性能指标应符合GB/T 700、GB/T 712、GB/T 1591、GB/T 4171的规定或按双方协议。
6.4 表面质量
6.4.1 钢板和钢带表面不应有气泡、结疤、拉裂、折叠和夹杂。钢板和钢带不应有分层。
6.4.2 钢板和钢带表面允许有薄层氧化铁皮、铁锈、由氧化铁皮脱落所形成的表面粗糙和高度或深度不超过允许偏差的其他局部缺陷。花纹应完整,花纹上允许有高度不超过厚度公差之半的局部轻微毛刺和花纹压痕。
6.4.3 在连续生产钢带的过程中,因局部的表面缺陷不易被发现和去除,因此钢带允许带缺陷交货,但有缺陷部分应不超过每卷钢带总长度的6%。
7 试验方法
7.1 钢板及钢带的基本厚度和纹高,在宽度方向距边部不小于40mm处测量。
7.2 钢板及钢带的检验项目和试验方法应符合表4的规定。
8 检验规则
8.1 钢板及钢带的检查和验收由供方质量技术监督部门进行。
8.2 钢板及钢带应成批验收。每批应由同一炉号、同一牌号、同一规格、同一花纹形状的钢板或钢带组成,亦可由同一牌号、同一规格、同一花纹形状、不同炉号组成混合批,但最大批重不应超过200t。
8.3 化学成分和力学性能的检验结果应采用修约值比较法进行修约,其修约规则应符合GB/T 8170
的规定。
8.4 钢板及钢带的复验和判定规则应符合GB/T 17505的规定。
9 包装、标志及质量证明书
钢板及钢带的包装、标志及质量证明书应符合GB/T 247的规定。
GB/T 33974-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Hot rolling checker steel sheet and strip
ISSUED ON. JULY 12, 2017
IMPLEMENTED ON. APRIL 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification and code ... 5
4 Order contents ... 5
5 Dimension, shape, weight ... 6
6 Technical requirements ... 10
7 Test methods ... 11
8 Inspection rules ... 11
9 Packaging, marking and quality certificates ... 12
Appendix A (Informative) Theoretical weighing method for hot rolling checker
steel sheet ... 13
Hot rolling checker steel sheet and strip
1 Scope
This standard specifies the classification and code number, order content,
dimensions, shape, weight, technical requirements, test methods, inspection
rules, packaging, markings and quality certificates for hot rolling checker steel
sheet and strip.
This standard applies to diamond-shaped, lentil-shaped, round bean-shaped
and combination-shaped hot rolling checker steel sheet and strip (hereinafter
referred to as steel sheet and strips) having a thickness of 1.4 mm ~ 16.0 mm.
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 standard.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at
room temperature
GB/T 232 Metallic materials - Bend test
GB/T 247 General rule of package mark and certification for steel sheets
(sheets) and strips
GB/T 700 Carbon structural steels
GB/T 709 Dimensions, shape, weight and tolerances for hot rolled steel
sheets and strips
GB/T 712 Structural steel for ship and marine engineering
GB/T 1591 High strength low alloy structural steels
GB/T 2975 Steel and steel products - Location and preparation of test pieces
for mechanical testing
GB/T 4171 Atmospheric corrosion resisting structural steel
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
GB/T 17505 Steel and steel products General technical delivery
requirements
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition
3 Classification and code
3.1 Classification by edge status is as follows.
a) Trimming, EC;
b) Not trimming, EM.
3.2 Classification by shape of the pattern is as follows.
a) Diamond, LX;
b) Lentil-shape, BD;
c) Round bean shape, YD;
d) Combined shape, ZH.
4 Order contents
a) This standard number;
b) Grade;
c) Product category (steel sheet or strip);
d) Specifications;
e) Pattern shape;
f) Edge status;
g) Other requirements.
4.2 Marking example
The untrimmed lentil-shaped pattern steel sheet which is delivered in
Thickness Flatness, not more than Measured length
1.4 ~ 2.5 15 1000
> 2.5 ~ 4.0 12
> 4.0 ~ 16.0 10
5.5 Other sizes and shapes of steel sheets and strips are to comply with the
requirements of GB/T 709.
5.6 Steel sheets and strips are delivered by actual weight. In accordance with
the requirements of the purchaser, the steel sheet can refer to Appendix A and
be delivered by theoretical weight.
6.1 Grades and chemical composition
6.1.1 The steel grade and chemical composition (smelting analysis) shall
comply with the provisions of GB/T 700, GB/T 712, GB/T 1591, and GB/T 4171.
With the agreement of the supplier and purchaser, it can supply other grades of
steel sheets and strips.
6.1.2 The allowable deviation of the chemical composition of finished steel
sheets and strips shall comply with the provisions of GB/T 222.
6.2 Delivery status
6.2.1 Steel sheets and strips are delivered in hot rolling condition.
otherwise supplied in a trimmed state as specified by the purchaser and
specified in the contract.
6.3 Mechanical properties
According to the requirements of the purchaser, and specified in the contract,
tensile and bending tests can be performed. The performance indicators shall
meet the requirements of GB/T 700, GB/T 712, GB/T 1591, and GB/T 4171 or
the agreement between the both parties.
6.4 Surface quality
6.4.1 The surface of steel sheets and strips shall be free of bubbles, scars,
and strips.
6.4.2 The surface of steel sheets and strips is allowed to have a thin layer of
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