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改善焊接性能热轧型钢
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GBT 33968-2017
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标准编号: GB/T 33968-2017 (GB/T33968-2017)
中文名称: 改善焊接性能热轧型钢
英文名称: Hot rolled steel sections with improved weldability
行业: 国家标准 (推荐)
中标分类: H44
国际标准分类: 77.140.60
字数估计: 10,130
发布日期: 2017-07-12
实施日期: 2018-04-01
起草单位: 冶金工业信息标准研究院、马钢(集团)控股有限公司、山东钢铁股份有限公司莱芜分公司、中冶建筑研究总院有限公司、河北津西钢铁集团股份有限公司
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 33968-2017: 改善焊接性能热轧型钢
GB/T 33968-2017 英文名称: Hot rolled steel sections with improved weldability
1 范围
本标准规定了改善焊接性能热轧型钢的订货内容、分类、牌号表示方法、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。
本标准适用于采用淬火加自回火工艺(QST)生产的改善焊接性能热轧 H 型钢(以下简称“H 型
钢”)。其他热轧型钢也可参照本标准。
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 223.3 钢铁及合金化学分析方法 二安替比林甲烷磷钼酸重量法测定磷量
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 223.9 钢铁及合金 铝含量的测定 铬天青S分光光度法
GB/T 223.11 钢铁及合金 铬含量的测定 可视滴定或电位滴定法
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 223.14 钢铁及合金化学分析方法 钽试剂萃取光度法测定钒含量
GB/T 223.18 钢铁及合金化学分析方法 硫代硫酸钠分离-碘量法测定铜量
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 223.26 钢铁及合金 钼含量的测定 硫氰酸盐分光光度法
GB/T 223.32 钢铁及合金化学分析方法 次磷酸钠还原-碘量法测定砷量
GB/T 223.40 钢铁及合金 铌含量的测定 氯碘酚S分光光度法
GB/T 223.54 钢铁及合金化学分析方法 火焰原子吸收分光光度法测定镍量
GB/T 223.58 钢铁及合金化学分析方法 亚砷酸钠-亚硝酸钠滴定法测定锰量
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 223.60 钢铁及合金化学分析方法 高氯酸脱水重量法测定硅含量
GB/T 223.61 钢铁及合金化学分析方法 磷钼酸铵容量法测定磷量
GB/T 223.62 钢铁及合金化学分析方法 乙酸丁酯萃取光度法测定磷量
GB/T 223.63 钢铁及合金化学分析方法 高碘酸钠(钾)光度法测定锰量
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 223.67 钢铁及合金 硫含量的测定 次甲基蓝分光光度法
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 223.69 钢铁及合金 碳含量的测定 管式炉内燃烧后气体容量法
GB/T 223.71 钢铁及合金化学分析方法 管式炉内燃烧后重量法测定碳含量
GB/T 223.72 钢铁及合金 硫含量的测定 重量法
GB/T 223.74 钢铁及合金化学分析方法 非化合碳含量的测定
GB/T 223.76 钢铁及合金化学分析方法 火焰原子吸收光谱法测定钒量
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 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
GB/T 5313 厚度方向性能钢板
GB/T 4336 碳素钢和中低合金钢 多元素含量的测定 火花放电原子发射光谱分析方法(常规
法)
GB/T 11263 热轧H型钢和剖分T型钢
GB/T 20066 钢和铁 化学成分测定用试样的取样和制样方法
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
YB/T 081 冶金技术标准的数值修约与检测数值的判定
3 订货内容
按本标准订货的合同至少应包括以下内容:
a) 本标准编号;
b) 产品名称;
c) 牌号;
d) 规格、长度及重量(或数量)。
4 分类、牌号表示方法
4.1 分类
H型钢按强度级别分类为355、420、460、500。
4.2 牌号表示方法
钢的牌号由“屈服强度”汉语拼音首字母、屈服强度数值、“QST”等三个部分组成。
5 尺寸、外形、重量及允许偏差
H型钢的尺寸、外形、重量及允许偏差应符合GB/T 11263的规定。经供需双方协商,并在合同中
注明,也可采用其他标准的规定。
6 技术要求
6.1 钢的牌号和化学成分
6.1.1 钢的牌号和化学成分(熔炼分析)应符合表1的规定。经供需双方协议,并在合同中注明,也可
供应其他牌号和化学成分的型钢。
6.1.2 钢的成品化学成分允许偏差应符合GB/T 222的规定。
6.2 碳当量
H型钢的碳当量应符合表2规定。
6.3 冶炼方法
钢由电炉或转炉冶炼,必要时进行炉外精炼。
6.4 交货状态
H型钢应以淬火加自回火状态交货。自回火温度不低于600℃。
6.5 力学性能
H型钢的力学性能和工艺性能应符合表3的规定。
6.6 冲击
6.6.1 厚度不小于6mm 的H型钢应做冲击试验。冲击试样尺寸取10mm×10mm×55mm的标准
试样。当不足以制取标准试样时,应采用小尺寸试样,当采用7.5mm×10mm×55mm试样时,其试
验结果应不小于规定值的75%;当采用5mm×10mm×55mm,其试验结果应不小于规定值的50%,
6.6.2 H型钢的夏比(V型)冲击试验结果按一组三个试样的算术平均值计算,允许其中一个试样值低
于规定值,但不得低于规定值的70%。如果试验结果不符合上述规定时,应从同一根H型钢(或同一样坯上)再取3个试样进行试验,前后两组6个试样的算术平均值不得低于规定值,允许有2个试样小于规定值,但其中小于规定值70% 的试样只允许有1个。
6.7 表面质量
H型钢的表面质量应符合 GB/T 11263的规定。经供需双方协商并在合同中注明,也可按
YB/T 4427或相关标准的规定。
6.8 厚度方向性能
厚度方向性能应符合GB/T 5313的规定。
6.9 超声检测
6.9.1 有厚度方向性能要求的H型钢应进行超声检测。
6.9.3 超声检测可按GB/T 2970或ASTMA898/A898M或相关协议对型钢进行。其检验数量、合格
级别应在合同中注明。
6.10 焊接
6.10.1 H型钢不预热进行焊接应满足如下条件。
a) 焊接材料中氢含量应小于10mL/100g;
b) 环境温度大于0℃;
c) 焊接时焊件未处于复杂的刚性约束中。
6.10.2 其他焊接条件和工艺还应符合相关焊接规范要求。
7 试验方法
8 检验规则
8.1 检查和验收
H型钢的检查和验收由供方技术质量监督部门进行。需方有权按本标准进行检查和验收。
8.2 组批规则
H型钢应成批进行检查和验收,每批由同一牌号、同一炉号、同一规格的H型钢组成。每批重量不大于60t。
8.3 复验与判定
H型钢的复检和判定应符合GB/T 2101的规定。
8.4 数值修约
检验结果的数值修约应符合YB/T 081的规定。
型钢的包装、标志及质量证明书应符合GB/T 2101的规定。
GB/T 33968-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 44
Hot Rolled Steel Sections
with Improved Weldability
ISSUED ON. JULY 12, 2017
IMPLEMENTED ON. APRIL 01, 2018
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 ... 7
4 Classification and Grade Expression Method ... 7
5 Dimension, Shape, Weight and Permissible Deviation ... 8
6 Technical Requirements ... 8
7 Test Methods ... 11
8 Inspection Rules ... 11
9 Package, Mark and Quality Certificate ... 12
Appendix A (Informative) Quenching and Self-Tempering Process (QST) ... 13
Bibliography ... 15
Hot Rolled Steel Sections
with Improved Weldability
1 Scope
This Standard specifies the ordering content, classification, grade expression method,
dimension, shape, weight and permissible deviation, technical requirements, test
methods, inspection rules, package, mark and quality certificate of hot rolled steel
sections with improved weldability.
This Standard is applicable to the hot rolled H-shaped steel sections (hereinafter
referred to as “H-shaped section steel”) with improved weldability produced by
quenching and self-tempering process (QST). Other hot rolled steel section can also
refer to this Standard.
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 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination
of Phosphorus Content
GB/T 223.5 Steel and Iron - Determination of Acid-Soluble Silicon and Total Silicon
Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron, Steel and Alloy – Determination of Aluminum Content - Chrom
Azurol S Photometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual
Titration or Potentiometric Titration Method
GB/T 223.12 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Carbonate Separation-Diphenyl Carbazide Photometric Method for the
Determination of Chromium Content
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-
Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the
Determination of Vanadium Content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Thiosulfate Separation Iodimetric Method for the Determination of Copper 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 Iron, Steel and Alloy-Determination of Nickel Content - The
Dimethylglyoxime Spectrophotometric Method
GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The
Thiocyanate Spectrophotometric Method
GB/T 223.32 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Hypophosphite Reduction-Iodimetric Method for the Determination of Arsenic
Content
Sulphochlorophenol S Spectrophotometric Method
GB/T 223.54 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrophotometric Method for the Determination of Nickel
Content
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Arsenite-Sodium Nitrite Titrimetric Method for the Determination of Manganese
Content
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content -
Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon
Content
GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Ammonium Phosphomolybdate Volumetric Method for the Determination of
Phosphorus Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl
Acetate Extraction Photometric Method for the Determination of Phosphorus
Content
(Potassium) Periodate Photometric Method for the Determination of Manganese
Content
GB/T 223.64 Iron, Steel and Alloy - Determination of Manganese Content - Flame
Atomic Absorption Spectrometric Method
GB/T 223.67 Iron, Steel and Alloy - Determination of Sulfur Content - Methylene
Blue Spectrophotometric 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
volumetric Method after Combustion in the Pipe Furnace
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy the
Gravimetric Method after Combustion in the Pipe Furnace for the Determination
of Carbon Content
GB/T 223.72 Iron, Steel and Alloy - Determination of Sulfur Content - Gravimetric
Method
GB/T 223.74 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Combustion Gravimetric/Gas-Volumetric Method for the Determination of
Combined Carbon Content
Atomic Absorption Spectrometric Method for the Determination of Vanadium
Content
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 2101 General Provisions on Acceptance, Package, Marking and Quality
Certificate for Profile Steel
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing
6.6.1 The H-shaped section steel with thickness no less than 6mm shall do the
impact test. The impact test specimen size shall be standard one of 10mm × 10mm ×
55mm. When it is insufficient to prepare the standard specimen, take small size
specimen; if the specimen size is 7.5mm × 10mm × 55mm, then the test result shall
be no less than 75% of the specified value; if the specimen size is 5mm × 10mm ×
55mm, then the test result shall be no less than 50% of the specified value. However,
the larger size specimen shall be preferred.
6.6.2 The Charpy (V-shaped) impact test results for H-shaped section steel shall be
based on the arithmetic average of a set of three specimens; thereof, one of the
specified value. If the test results don’t meet the above requirements, take another
three specimens form the same H-shaped section steel (or from the same billet); the
arithmetic average of the six specimens in two groups shall be no less than the
specified value; thereof, two specimens are allowed to be less than the specified value;
but only one of them less than 70% of specified value is allowed.
6.7 Surface quality
The surface quality of H-shaped section steel shall conform to the provisions of GB/T
11263. Through the negotiation between the supplier and the purchaser, indicated in
the contract, the provisions of YB/T 4427 or relevant standard shall be subject to.
The thickness direction performance shall meet the requirements of GB/T 5313.
6.9 Ultrasonic test
6.9.1 H-shaped section steel with thickness direction performance requirements shall
take the ultrasonic test.
6.9.2 Through the negotiation between the supplier and the purchaser, indicated in
the contract, other H-shaped section steels can also take the ultrasonic test.
6.9.3 Ultrasonic test can be performed against the section steel according to GB/T
2970 or ASTM A898/A898M or relevant agreement. The test quantity and compliance
level shall be indicated in the contract.
6.10.1 The welding of H-shaped section steel without preheating shall meet the
following conditions.
a) The hydrogen content in the welding material shall be less than 10mL/100g;
b) The ambient temperature is greater than 0°C;
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