GB/T 11263-2017 (GB/T11263-2017, GBT 11263-2017, GBT11263-2017) & related versions
Buy with any currencies (Euro, JPY, KRW...): GB/T 11263-2017 Preview this PDF: GB/T 11263-2017
GB/T 11263-2017: PDF in English (GBT 11263-2017)
GB/T 11263-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.70
H 44
Replacing GB/T 11263-2010
Hot rolled H and cut T section steel
ISSUED ON. MAY 31, 2017
IMPLEMENTED ON. DECEMBER 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 ... 4
2 Normative references ... 4
3 Ordering content ... 5
4 Classification and codes ... 5
5 Dimensions, shapes, weights and tolerances ... 6
6 Technical requirements ... 17
8 Inspection rules ... 19
9 Packaging, marking and quality certification ... 20
Annex A (Informative) Sectional dimensions, sectional areas, theoretical
weights and sectional characteristics of hot rolled H section steel ... 21
Annex B (Informative) Sectional dimensions, sectional areas, theoretical
weights and sectional characteristics of hot rolled H section steel ... 26
Annex C (Informative) Sectional dimensions, sectional areas, theoretical
weights and sectional characteristics of hot rolled H section steel ... 29
Annex D (Informative) Sectional dimensions, sectional areas, theoretical
weights and sectional characteristics of hot rolled H section steel ... 32
Annex E (Informative) Supplementary detailed rules for defect welding
repair of hot rolled H and cut T section steel ... 35
Annex F (Informative) Comparison of types and sectional characteristic
parameters of international hot rolled I section steel and international hot rolled
H section steel ... 37
Annex G (Informative) Sectional dimensions, sectional areas, theoretical
weights and sectional characteristics of super-thick super-heavy H section steel
... 40
Bibliography ... 43
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 11263-2010, Hot rolled H and cut T section steel.
Compared with GB/T 11263-2010, the major changes are as follows.
-- it changes the requirements for dimensions and tolerances of H section steel in
Table 3;
-- it changes the test items, sample quantities and test methods in Table 6;
-- it adjusts Annex A to Annex E and changes the content;
-- it adjusts Annex B to Annex G and modifies specifications;
-- it adds Annex A, Annex B, Annex C and Annex D.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee 183 on
Steels of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this Standard. Magang (Group) Holdings Co., Ltd.,
Shandong Iron and Steel Group Co., Ltd. Laiwu Controlled Company, China
Metallurgical Information and Standardization Institute, Hebei Jinxi Iron and Steel
Group Co., Ltd., Rizhao Steel Holding Group Co., Ltd., Central Research Institute of
Building and Construction Co., Ltd., Anshan Baode Iron and Steel Co., Ltd., Tianjin
Zhongzhong Technology and Engineering Co., Ltd.
The main drafters of this Standard. Wu Baoqiao, Wang Zhongxue, Wang Limin, Xi Tie,
Feng Chao, Zhao Yichen, Wei Zhenzhou, Wu Mingchao, Wang Hongxin, Chen
Yanliang, Liu Baoshi, Zhang Weibin, Zhao Xinhua, Zhang Baoju, Tian Xuebo, Cheng
Ding, Wang Yujie, Liu Chunying, Jiang Hongliang, Yang Yingdong.
The previous editions of the standard replaced by this Standard are as follows.
-- GB/T 11263-1998, GB/T 11263-2005, GB/T 11263-2010.
Hot rolled H and cut T section steel
1 Scope
This Standard specifies the ordering content, classification, codes, dimensions,
shapes, weights-tolerances, technical requirements, test methods, inspection rules,
packaging, marking and quality certificate of hot rolled H and cut T section steel cut
from hot rolled H section steel.
This Standard applies to hot rolled H section steel (hereinafter referred to as H section
steel) and T section steel cut from hot rolled H section steel.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies 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 229, Metallic materials - Charpy pendulum impact test method
GB/T 232, Metallic materials – Bend test
GB/T 700, Carbon structural steels
GB/T 712, Ship and ocean engineering structural steel
GB/T 714, Structural steel for bridge
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
GB/T 4171, Atmospheric corrosion resisting structural steel
GB/T 4336, Carbon and low-alloy steel – Determination of multi-element contents
– Spark discharge atomic emission spectrometric method (routine method)
GB/T 19879, Steel plates for building structure
GB/T 20066, Steel and iron – sampling and preparation of samples for the
determination of chemical composition
3 Ordering content
The purchase contract based on this Standard shall include the following technical
content.
a) product name and category;
b) designation;
c) standard number;
d) specifications;
e) delivery length;
f) weight and quantity;
g) other special requirements of the purchaser, such as special specification
requirements and special surface quality requirements.
4 Classification and codes
4.1 H section steel includes four categories, whose codes are as follows.
Wide flange H section steel HW (W is the initial of Wide);
Middle flange H section steel HM (M is the initial of Middle);
Narrow flange H section steel HN (N is the initial of Narrow);
Thin-wall H section steel HT (T is the initial of Thin).
4.2 Cut T section steel includes three categories, whose codes are as follows.
Wide flange cut T section steel TW (W is the initial of Wide);
Middle flange cut T section steel TM (M is the initial of Middle);
Narrow flange cut T section steel TN (N is the initial of Narrow).
6.4 Surface quality
6.4.1 The surface of H and cut T section steel shall be free from defects detrimental
to use, such as cracks, folds, scars, layers and inclusions. Local slight defects are
allowed, such as cracks, pits, bulges, hard spots and scratches, but they shall not
exceed the thickness tolerances. The defects of H and cut T section steel are allowed
to be removed using the mechanical methods such as chipping and grinding; the
defects are allowed to be repaired by welding; some clauses of welding repair and
welding repair quality inspection can be executed as specified in Annex A. The removal
and welding repair shall be executed as specified in 6.4.2 and 6.4.3.
6.4.2 Removal shall meet the following requirements.
a) after the removal of H section steel and cut T section steel, the sectional
dimensions shall be within the tolerance range. With the user’s consent, the
restriction may also be extended for different purposes;
b) the surface of junction between the removed spot and the former rolled surface
shall be smooth without corners or edges. The width of removing shall not be
less than 5 times of the removing depth.
c) if the removing depth is not greater than the specified tolerance range after
removing, it can be delivered directly without welding repair.
6.4.3 Welding repair shall meet the following requirements.
If the dimensions of the removed spots exceed the allowable negative deviation after
the defects are removed, metal welding repair can be done for the spots of defect
removal, but shall meet the following criteria.
a) The surface defects of H and cut T section steel shall be removed completely
before welding repair, using the mechanical methods such as chipping and sand
wheel grinding, and then surfacing repair is carried out. The spots of defect
removal shall be ground after welding repair and maintained consistent with the
former rolled surface.
b) The depth of the defect parts removed before welding repair shall be less than
30% of the thickness of the surface removed.
c) The total area of welding repair shall be less than 2% of the total surface area of
H section steel or cut T section steel and the maximum area of each welding
repair spot shall be less than 150 cm2.
d) Welding repair shall be done using an appropriate welding repair process in
accordance with the designation of steel.
e) The welded outer edge of H and cut T section steel shall be free from undercut
and overlap. The height of weld ripples of reinforced weld seams shall be at least
1.5 mm above the former rolled surface; after reinforced weld seams and weld
Annex E
(Informative)
Supplementary detailed rules for defect welding repair of hot rolled H
and cut T section steel
E.1 Welding repair
E.1.1 Welding rods shall be dried before welding; the preheating temperature is
usually 350°C; the duration is 1 h. Use short-arc operation during welding repair;
narrow weld pass is preferred; the welding repair current is controlled at middle limit;
the base metal shall be kept dry during welding repair. The use of low-hydrogen
welding rods is recommended.
E.1.2 The welding repair operating environment shall be as specified in GB 50661.
E.1.3 Use appropriate methods, such as sand wheel grinding, to repair the spots of
welding repair, remove prominent metal and make the welding repair spots smooth
and flush with the rolled surface. Do not polish continuously at a fixed point to make
the surface appear blue.
E.2 Welding repair quality inspection
E.2.1 Observe the appearance of the welding repair spots. the welding repair spots
and heat affected zones shall be smooth and pleasing to the eye, without surface
cracks, undercuts, visible pores, inclusions or other defects. In case of any surface
defect, it shall be removed carefully and completely before welding repair is done once
again.
E.2.2 Use measuring tools such as straight steel ruler to examine the smoothness
degree of welding repair surface; the welding repair spots shall be flush with the rolled
surface. The height of weld seams and weld ripples shall be the same as that of the
former rolled surface.
E.2.3 The inspection of the welding repair spots and heat affected zones shall be
carried out as specified in GB 50661.
E.2.4 The same location of the welding repair spots shall not be reworked for more
than twice.
E.2.5 Each welding repair spot shall be recorded in detail. The content usually
includes. designations, specifications and batch numbers of products to be repaired
by welding; types and locations of surface defects; whether preheating and slow
cooling measures are taken; designations and specifications of welding rods; quality
......
| Standard ID | GB/T 11263-2017 (GB/T11263-2017) | | Description (Translated English) | Hot rolled H and cut T section steel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H44 | | Classification of International Standard | 77.140.70 | | Word Count Estimation | 37,317 | | Date of Issue | 2017-05-31 | | Date of Implementation | 2017-12-01 | | Older Standard (superseded by this standard) | GB/T 11263-2010 | | Quoted Standard | GB/T 222; GB/T 228.1; GB/T 229; GB/T 232; GB/T 700; GB/T 712; GB/T 714; GB/T 1591; GB/T 2101; GB/T 2975; GB/T 4171; GB/T 4336; GB/T 19879; GB/T 20066 | | Proposing organization | China Iron and Steel Industry Association | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration Committee | | Summary | This standard specifies the order, classification, code, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking, quality of the hot-rolled H-beam and T-section steel by hot-rolled H-beam certificate. This standard applies to hot-rolled H-beam (hereinafter referred to as H-shaped steel) and by the hot-rolled H-section of the T-section steel. |
|