GB/T 706-2016 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 706-2016 | English | 125 |
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Hot rolled section steel
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| GB/T 706-2008 | English | 105 |
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[Newer version GB/T 706-2016] Hot rolled section steel
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| GB/T 706-1988 | English | 439 |
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[Newer version GB/T 706-2016] Hot-rolled beam steel--Dimensions, shape, weight and tolerances
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GB/T 706-2016: Hot rolled section steel---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT706-2016
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;
- GB/T 9788-1988;
- GB/T 9946-1988.
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.
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 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
YB/T 4427 General requirements for surface condition of hot-rolled sections
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;
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.
4.2 Dimension, shape and allowable deviation
4.2.1 Dimension, shape and allowable deviation of section steels shall comply with the
specifications of Table 1 to Table 2.According to the requirements of the demand party,
dimension, shape and allowable deviation of section steels can also be specified in
accordance with the agreement between supply and demand parties.
4.2.2 Passivation of leg end edge of I-beam steels and passivation of leg end edge
and shoulder of channel steels shall be such that a round bar with a diameter of 0.18t
can not pass through; passivation of corner angle and vertex angle of angle steels
shall be such that a round bar with a diameter of 0.18d can not pass through.
4.2.4 Allowable deviation of leg thickness (t) of I-beam steels and channel steels is ± 0.06t.
4.2.5 Section steels shall not be significantly reversed.
4.3 Length and allowable deviation
The delivery length of section steels shall be indicated in the contract and the allowable
deviation of length shall comply with the specifications of Table 3.
4.4 Weight and allowable deviation
4.4.1 Section steels shall be delivered in theoretical weight and the theoretical weight
shall be calculated at a density of 7.85 g/cm3.
4.4.3 Calculation equations of cross-sectional area of section steels are as shown in Table 4.
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,
steels of other grades and chemical composition can also be supplied.
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
and inclusions.
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.
5.4.5 According to the agreement between supply and demand parties, the surface
quality can also be implemented in accordance with the specifications of YB/T 4427.
6 Test methods
Inspection items, sampling quantity, sampling methods and test methods of each batch
of steel shall comply with the specifications of Table 5.
7 Inspection rules
7.1 Inspection and acceptance of section steels is carried out by technical quality
supervision departments of the supply party. The demand party shall have the right to
inspect and accept any of the inspection items specified in this Standard or the contract.
7.2 Batching of section steels is in accordance with the specifications of GB/T 700,
GB/T 1591 and the corresponding standards.
7.3 Re-inspection and acceptance rules of section steels shall comply with the
specifications of GB/T 2101.
8 Packaging, marking and quality certificate
Packing, marking and quality certificate of section steels shall comply with the
specifications of GB/T2101.
Annex A
(normative)
Cross-sectional dimension, cross-sectional area, theoretical weight and cross-
section characteristics of section steels
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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