GB/T 11253-2019 PDF English
US$135.00 · In stock · Download in 9 secondsGB/T 11253-2019: Cold-rolled sheet and strip of carbon structural steels Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 11253: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 11253-2019 | English | 135 |
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Cold-rolled sheet and strip of carbon structural steels
| Valid |
| GB/T 11253-2007 | English | 75 |
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Cold-rolled sheets and strips of carbon structural steels
| Obsolete |
| GB/T 11253-1989 | English | 199 |
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Cold-rolled plain carbon and low alloy structural steel sheets and strips
| Obsolete |
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GB/T 11253-2019: Cold-rolled sheet and strip of carbon structural steels---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/GBT11253-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 11253-2007, GB/T 716-1991
Cold-rolled sheet and strip of carbon structural steels
Issued on. OCTOBER 17, 2019
Implemented on. SEPTEMBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Classification and code... 7
4 Order content... 8
5 Size, shape, weight... 8
6 Technical Requirements... 9
7 Test method... 12
8 Inspection rules... 13
9 Packaging, marking and quality certificate... 13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 11253-2007, Cold-rolled sheets and strips of
carbon structural steels and GB/T 716-1991, Cold-rolled carbon structural steel
strips. This Standard combines GB/T 11253-2007, Cold-rolled sheets and strips
of carbon structural steels and GB/T 716-1991, Cold-rolled carbon structural
steel strips. Compared with GB/T 11253-2007 and GB/T 716-1991, the major
technical changes of this Standard are as follows.
-- Modify the thickness range of steel plates and strips and the width range
of cold-rolled narrow steel plates and strips (see Chapter 1, Chapter 1 of
GB/T 11253-2007);
-- Modify the surface structure classification and code (see 3.2, 3.2 of GB/T
11253-2007);
-- Modify the order content, and add the surface structure type and oiling
regulations (see Chapter 4, Chapter 4 of GB/T 11253-2007);
-- Modify the size, shape, weight and tolerance of cold-rolled narrow steel
plates and steel strips (see Table 1, Table 1 of GB/T 716-1991);
-- Add designation-Q325 and corresponding chemical composition,
mechanical property and process property (see Table 2, Table 3, Table 4);
-- Modify the technical requirements for cold-rolled narrow steel plates and
steel strips (see Table 3, Table 3 of GB/T 716-1991);
-- Add surface structure requirements (see Table 6);
-- Add requirements of rounding off of numerical values (see 8.4);
-- Delete the quality certificate type regulations for steel plates and strips (see
Chapter 9 of GB/T 11253-2007).
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee
183 on Iron and Steel of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this Standard. Angang Steel Company Limited,
China Metallurgical Information and Standardization Institute, Shougang Group
Co., Ltd., Hunan Valin Lianyuan Iron and Steel Co., Ltd., Guangxi Liuzhou Iron
and Steel Group Company Limited.
The drafters of this Standard. Su Haolu, Huang Qiuju, Li Qian, Hou Jie, Tang
Mu, Tian Fei, Jiang Cailing, Qi Bing, Guan Jichun, Zhang Weixu, Wang Haiquan,
Yang Yuebiao, Wang Yue, Xin Lifeng.
The previous versions of the standards which are replaced by this Standard are.
-- GB/T 11253-1989, GB/T 11253-2007;
-- GB/T716-1983, GB/T716-1991.
Cold-rolled sheet and strip of carbon structural steels
1 Scope
This Standard specifies the order content, size, shape, weight, technical
requirements, test methods, inspection rules, packaging, marking and quality
certificates of cold-rolled sheet and strip of carbon structural steels.
This Standard applies to cold-rolled sheet and strip of carbon structural steels
with a thickness of not more than 4 mm, including cold-rolled wide strip and
shear steel strip, slit steel strip (referred to as wide steel plate and steel strip)
with a width of not less than 600 mm AND cold-rolled narrow steel strip and
shear steel plate (referred to as narrow steel plate and steel strip) with a width
range of 250mm ~ < 600mm. A single cold-rolled steel sheet of which the width
is not less than 600 mm can also refer to it to perform.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies 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 223.9, Iron, steel and alloy. Determination of aluminium content.
Chrome azurol S photometric method
GB/T 223.11, Iron, steel and alloy. Determination of chromium content. Visual
titration or potentiometric titration method
GB/T 223.18, Methods for chemical analysis of iron steel and alloy. The
sodium thiosulfate separation iodimetric method for the determination of
cupper content
3 Classification and code
3.1 Steel plates and strips are divided according to surface quality.
3.2 Steel plates and strips are divided according to their surface structure.
4 Order content
4.1 The contract or order in accordance with this Standard shall include the
following information.
4.2 If the size and unevenness accuracy, surface quality level, surface structure
type, edge state and packaging method are not indicated in the order contract,
the standard products are supplied to pitted-surface oil-coated cutting-edge
plats or strips according to ordinary grade and unevenness accuracy, higher
level surface quality and surface structure, and packaged according to the
packaging that is provided by the supplier.
5 Size, shape, weight
5.1 The size, shape, weight and allowable deviation of wide steel plates and
steel strips shall comply with the provisions of GB/T 708.
5.2 The size, shape, weight and allowable deviation of narrow steel plates and
steel strips shall comply with the provisions of GB/T 15391, of which, the
allowable deviation of width shall comply with the requirements of Table 1.
6 Technical Requirements
6.1 Designation and chemical composition
6.1.1 The steel designation and chemical composition (melting analysis) shall
comply with the requirements of Table 2.
6.1.2 When aluminum is used to deoxidize, the content of acid-soluble
aluminum (Als) in the steel shall not be less than 0.015%, or the total aluminum
(Alt) content shall not be less than 0.020%.
6.1.3 The residual elements, such as chromium, nickel and copper contents, in
the steel, which can be guaranteed by the supplier, can be free from analysis.
6.1.4 The nitrogen content in the steel, which is guaranteed by the supplier, can
be free from analysis.
6.1.5 Under the condition that the mechanical properties of steel comply with
the requirements of this Standard, the carbon, manganese and silicon contents
Designation
6.1.6 The allowable deviation of chemical composition of the finished steel
product shall comply with the provisions of GB/T 222.
6.2 Smelting method
Steels are smelted by oxygen converter or electric furnace. Unless the buyer
has special requirements and it is specified in the contract, the smelting method
is generally determined by the supplier.
6.3 Delivery status
6.4 Mechanical property
6.4.1 The horizontal tensile test of steel plates and strips that are delivered in a
flat state after annealing shall comply with the requirements of Table 3.If the
horizontal sample cannot be taken on the narrow steel plate and steel strip due
to the width, the vertical sample is taken for tensile test; the mechanical property
qualification value is determined by the supplier and the buyer.
6.5 Surface quality
6.5.1 The surface of steel plates and steel strips shall be free of defects such
as air bubbles, cracks, crusting, folding and inclusions that are harmful to the
use. Steel plates and strips shall not be visually layered.
6.6 Surface structure
6.6.1 The surface structure of the steel strips is divided into three types. The
characteristics and requirements are shown in Table 6.
7 Test method
7.1 For the chemical composition test of steel, generally perform according to
GB/T 4336, GB/T 20123 or general chemical analysis methods; for the
arbitration, perform according to the provisions of GB/T 223.3, GB/T 223.9,
GB/T 223.11, GB/T 223.18, GB/T 223.19, GB/T 223.23, GB/T 223.37, GB/T
223.58, GB/T 223.59, GB/T 223.60, GB/T 223.63, GB/T 223.64, GB/T 223.68,
7.2 The inspection items, sampling quantities, sampling methods and test
methods for each batch of steel plates and strips shall comply with the
requirements of Table 7.
8 Inspection rules
8.1 Inspection and acceptance of steel plates and strips shall be carried out by
the supplier's quality supervision and inspection department.
8.2 Steel plates and steel strips shall be accepted in batches. Each batch
consists of steel plates and steel strips of the same designation, the same heat
number, the same thickness and the same heat treatment system.
8.4 The chemical composition and mechanical properties test results shall be
rounded-off according to the rounding value comparison method in GB/T 8770.
The rounding rules shall be in accordance with the provisions of GB/T 8170.
9 Packaging, marking and quality certificate
The packaging, marking and quality certificate of steel plates and steel strips
shall comply with the provisions of GB/T 247.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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