GB 912-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 912-2008 | English | 70 |
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[GB/T 912-2008] Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels
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| GB/T 912-1989 | English | 199 |
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Hot-rolled plain carbon and low alloy structural steel sheets and strips
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GB 912-2008: [GB/T 912-2008] Hot-rolled sheets and strips of carbon structural steels and high strength low alloy 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/GB912-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 912-1989
Hot-rolled Sheets and Strips of Carbon
Structural Steels and High Strength Low Alloy
Structural Steels
(ISO 4995.2001 (E), ISO 4996.1999 (E) NEQ)
Issued on. OCTOBER 24, 2008
Implemented on. OCTOBER 1, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Ordering Information... 6
4 Size, Appearance, Weight and Permissible Deviation... 7
5 Technical Requirements... 7
6 Test Methods... 9
7 Inspection Rules... 9
8 Packing, Marking and Quality Certificate... 9
9 Rounding off of Numerical Values... 10
Foreword
This standard is the compulsory-provisions standard; 5.1.2, 5.4.1, 5.4.3 and 8.2
are the compulsory clauses.
This standard is not equivalent to "Hot-rolled Steel Sheet of Structural Quality" (ISO
4995.2001 (E)) and "Hot-rolled Steel Sheet of High Yield Stress Structural Quality"
(ISO 4996.1999 (E)).
This standard replaces "Hot-rolled Sheets and Strips of Carbon Structural Steels and
High Strength Low Alloy Structural Steels" (GB/T 912-1989). Compared with GB/T
912-1989, the main changes of this standard are as follows.
— Change from voluntary standard to standard with compulsory-provisions;
— Delete the content related to ply-rolling steel plate in the former standard;
— Adjust the thickness range of products;
— Add the "ordering information";
— Change the delivery state;
— Modify the requirements of surface quality.
This standard was proposed by China Iron and Steel Association.
This standard shall be under the jurisdiction of the National Technical Committee on
Iron and Steel of Standardization Administration of China.
Chief drafting organizations of this standard. Guangdong Entry-Exit Inspection and
Quarantine Bureau, Metallurgical Information and Standardization Institute and Benxi
Iron & Steel (group) Co. Ltd.
Chief drafting staffs of this standard. Li Chengming, Peng Xiaogang, Wang Xaiohu,
Zhang Zhenkun, Zhou Qi, Zhang Xianfeng, Liu Jianbin, Cao Biao and Pei Yu.
The previous edition replaced by this standard is as follows.
— GB/T 912-1989.
Hot-rolled Plates and Strips of Carbon Structural
Steels and High Strength Low Alloy Structural Steels
1 Scope
This standard specifies the ordering information, size, appearance, weight and
permissible deviation, technical requirements, test methods, inspection rules, packing,
marking and quality certificate of hot-rolled plates and strips of carbon structural steels
and high strength low alloy structural steels.
This standard is applicable to hot-rolled plates and strips of carbon structural steels
and high strength low alloy structural steels with thickness less than 3 mm.
2 Normative References
The following standards contain provisions which, through reference in this text,
constitute provisions of this standard. For dated reference, subsequent amendments
to, or revisions of, any of these publications do not apply. However, all parties coming
to an agreement according to this standard are encouraged to study whether the
latest edition of these documents is applicable. For undated references, the latest
edition of the normative document is applicable to these specifications.
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 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Cupferron Separation-chrome Azurol S Photometric Method for the Determination
of Aluminium Content
3 Ordering Information
3.1 The order contract or order according to this standard shall include the following
contents.
4 Size, Appearance, Weight and Permissible Deviation
The size, shape, weight and permissible deviation for steel plate, sheet and strip shall
meet the requirements of GB/T 709.
5 Technical Requirements
5.1 Designation and chemical composition
5.1.1 The designation and chemical composition of steel shall meet the
requirements specified in GB/T 700 and GB/T 1591.
5.2 Smelting process
By converter or electro-smelting.
5.3 Delivery condition
The steel plate and strip shall be delivered with hot rolling or annealed condition.
5.4 Mechanical property and processing property
5.4.1 Tensile strength and elongation percentage of steel sheet and strip shall meet
the requirements of GB/T 700 and GB/T 1591, but the elongation percentage is
permitted to be 5 % less (absolute value) than that specified in GB/T 700 or GB/T
1591.
5.5 Surface quality
5.5.1 Harmful defects, such as the scar, crack, fold, inclusion, bubble and embed
iron-oxide-scale, shall be free from the surface of the steel sheet and strip. Steel sheet
and strip shall be free from any delaminate.
5.5.2 Local defects, such as iron oxide scale in thin layer, corrosion and slight
pockmark, which do not affect using, are allowed to exist on the surface of the steel
sheet and strip. The convex-concave shall not exceed half of the thickness deviation
of the steel sheet and strip, and the permitted minimum thickness of steel sheet and
strip shall be ensured.
6 Test Methods
6.1 The inspection items, sampling quantity, sampling method and test method of
each batch of steel sheet and strip shall meet the requirements specified in Table 1.
7 Inspection Rules
7.1 The inspection and acceptance of steel sheet and strip are in charge of the
supplier's technology and quality supervision department. The purchaser is entitled to
perform inspection and acceptance according to any inspection item specified in this
standard or contract.
7.4 The re-inspection and judgment of steel sheet and strip shall be carried out in
accordance with the requirements of GB/T 17505.
8 Packing, Marking and Quality Certificate
8.1 Packing, marking and quality certificate of steel sheet and strip shall meet the
requirements of GB/T 247.The type of the quality certificate may be according to the
requirements of GB/T 18253.
9 Rounding off of Numerical Values
Rounding off of numerical values shall meet the requirements of YB/T 081.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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