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GB/T 1591-2008 English PDF (GBT1591-2008)

GB/T 1591-2008 English PDF (GBT1591-2008)

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GB/T 1591-2008: [GB 1591-2018] High strength low alloy structural steels

This standard specifies the high strength low alloy structural steels grade, dimension, shape, weight, allowable deviation, technical requirements, test methods, test rules, packaging, mark, and quality certificate. This standard is applicable to the steel plate, steel strip, section steel and steel bar of the high strength low alloy structural steels which are with general structure or are used for the engineering.
GB/T 1591-2008
ICS 77.140.10; 77.140.50
H 46 GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing GB/T 1591-1994
High Strength Low Alloy Structural Steels
ISSUED ON. DECEMBER 6, 2008
IMPLEMENTED ON. OCTOBER 1, 2009
Jointly issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
The Standardization Administration Committee of the
People's Republic of China.
Table of Contents
Foreword ... 3
1. Scope ... 4
2. Normative References ... 4
3. Terms and Definitions ... 5
4. Grade Representation ... 6
5. Dimension, Shape, Weight and Allowable Deviation ... 6
6. Technical Requirements ... 6
7. Test Method ... 14
8. Inspection Rules ... 14
9. Packaging, Mark and Quality Certificate ... 15
Foreword
This standard is the revision to GB/T 1591-1994 "High Strength Low Alloy Structural Steels", with reference to EN 10025. 2004 "Structural Steel Hot Rolled Products". This standard replaces GB/T 1591-1994 "High Strength Low Alloy Structural Steels". Compared with GB/T 1591-1994, the main changes in this standard are as follows. ?€? Application range of the standard is expanded;
?€? Graded intensity scales of the Q500, Q550, Q620 and Q690 are added; and graded intensity scale of Q295 is deleted;
?€? The requirements of the chemical composition of the steel products are modified; and harmful elements such as phosphorus and sulfur are controlled more strictly; ?€? Calculation formula and requirements of the carbon equivalent and crack sensitivity coefficient of the steel products are added;
?€? Delivery state of the steel products is modified; and the requirements of the quenched and tempered steel are deleted;
?€? The requirements for mechanical properties and thickness class width of the steel products are modified; and lower yield strength is clearly defined as the yield strength; ?€? Impact absorption energy value is increased;
?€? Requirements for the thickness directional property of all graded steels are added. This standard was proposed by China Iron and Steel Association.
This standard shall be under the jurisdiction of China Steel Standardization Technical Committee.
Drafting organizations of this standard. Angang Steel Co., Ltd.; China Metallurgical Information Standardization Research Institute; Jigang Group Co., Ltd.; Shougang Group; Jiangsu Shagang Group Co., Ltd., and Hunan Hualing Lianyuan Steel Co., Ltd. Chief drafting staffs of this standard. LIU Xuyuan, PU Zhimin, WANG Xiaohu, GAO Ling, WANG Liping, HUANG Zhengyu, ZHOU Jian, MA Yupu, and CHEN Shuqin.
The previous versions replaced by this standard are.
?€? GB 1591-1979, GB 1591-1988 and GB/T 1591-1994.
High Strength Low Alloy Structural Steels
1. Scope
This standard specifies the high strength low alloy structural steels?€? grade, dimension, shape, weight, allowable deviation, technical requirements, test methods, test rules, packaging, mark, and quality certificate.
This standard is applicable to the steel plate, steel strip, section steel and steel bar of the high strength low alloy structural steels which are with general structure or are used for the engineering.
2. Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For date reference, the subsequent amendments to (excluding amending error in the text) or revisions of, any of these publications do not apply. And parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, its latest edition referred to applies.
GB/T 222 Allowable Deviation of Steel Product Analysis
GB/T 223.5 Iron and steel. reduced silicate spectrophotometric method for the determination of the acid soluble silicon and all silicon content
GB/T 223.9 Steel and alloy. the chrome azurol S spectrophotometric method for the determination of aluminum content;
GB/T 223.12 Chemical analysis method for steel and alloy. the sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
GB/T 223.14 Chemical analysis method for steel and alloy. the
N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.16 Chemical analysis method for steel and alloy. the chromotropic acid photometric method for the determination of titanium content
GB/T 223.19 Chemical analysis method for steel and alloy. the neocuproine-chloroform extraction photometric method for the determination of copper content
GB/T 223.23 Steel and alloy. the dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.26 Steel and alloy. the thiocyanate spectrophotometric method for the determination of molybdenum content
GB/T 223. 37 Chemical analysis method for steel and alloy. the indophenol blue photometric method for the determination of nitrogen content after distillation separation; GB/T 223. 40 Steel and alloy. the chlorsulphophenol S spectrophotometric method for the determination of niobium content;
GB/T 223. 62 GB/T 223.62 Chemical analysis method for steel and alloy. phosphorus quantity measured according to butyl acetate extraction-photometric method; GB/T 223. 63 Chemical analysis method for steel and alloy. the sodium (potassium) periodate photometric method for the determination of manganese content GB/T 223. 67 Iron and steel and alloy. the methylene blue spectrophotometric method for the determination of sulfur content
GB/T 223. 69 Iron and steel and alloy. the gas-volumetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223. 78 Chemical analysis method for steel and alloy. curcumin direct photometric method for the determination of boron content
GB/T 228 Metallic Materials-Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892.1998)
GB/T 229 Metal material- Charpy pendulum impact test (GB/T 229-2007, ISO 148-1. 2006, MOD)
GB/T 232 Metal materials. bending test method (GB/T 232-1999, eqv ISO 7438.1985) GB/T 247 General rule of acceptance, package, mark and certification for steel plates (sheets) and steel strips
GB/T 2101 General Rule of Acceptance, Package, Mark and Certification for Section Steel GB/T 2975 Steel and Steel Products-Mechanical Testing for Sampling Location and Specimen Preparation (GB/T 2975-1998, eqv ISO 377. 1997)
GB/T 4336 Method for Photoelectric Emission Spectroscopic Analysis of Carbon Steel and Medium and Low Alloy Steel (conventional)
GB/T 5313 Through-thickness property steel plate (GB/T 5313-1985, eqv ISO 7778.1983) GB/T 17505 Steel and steel products. general technical delivery requirements (GB/T 17505-1998, eqv ISO 404. 1992)
GB/T 20066 Steel and iron-sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, 150 14284.1996, IDT)
GB/T 20125 Low alloy steel-inductively coupled plasma emission spectrometer for the determination of multielement content
YB/T 081 Rule for rounding off of numerical values and judgment of testing values for technical standards of metallurgy
3. Terms and Definitions
3.1 Thermomechanical rolling
The ultimate deformation is a rolling procedure, which is carried out within a certain temperature range. This procedure makes the material obtain the special performance which is not obtained only through heat treatment.
Note 1. If the temperature is increased to 580?? after the rolling, the material strength value may be reduced. If it is necessary to increase the temperature to 580??, it shall be supplied by the seller. Note 2. Thermomechanical rolling delivery state may contain accelerated cooling or accelerated cooling plus tempering (contain self tempering), but excludes direct quenching or quenching plus tempering. 3.2 Normalizing rolling
The ultimate formation is a rolling procedure, which is carried out within a certain temperature range. This procedure makes the material obtain the performance which is equivalent to that after the normalizing.
4. Grade Representation
Steel grade is composed of three parts - Chinese phonetic alphabet, numerical value of the yield strength, and quality classification. For instance, Q345D; in which. Q ?€? is the first letter of the Chinese phonetic alphabet of the word "Qu" of the steel yield strength;
345 ?€? is the numerical value of the yield strength (MPa);
D ?€? is the quality classification; D grade.
When the buyer requires that the steel plate has through-thickness property, the symbol which stands for the grade of the through-thickness (Z direction) property shall be added and based on the aforesaid specified grade; for instance. Q345DZ15.
5. Dimension, Shape, Weight and Allowable Deviation
Dimension, ...

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