Skip to product information
1 of 10

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 16270-2009 English PDF (GBT16270-2009)

GB/T 16270-2009 English PDF (GBT16270-2009)

Regular price $70.00 USD
Regular price Sale price $70.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 16270-2009 to get it for Purchase Approval, Bank TT...

GB/T 16270-2009: High strength structural steel plates in the quenched and tempered condition

This Standard specifies designations, dimension, shape, weight, and allowable deviation, technical requirements, test method, inspection rules, packaging, marks and quality certificate of high strength structural steel plates in quenched and tempered condition.
GB/T 16270-2009
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 16270-1996
High strength structural steel plates in the
quenched and tempered condition
ISSUED ON. JUNE 25, 2009
IMPLEMENTED ON. APRIL 1, 2010
Jointly Issued by. General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the PEOPLE Republic
of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Denomination methods of designation ... 8
4 Information required when ordering ... 8
5. Size, shape, weight and allowable deviation ... 8
6 Technical Requirements ... 9
7 Test Methods ... 12
8 Inspection Rules ... 13
9 Packaging, mark and quality certificate ... 13
10 Rounding off of numerical values ... 14
11 Approximate contrast of domestic-foreign designations... 14
Appendix A ... 15
Foreword
This Standard is formulated by reference to EN 10025-6.2004 (E) "Hot rolled products of structural steels, Part 6. Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition"; ISO 4950.3-2003 "High yield strength flat products, Part 3. quenched and tempered steel"; and on the basis of production technology of domestic steel enterprise and through revising GB/T 16270-1996 "High-strength structural steel plates and strips. products supplied in the heat-treated or controlled rolled condition".
This Standard replaces GB/T 16270-1996 "High-strength structural steel plates and strips. products supplied in the heat-treated or controlled rolled condition". Compared with GB/T 16270-1996, the main changes in this Standard are as follows. ?€? Standard name is changed to "High strength structural steel plates in quenched and tempered condition";
?€? Applicable thickness is extended from 100mm to 150mm, steel strip is deleted; ?€? Q420 is deleted; 3 grades of steel Q800, Q890 and Q960 and the
corresponding technical indexes?€? specifications are added;
?€? Quality grade C, F (except grade of steel Q460) are added; compositions and performances?€? specifications of every designation are adjusted;
?€? Specifications of flexural property are deleted;
?€? Requirements of CEV are added; and ?€?taking CET as the terms of consultation by both buyer and seller?€? is supplemented;
?€? Delivery states such as normalizing, normalizing + tempering, controlled rolling are deleted.
Appendix A of this Standard is informative.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under jurisdiction of China Steel Standardization Technical Committee.
Main drafting organizations of this Standard. Bao Steel Co., Ltd, China Metallurgical Information Standardization Research Institute, and Hunan Hualin Linyuan Steel Co., Ltd.
Main drafters of this Standard. Wang Xiangru, Zhou Shenyu, Wang Xiaohu, Wen Dezhi, and Zhoujian.
High strength structural steel plates in the quenched and
tempered condition
1??Scope
This Standard specifies designations, dimension, shape, weight, and allowable deviation, technical requirements, test method, inspection rules, packaging, marks and quality certificate of high strength structural steel plates in quenched and tempered condition.
This Standard is applicable to high strength structural steel plate whose thickness shall not exceed 150mm and delivery state is slack quenching (quench plus tempering).
2??Normative??References
The following standards contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments (excluding corrigendum) or revisions of these publications do not apply. However, the parties who enter into agreement according to these specifications are encouraged to study whether the latest editions of these references are applicable. For undated references, the latest edition of the normative document is applicable to this Standard.
GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223.5 Methods for chemical analysis of steel and alloy - The reduced molybdosilicate spectro-photometric method for the determination of acid-soluble silicon content
GB/T 223.9 Iron steel and alloy - Determination of aluminium content - Chrom azurol S photometric method
GB/T 223.11 Methods for chemical analysis of iron, steel and alloy - The ammonium persulfate oxidation volumetric method for the determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N-benzoy-N-phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Methods for chemical analysis of iron, steel and alloy - The gas-volumetric method after combustion in the pipe furnace for the determination of carbon content
GB/T223.76 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of vanadium content GB/T 223.78 Methods for chemical analysis of iron, steel and alloy - Curcumin spectrophotometric 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 Metallic materials - Charpy pendulum impact test method (GB/T
229-2007, ISO 148-1.2006, MOD)
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot Rolled Sheets and Plates
GB/T 2970 Thicker Steel Plates - Method for Ultrasonic Inspection
GB/T 2975 Steel and steel products - Location and preparation of test pieces for mechanical testing (GB/T 2975-1998, eqv ISO 377.1997)
GB/T 4336 Standard test method for spark discharge atomic emission
spectrometry Spectrometric analysis of carbon and low-Alloy steel (Routine Method)
GB/T 14977 General requirement for surface condition of hot-rolled steel plates GB/T 17505 Steel and steel products General technical delivery requirements GB/T 20123 Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)(GB/T 20123-2006, ISO 15350.2000, IDT)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2. Infrared absorption method after combustion in an induction furnace (with preheating) (GB/T 20126-2006, ISO 15349-2.1999, IDT)
6??Technical??Requirements
6.1 Designation and chemical composition
6.1.1 Steel designation, chemical composition (smelting analysis) and
carbon-equivalent value CEV shall comply with the specifications of Table 1. 6.1.2 According to the requirements of the buyer, through the negotiation of both buyer and seller, and indicated in the contract, carbon-equivalent value CET can be provided at CET = C + (Mn+Mo)/10 + (Cr+Cu)/20 + Ni/40.
6.1.3 The allowable deviation of chemical composition of finished steel plate shall comply with the provisions of GB/T 222.
6.2 Smelting process
By oxygen converter or electro-smelting.
6.3 Delivery state
Delivery of steel plate shall follow the state of slack quenching (quench + tempering). 6.4 Mechanical Properties and Processing Properties
6.4.1 The mechanical properties of steel plate and processing property shall meet the requirements of Table 2.
6.4.2 Charpy pendulum impact energy shall be calculated by arithmetic mean value of three specimens from one group. It is allowed that a single-value of 1 of the samples is below the specified value of Table 2, however, it shall not be lower than 70% of the specified value.
6.4.3 If the steel plate?€?s thickness is less than 12mm, auxiliary specimen shall be adopted for Charpy pendulum impact test of steel plate. If the thickness >8mm ~ < 12mm, auxiliary specimen size of steel plate shall be 10mm * 7.5mm * 55mm; the test result shall not be less than 75% of the specified value. If the thickness is between 6mm~8mm, auxiliary specimen size of steel plate shall be 10mm * 5mm * 55mm; the test result shall not be less than 75% of the specified value. Impact test shall not be carried out for the steel plate whose thickness is less than 6mm. 6.5 Surface Quality
6.5.1 Flaw, bubble, scab, fold and inclusion etc. shall not be allow...

View full details