GB/T 20887.1-2017_English: PDF (GB/T20887.1-2017)
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Continuously hot rolled high strength steel sheet and strip for automobile -- Part 1: High yield strength steel for cold forming
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GB/T 20887.1-2017
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| GB/T 20887.1-2007 | English | 70 |
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Continuously hot rolled high strength steel sheet and strip for automobile -- Part 1: High yield strength steel for cold forming
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GB/T 20887.1-2007
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| Standard ID | GB/T 20887.1-2017 (GB/T20887.1-2017) | | Description (Translated English) | Continuously hot rolled high strength steel sheet and strip for automobile -- Part 1: High yield strength steel for cold forming | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Word Count Estimation | 9,911 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | Older Standard (superseded by this standard) | GB/T 20887.1-2007 | | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | | Standard ID | GB/T 20887.1-2007 (GB/T20887.1-2007) | | Description (Translated English) | Continuously hot rolled high strength steel sheet and strip for automobile. Part 1: High yield strength steel for cold forming | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Classification of International Standard | 77.140.50 | | Word Count Estimation | 9,939 | | Date of Issue | 2007-03-09 | | Date of Implementation | 2007-10-01 | | Drafting Organization | Baoshan Iron & Steel Co., Ltd. | | Administrative Organization | National Steel Standardization Technical Committee | | Regulation (derived from) | China National Standard Approval Announcement2007 No.3 (Total No.103) | | Proposing organization | China Iron and Steel Association | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the use of high yield strength for cold forming steel sheet and strip hot rolling classification and code, weight, , technical requirements, marking and quality certification, packaging, dimensions, appearance inspection and testing. This section applies to a thickness of no more than 20 mm cold forming of high yield strength steel and hot rolling of steel plates and cut each into a vertical slit cut into strips, hereinafter referred to as the steel sheet and strip. |
GB/T 20887.1-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 20887.1-2007
Continuously Hot Rolled High Strength
Steel Sheet and Strip for Automobile –
Part 1. High Yield Strength Steel for Cold Forming
ISSUED ON. SEPTEMBER 07, 2017
IMPLEMENTED ON. JUNE 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword . 3
1 Scope .. 5
2 Normative References . 5
3 Classification and Grade Expression Method .. 7
4 Ordering Contents . 8
5 Dimension, Appearance, Weight . 8
6 Technical Requirements .. 8
7 Test Methods . 11
8 Inspection Rules . 12
9 Package, Mark and Quality Certificate . 12
Appendix A (Informative) Approximate Comparison between Domestic and
Foreign Grades .. 13
Appendix B (Informative) Minimum Bend Radius Recommended for Cold
Forming . 14
Foreword
GB/T 20887 Continuously Hot Rolled High Strength Steel Sheet and Strip for
Automobile can be divided into 7 parts.
--- Part 1. High Yield Strength Steel for Cold Forming;
--- Part 2. High Hole Expansion Steel;
--- Part 3. Dual Phase Steel;
--- Part 4. Transformation Induced Plasticity Steel;
--- Part 5. Martensitic Steel;
--- Part 6. Complex Phase Steel;
--- Part 7. Steels for Hydraulic Forming.
This Part belongs to Part 1 of GB/T 20887.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part Replaced GB/T 20887.1-2007 Continuously Hot Rolled High Strength Steel
Sheet and Strip for Automobile – Part 1. High Yield Strength Steel for Cold Forming.
Compared with GB/T 20887.1-2007, this Part has the major technical changes as
follows.
--- Increase two grades of HR900F, HR960F; and their corresponding technical
requirements (see Table 1, Table 2 of this Edition);
--- Delete the provisions of residual elements (see 6.1.1 of Edition 2007);
--- Modify batch weight from 40t to 60t (see 8.2 of this Edition; 7.5 of Edition 2007);
--- Add the provisions of inspection document type (see Clause 9 of this Edition);
--- Add the informative Appendix B (see Appendix B of this Edition).
This Part was proposed by China Iron and Steel Industry Association.
This Part shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Part. Baoshan Iron & Steel Co., Ltd., Shougang
Corporation, Bengang Group Co., Ltd., China Metallurgical Information and
Standardization Institute, and Angang Steel Company Limited.
Continuously Hot Rolled High Strength
Steel Sheet and Strip for Automobile –
Part 1. High Yield Strength Steel for Cold Forming
1 Scope
This Part of GB/T 20887 specifies the classification and grade expression method,
ordering contents, dimension, appearance, weight, technical requirements, test
methods, inspection rules, package, mark and quality certificate of hot rolled high yield
strength steel sheet and strip for cold forming.
This Part is applicable to continuously hot rolled high yield strength steel strip for cold
forming, and transversely-cut steel sheet and longitudinally-cut steel strip (hereinafter
referred to as “steel sheet and strip”) made by the above steel strip.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.5 Steel and Iron - Determination of Acid-Soluble Silicon and Total Silicon
Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron Steel and Alloy - Determination of Aluminum Content - Chrom
Azurol S Photometric Method
GB/T 223.17 Methods for Chemical Analysis of Iron Steel and Alloy - The
Diantipyrylmethane Photometric Method for the Determination of Titanium Content
GB/T 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The
Thiocyanate Spectrophotometric Method
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the
Sulphochlorophenol S Spectrophotometric Method
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Extraction-Absorption Catalytic Polarographic Method for the Determination of
Manganese Content
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content -
Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.67 Iron, Steel and Alloy - Determination of Sulfur Content - Methylene
Blue Spectrophotometric Method
GB/T 223.76 Methods for Chemical Analysis if 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 223.86 Steel and Iron—Determination of Total Carbon Content—Infrared
Absorption Method after Combustion in an Induction Furnace
GB/T 228.1-2010 Metallic Materials - Tensile Testing - Part 1. Method of Test at
Room Temperature
GB/T 229 Metallic Materials - Charpy Notch Impact Test
GB/T 232 Metallic Materials – Bend Test
GB/T 247 General Rule of Package Mark and Certification for Steel Plates (Sheets)
and Strips
GB/T 709 Dimensions, Shape, Weight and Tolerances for Hot Rolled Steel Sheets
and Strips
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing
GB/T 4336 Carbon and Low-Alloy Steel – Determination of Multi-Element
Contents -Spark Discharge Atomic Emission Spectrometric Method (Routine
Method)
GB/T 6394 Metal – Methods for Estimating the Average Grain Size
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 10561 Steel - Determination of Content of Nonmetallic Inclusions -
4 Ordering Contents
4.1 The contract or purchasing list ordering products as per this Part shall include the
following contents.
a) Product name (steel sheet or strip);
b) This Part number;
c) Grade;
d) Specification and dimension, roughness accuracy;
e) Surface state (when it is pickled surface, expressed by Code “P”);
f) Surface quality level;
g) Edge state;
h) Packaging mode;
i) Weight;
j) Other special requirements.
4.2 If the ordering contact doesn’t specify the surface state, thickness accuracy, etc.;
then the products shall be supplied as per hot rolled surface, ordinary thickness
accuracy. When it is the hot rolled pickled surface, if the surface quality level and oil
use have not been specified, the products shall be delivered as per the oiled relative-
high surface (FB).
5 Dimension, Appearance, Weight
The dimension, appearance, weight and permissible tolerance of steel sheet and strip
shall conform to the provisions of GB/T 709.
6 Technical Requirements
6.1 Grade and chemical compositions
6.1.1 The grade and chemical compositions (smelting analysis) of steel shall conform
to the provisions of Table 1. Approximate comparison between domestic and foreign
standard grades can refer to Appendix A.
......
GB/T 20887.1-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Continuously Hot Rolled High Strength Steel Sheet
and Strip for Automobile – Part 1.
High Yield Strength Steel for Cold Forming
ISSUED ON. MARCH 9, 2007
IMPLEMENTED ON. OCTOBER 1, 2007
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Classification and Code ... 6
4 Information Required by Ordering ... 7
5 Size, Shape, Weight and Permissible Deviation ... 7
6 Technical Requirements ... 8
7 Inspection and Test ... 11
8 Package, Marking and Quality Certificate ... 12
9 Rounding off for Values ... 12
10 Approximate Control between Domestic and Foreign Grades ... 12
Appendix A (Informative) Approximate Control between Domestic and Foreign
Grades ... 13
Foreword
GB/T 20887 Continuously Hot Rolled High Strength Steel Sheet and Strip for
Automotive can be divided into 5 parts.
--- Part 1. High Yield Strength Steel for Cold Forming;
--- Part 2. High Hole Expansion Steel1);
--- Part 3. Dual Phase Steel1);
--- Part 4. Transformation Induced Plasticity Steel1);
--- Part 5. Martensitic Steel1).
This Part belongs to Part 1 of GB/T 20887 Continuously Hot Rolled High Strength Steel
Sheet and Strip for Automotive.
The consistence between this Part and EN10149-2.1985 Hot Rolled Flat Products
Made of High Yield Strength Steels for Cold Forming – Part 2. Delivery Conditions for
Thermomechanically Rolled Steels is inequivalent.
The Appendix A of this Part is the informative one.
This Part was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel.
Drafting organizations of this Part. Baoshan Iron & Steel Co., Ltd.
Chief drafting staffs of this Part. Huang Jinhua, Shi Hongyan, Tu Shulin, Sun
Zhongming, Xu Hongwei, and Yu Chengfeng.
1) It is proposed to be prepared.
Continuously Hot Rolled High Strength Steel Sheet
and Strip for Automobile – Part 1.
High Yield Strength Steel for Cold Forming
1 Scope
This Part specifies the classification and code, dimension, shape, weight, technical
requirements, inspection and test, package, marking and quality certificate of
continuously hot rolled high yield strength steel sheet and strip for cold forming.
This Part is applicable to no-greater-than-20mm-thick continuously hot rolled high yield
strength steel strip, and the steel sheet horizontally cut by the steel strip, as well as the
steel strip longitudinally cut by the steel strip, hereinafter referred to as steel sheet and
strip.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Part, however, parties who reach an
agreement based on this Part are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.9 Iron, Steel and Alloy - The Chrome Azurol S Photometric Method for
the Determination of Aluminium Content
GB/T 223.10 Iron, Steel and Alloy - The Cupferron Separation – The Chrome
Azurol S Photometric Method for the Determination of Aluminium Content
GB/T 223.12 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Carbonate Separation - Diphenyl Carbazide Photometric Method for the
Determination of Chromium Content
GB/T 223.17 Method for Chemical Analysis of Iron, Steel and Alloy - The
Diantipyrylmethane Photometric Method for the Determination of Titanium
Content
GB/T 223.26 Method for Chemical Analysis of Iron, Steel and Alloy - Determination
of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.40 Methods for Chemical Analysis of Iron, Steel and Alloy - The Anion-
Exchange Separation - Sulphochlorophenol S Photometric Method for the
Determination of Niobium Content
GB/T 223.53 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrophotometric Method for the Determination of Copper
Content
GB/T 223.54 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrophotometric Method for the Determination of Nickel
Content
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy – The Sodium
Arsenite – Sodium Nitrite Titrimetric Method for the Determination of Manganese
Content
GB/T 223.59 Methods for Chemical Analysis of Iron, Steel and Alloy -
Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue
Spectrophotometric Method and Antimony Phosphomolybdate Blue
Spectrophotometric Method
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon
Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl
Acetate Extraction Photometric Method for the Determination of Phosphorus
Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
(Potassium) Periodate Photometric Method for the Determination of Manganese
Content
GB/T 223.64 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrometric Method for the Determination of Manganese
Content
GB/T 223.76 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrometric Method for the Determination of Vanadium
Content (GB/T 223.76-1994, eqv ISO 9647.1989)
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 232 Metallic Materials – Bend Test (GB/T 232-1999, eqv ISO 7438.1985)
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel
Plates (Sheets) and Strips
GB/T 709 Dimensions, Shape, Weight and Tolerances for Hot Rolled Steel Sheets
and Strips
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 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents
-Spark Discharge Atomic Emission Spectrometric Method (Routine Method)
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 8170 Rules of Rounding off for Numerical Values
GB/T 10561 Steel - Determination of Content of Nonmetallic Inclusions -
Micrographic Method Using Standards Diagrams
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, ISO 14284.1996, IDT)
ASTM E 1019 Methods for Analysis of Carbon, Sulfur, Nitrogen and Oxygen in
Nickel-Based and Cobalt-Based Alloys, Iron and Steel.
3 Classification and Code
3.1 Naming method of the grade
The steel grade consists of three parts, namely, initial letters of “HR” in English “Hot
Rolled”, specified smallest yield strength value, and initial letter of “F” in English
“Forming”.
Example. HR315F
6 Technical Requirements
6.1 Chemical compositions
6.1.1 The steel chemical compositions (smelting analysis) shall conform to the
provisions of Table 1. The permissible deviation of chemical compositions of finished
steel products shall conform to the provisions of GB/T 222.
6.1.2 The contents of residual elements of copper, chromium, nickel in steel shall be
no greater than 0.30%, respectively; if the supplier can guarantee the above provision,
analysis can be ignored.
6.2 Smelting method
The steel sheet and strip used steel is smelted by oxygen converter or electric furnace.
Unless otherwise specified, the smelting method is selected by the supplier.
6.3 Delivery state
6.3.1 Steel sheet and strip are delivered in the hot rolled state.
6.3.2 When steel sheet and strip have hot rolled pickled surface, generally they shall
be delivered in the oil painting state; the painted oil film can be removed by the alkaline
solution; in the general package, transportation, loading and unloading, and storage
conditions, the supplier shall guarantee no rust within 3 months since they were...
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