GB/T 20887.1-2007 (GB/T 20887.1-2017 Newer Version) PDF English
GB/T 20887.1-2007 (GB/T20887.1-2007, GBT 20887.1-2007, GBT20887.1-2007)
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| GB/T 20887.1-2017 | English | 135 |
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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 | 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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Newer version: GB/T 20887.1-2017 Standards related to (historical): GB/T 20887.1-2017
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GB/T 20887.1-2007: PDF in English (GBT 20887.1-2007) 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...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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