GB/T 4226-2009 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 4226-2009 | English | 70 |
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Cold finished stainless steel bar
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| GB/T 4226-1984 | English | 319 |
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Cold finished stainless steel bars
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GB/T 4226-2009: Cold finished stainless steel bar---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/GBT4226-2009
GB
ICS 77.140.20
H 44
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
Replacing GB/T 4226-1984
Cold Finished Stainless Steel Bar
Issued on. OCTOBER 30, 2009
Implemented on. MAY 01, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Order Contents... 8
4 Classification and Code Number... 9
5 Dimensions, Shape, Weight and Permissible Deviations... 9
6 Technical Requirements... 11
7 Test Method... 16
8 Inspection Rules... 18
9 Packing, Marking and Quality Certificate... 18
Foreword
This Standard replaces GB/T 4226-1984 "Cold Finished Stainless Steel Bar".
Compared with the original standard, this Standard has the following major changes.
- ADD the requirements for "order contents", "classification and code" and
"smelting process";
- ADD the peeling and polishing delivery conditions for bright steel bar;
- MODIFY the requirements for dimension, shape and permissible deviation;
- DELETE the original chapter of "category and designation"; directly ADOPT the
designations specified in GB/T 1220-2007;
- REVISE "Mechanical property" TO agreed inspection items;
- ADD the macrostructure inspection items;
- ADD the agreed inspection items for "corrosion resistance";
- MODIFY the requirements for "surface quality".
This Standard is proposed by China Iron and Steel Association.
This Standard is under the jurisdiction of the National Technical Committee on Iron
and Steel of Standardization Administration of China.
Main drafting organizations of this Standard. Dongbei Special Steel Group Co., Ltd.,
Metallurgical Information and Standardization Institute, Changzhou Daping New
Stainless Steel Products Co., Ltd., Yongxing Special Stainless Steel Co., Ltd..
Main drafters of this Standard. Gu Qiang, Dai Qiang, Luan Yan, Chen Fangda, Zhu
Cheng.
The previous edition of the standards replaced by this Standard is as.
- GB/T 4226-1984.
Cold Finished Stainless Steel Bar
1 Scope
This Standard specifies the order contents, classification and code, dimensions,
shape, weight and permissible deviation, technical requirements, test methods,
inspection rules, packing, marking and quality certificate for the cold finished stainless
steel bar (general term of round steel, square steel, hexagonal steel and flat steel,
hereinafter referred to as steel bar).
This Standard is applicable to the cold-rolled or cold-drawn round steel, square steel,
hexagonal steel, flat steel and bright round steel (peeling, burnishing and polishing)
whose dimensions (diameter, side length, distance or width of opposite side,
hereinafter referred to as dimension) are not greater than 100mm.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard 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 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Diantipyrylmethane Phosphomolybdate Gravimetric Method for the
Determination of Phosphorus Content
GB/T 223.4 Alloyed Steel - Determination of Manganese Content - Potentiometric
or Visual Titration Method
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total
Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.8 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Fluoride Separation - EDTA Titration Method for the Determination of Aluminium
Content
GB/T 223.9 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chrom
Azurol S Photometric Method for the Determination of Aluminium Content
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
3 Order Contents
The contract or order ordering according to this standard shall cover.
4 Classification and Code Number
4.1 Steels shall be classified into the following two types according to the different
application and processing methods. The application and processing method of steel
bars shall be noted in the contract and the unnoted one shall be supplied as the steels
used for machining.
4.2 The steel bar is classified into the following three types according to the
manufacturing operation method.
5 Dimensions, Shape, Weight and Permissible Deviations
5.1 Nominal dimension of steel bar
5.1.1 Nominal dimension of round steel, square steel and hexagonal steel is
according to those specified in Table 1.
5.2 Dimension, shape and permissible deviation of round, square and
hexagonal steel
5.2.1 Dimension and permissible deviation of round, square and hexagonal steel shall
meet requirements of GB/T 905-1994.The part with nominal dimension greater than
80mm~100mm is according to those specified in Table 3.
5.3 Dimension, shape and permissible deviation of flat steel
5.3.1 Dimension and permissible deviation of flat steel shall meet the requirements of
GB/T 905-1994.Dimension and permissible deviation if flat steel with the nominal
dimension beyond those specified in GB/T 905-1994 shall meet those specified in
Table 3.
5.3.2 The flat steel shall be free from obvious torsion; the circle arc radius or diagonal
5.5 Dimension, shape and permissible deviation of bright steel
The dimension, shape and permissible deviation of bright steels shall meet those
specified in GB/T 3207.
6 Technical Requirements Nominal dimension (diameter, side length, distance, thickness and width of opposite side)
Permissible deviation grade
6.1 Designation and chemical composition
6.1.1 Designation, unified numerical code and chemical composition (melting analysis)
of steel shall meet the requirements of Table 1~Table 5 in GB/T 1220-2007.
6.2 Smelting process
Unless otherwise stated in the contract, the process of rough steelmaking (water) plus
external refining shall be adopted generally.
6.3 Delivery condition
The round steel bar is delivered in a cold-rolled, cold-drawn or bright (peeling,
burnishing and polishing) state; the hexagonal steel and flat steel are delivered in a
cold-rolled and cold-drawn state. As required by the demander, they may be delivered
through heat treatment and acid cleaning.
6.6 Macrostructure
6.6.1 The acid leaching macrostructure test pieces for cross section of steel bar shall
be free from any visible shrinkage hole, bubble, crack, inclusion, skull patch or white
spot. As for the steel bar used for machining, the subcutaneous defect with a depth
not greater than half of the nominal dimension tolerance is allowed.
6.7 Surface quality
6.7.1 Cold-rolled or cold-drawn round steel
6.7.1.1 The surface shall be clean and smooth without cracks, folds, scars, inclusions,
tension fractures or oxide scales; the surface of the heat-treated cold-drawn steel may
be of oxidation tint.
6.7.1.2 The surface of such steels used for machining may have pockmarks,
scratches, pulling marks, black spots, concave face, cleaning bias, lubricant trace in
depth not exceeding the nominal dimension tolerance counted starting from the actual
dimension as well as individual small hair cracks in depth of one half of the tolerance.
6.8 Specific requirements
As required by the demander and agreed by the supplier and the demander, the steel
bars with the following special requirements are supplied.
7 Test Method
Test items and test methods of each batch of steel bars shall be in accordance with
those specified in Table 7.
8 Inspection Rules
8.1 Inspection and acceptance
The inspection and acceptance of steel bar shall be carried out by the technical
quality supervision department of the supplier.
8.2 Batching rules
The steel bar shall be inspected and accepted on the batch basis. Each batch
consists of steel bars of the same designation, furnace number, processing method,
dimension and delivery condition (the same thermal treatment furnace number).
8.3 Sampling position & quantity
Sampling position and quantity for inspection of each batch of steel bar shall be in
accordance with those specified in Table 7.
8.4 Re-inspection and judgment rules
9 Packing, Marking and Quality Certificate
9.1 The packing, marking and quality certificate of cold-drawn or cold-rolled steel bar
shall meet the relevant requirements of GB/T 2101.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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