GB/T 4226-2009 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
GB/T 4226-2009: Cold finished stainless steel bar Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 4226: Historical versions
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/GBT4226-2009GB 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 ContentsForeword... 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... 18ForewordThis 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 Bar1 ScopeThis 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 referencesThe 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 Content3 Order ContentsThe contract or order ordering according to this standard shall cover.4 Classification and Code Number4.1 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 Deviations5.1 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 MethodTest items and test methods of each batch of steel bars shall be in accordance with those specified in Table 7.8 Inspection Rules8.1 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 rules9 Packing, Marking and Quality Certificate9.1 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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