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GB/T 3078-2008 English PDF (GBT3078-2008)

GB/T 3078-2008 English PDF (GBT3078-2008)

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GB/T 3078-2008: Quality structural steel cold drawn bars

This Standard specifies the classification, ordering information, dimensions, shape and allowable deviation, technical requirements, test methods, inspection rules, packing, marking, and quality certificate of structural steel cold drawn and ground bars. This Standard is applicable to the quality carbon structural steel and alloy structural steel (round steel, square steel, and hexagonal steel) cold drawn steel bars.
GB/T 3078-2008
GB
ICS 77.140.20
H 40
National Standard
of the PEOPLE Republic of China
Replacing GB/T 3078-1994
Quality Structural Steel Cold Drawn Bars
ISSUED ON. MAY 13, 2008
IMPLEMENTED ON. NOVEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification ... 8
4 Ordering information ... 8
5 Dimension, shape, and allowable deviation ... 9
6 Technical requirements ... 9
7 Test methods ... 15
8 Inspection rules ... 16
9 Packing, marking, and quality certificate ... 17
Foreword
This Standard replaces GB/T 3078-1994 "Technical Requirements for Quality Structural Steel Cold Drawn Bars".
Compared with GB/T 3078-1994, the main changes in this Standard are as follows. ?€? The standard name was changed from "Technical Requirements for Quality Structural Steel Cold Drawn Bars" into "Quality Structural Steel Cold Drawn Bars";
?€? DELETE non-cutting processing steels in the classification;
?€? ADD the "ordering information";
?€? DELETE specification of the chemical composition of steels for cold upsetting; ?€? ADD specification of "smelting process";
?€? ADD specification of the cold drawn-ground delivery condition;
?€? ADJUST the hardness values of 38CrSi and 38CrMoAlA delivered at cold drawn condition;
?€? DELETE specification of the mechanical properties of steels that are delivered at annealed condition and are used for cold upsetting;
?€? ADD specification of the sample surface after upset forging;
?€? DELETE the specification that "the total decarburized layer depth at one side of the ground bars may not be larger than 1.0%D";
?€? DELETE specification of the surface quality of non-cutting process steels. This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of the National Technical Committee on Iron and Steel of Standardization Administration of China.
Drafting organizations of this Standard. Chongqing Donghua Special Steel Co., Ltd., and Metallurgical Information and Standardization Institute.
Main drafters of this Standard. Li Qingyan, Liu Baoshi, Dai Qiang, and Luan Yan. The previous editions replaced by this Standard are as follows.
?€? GB 3078-1982, and GB/T 3078-1994.
Quality Structural Steel Cold Drawn Bars
1 Scope
This Standard specifies the classification, ordering information, dimensions, shape and allowable deviation, technical requirements, test methods, inspection rules, packing, marking, and quality certificate of structural steel cold drawn and ground bars.
This Standard is applicable to the quality carbon structural steel and alloy structural steel (round steel, square steel, and hexagonal steel) cold drawn steel bars. 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
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 223.13 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Ferrous Sulfate Titration Method for the Determination of Vanadium 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 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chromotropic Acid Photometric Method for the Determination of Titanium Content 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 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy; The Neocuproine-chloroform Extraction Photometric Method for the Determination of Copper Content
GB/T 223.23 Iron Steel and Alloy - Determination of Nickel Content - The Dimethylglyoxime Spectrophotometric Method
GB/T 223.24 Methods for Chemical Analysis of Iron, Steel and Alloy - The Extraction Seperation - The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy - The Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content GB/T 223.26 Iron Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.43 Methods for Chemical Analysis of Iron, Steel and Alloy -
Determination of Tungsten Content
GB/T 223.49 Methods for Chemical Analysis of Iron, Steel and Alloy - Extraction Separation-Chlorophosphonazo mA Spectrophotometric Method for the
Determination of the Total Rare Earth 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 - The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content
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 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Phosphomolybdate Volumetric Method for the Determination of
Phosphorus 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 223.66 Methods for Chemical Analysis of Iron, Steel and Alloy - The Thiocyanate-chlorpromazine Hydrochloride-chloroform Extraction Photometric Method for the Determination of Tungsten Content
GB/T 223.67 Iron Steel and Alloy - Determination of Sulfur Content - Methylene Blue Spectrophotometric Method
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 Iron Steel and Alloy - Determination of Carbon Contents -
Gas-volumetric Method after Combustion in the Pipe Furnace
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.72 Iron Steel and Alloy - Determination of Sulfur Content - Gravimetric Method
GB/T 223.75 Methods for Chemical Analysis of Iron, Steel and Alloy -The Methanol Distillation-curcumin Photometric Method for the Determination of Boron 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 224 Determination of Depth of Decarburization of Steel
GB/T 225 Steel - Hardenability Test...

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