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GB/T 3078-2008 (GB/T3078-2008)

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GB/T 3078-2008: PDF in English (GBT 3078-2008)

GB/T 3078-2008
GB
ICS 77.140.20
H 40
National Standard
of the People’s 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 & 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...
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.