GB/T 4226-2009Cold finished stainless steel bar (English PDF)

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".

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

5.2 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.

6 Technical Requirements Nominal dimension (diameter, side length, distance, thickness and width of opposite side)

Permissible deviation grade

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

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. […]