Detail of GB/T 25053-2010

Introduction of GB/T 25053-2010

1 Scope This standard specifies the classification and designation, dimension, shape, weight as well as permissible deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of the continuously hot rolled low carbon steel sheet and strip. This standard is applicable to hot rolling low carbon steel sheet and strip for cold forming 2 Normative References The following documents are indispensable for the application of this specification. Any dated reference, only dated edition applies to this document. For undated references, the latest edition (including all the amendments) 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 223.9 Iron Steel and Alloy - Determination of Aluminium Content - Chrom Azurol S Photometric Method 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 223.40 Iron Steel and Alloy - Detetmination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method 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 Iron Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method 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 Iron Steel and Alloy - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method 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 223.79 Iron and Steel - Determination of Multi-Element Contents - X-Ray Fluorescence Spectrometry (Routine Method) GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature GB/T 232 Metallic Materials - Bend Test GB/T 247 General Rule of Package Mark and Certification for Steel Plates (Sheets) and Strips GB/T 709 Dimension Shape Weight and Tolerances for Hot-Rolled Steel Plates and Sheets GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method) GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgment of Limiting Values GB/T 17505 Steel and Steel Products: General Technical Delivery Requirements GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical component GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method) GB/T 20125 Low-alloy Steel - Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method GB/T 20126 Unalloyed Steel - Determination of Low Carbon Content - Part 2: Infrared Absorption Method after Combustion in an Induction Furnace (With Preheating) 3 Classification and Designation 3.1 Naming method for designation The designation of steel sheets and strips consists of two parts, the first part is "HR", the capital letter of "Hot rolled", the second part is digital serial number which refers to the rolling levels.

Contents of GB/T 25053-2010

Foreword i 1 Scope 2 Normative References 3 Classification and Designation 4 Information Required for Making an Order 5 Dimension, Appearance, Weight and Permissible Deviation 6 Technical Requirements 7 Test Method 8. Inspection Rules 9 Packaging, Marking and Quality Certificate 10 Value Rounding 11 Approximate Comparison of Designations in This Standard with Those in Domestic & Foreign Standards Annex A (Informative) Approximate Comparison of Designations in This Standard with Those in Domestic & Foreign Standards