This standard specifies the dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates, etc. of the cold rolled sheets and strips for deep drawing (hereinafter referred to as sheets and strips).
This standard applies to high quality cold rolled low carbon sheets and strips and interstitial-free steel sheets and strips used for deep drawing complex parts in automotive industry.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All the standards will be modified, however, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB/T 222-1984 Method of Sampling Steel for Determination of Chemical Composition and Permissible Variations for Product Analysis
GB/T 223.3-1988 Methods for Chemical Analysis of Iron, Steel and Alloy—The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.5-1997 Methods for Chemical Analysis of Iron, Steel and Alloy; the Reduced Molybdosilicate Spectrophotometric Method for the Determination of Acid-soluble Silicon Content
GB/T 223.10-2000 Methods for Chemical Analysis of Iron, Steel and Alloy—The Cupferron Separation—Chrome Azurol S Photometric Method for the Determination of Aluminium Content
GB/T 223.12-1991 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 223.53-1987 Methods for Chemical Analysis of Iron, Steel and Alloy—The Flame Atomic Absorption Spectrometric Method for the Determination of Copper Content
GB/T 223.54-1987 Methods for Chemical Analysis of Iron, Steel and Alloy—The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.62-1988 Methods for Chemical Analysis of Iron, Steel and Alloy—The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T 223.63-1988 Methods for Chemical Analysis of Iron, Steel and Alloy—The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.67-1989 Methods for Chemical Analysis of Iron, Steel and Alloy—The Reducing Distillation-Methylene Blue Photometric Method for the Determination of Sulfur Content
GB/T 223.72-1991 Methods for Chemical Analysis of Iron, Steel and Alloy—The Alumina Chromatographic Separation—Barium Sulfate Gravimetric Method for the Determination of Sulphur Content
GB/T 223.74-1997 Methods for Chemical Analysis of Iron, Steel and Alloy—The Combustion Gravimetric/gas-volumetric Method for the Determination of Combined Carbon Content
GB/T 228-1987 Metallic Materials—Tensile Testing
GB/T 232-1999 Metallic Materials-Bend Test
GB/T 247-1997 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 708-1988 Dimension Shape Weight and Tolerance for Cold-rolled Steel Plates and Sheets
GB/T 2975-1998 Steel and Steel Products—Location and Preparation of Test Pieces for Mechanical Testing
GB/T 4156-1984 Metals; Cupping Testing Method (Thickness 0.2~2mm)
GB/T 4335-1984 Determination of Ferrite Grain Size for Cold Rolled Low Carbon Steel Sheets
GB/T 4336-1984 Method for Photoelectric Emission Spectroscopic Analysis of Carbon Steel Medium and Low Alloy Steel
(USD)