1 Scope
This standard specifies the dimension, appearance, weight and permissible deviation, technical requirements, test methods, test rules, packing, marking and quality certificate of atmospheric corrosion resisting structural steel.
This standard is applicable to hot-rolled and cold rolled steel plate, flat strap and section steel with resistance to atmospheric corrosion capacity for vehicle, bridge, freight container, building, tower pier and other structure appliance. Atmospheric corrosion resisting steel can be used for making bolted connection, rivet joint and welded structure component.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this code. For dated reference, subsequent modification to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is 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 223.5 Steel and iron - Determination of Acid-Soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron Steel and Alloy - Determination of Aluminium Content - Chrom Azurol S Photometric Method
GB/T 223.11 Iron steel and alloy - Determination of Chromium Content - Visual Titration Or Potentiometric Titration Method
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 223.19 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 223.26 Iron steel and alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method
GB/T 223.30 Methods for Chemical Analysis of Iron, Steel and Alloy-The Arsenazo Ⅲ Spectrophotometric Method for the Determination of Zirconium Content after Separation by P-bromomandelic Acid
GB/T 223.40 Iron steel and alloy - Detetmination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method
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 Alloyed - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method
GB/T 223.67 Steel and Alloys - Sulfur Content Method for Determination of Methylene Blue
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 223.76 Methods for chemical Analysis of Iron, Steel and Alloy the Flame Atomic Absorption Spectrometric Method for the Determination of Vanadium Content
GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 148-1: 2006, MOD)
GB/T 232 Metallic materials - Bend Test (GB/T 232-1999, eqv ISO 7438: 1985)
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 708 Dimension Shape Weight and Tolerances for Cold-Rolled Steel Plates and Sheets
GB/T 709 Dimension Shape Weight and Tolerances for Hot-Rolled Steel Plates and Sheets
GB/T 2101 General Requirements of Acceptance, Packaging, Marking, and Certification For Section Steel
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for Mechanical Testing (GB/T 2975-1998, eqv ISO 377: 1997)
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-Alloy Steel (Routine Method)
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 10561 Steel Determination of Content of Nonmetallic Inclusions Micrographic Method Using Standards Diagrams (GB/T 10561-2005, ISO 4967: 1998(E), IDT)
GB/T 17505 Steel and steel products - General technical delivery requirements (GB/T 17505-1998, eqv ISO 404:1992)
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition (GB/T 20066-2006, ISO 14284: 1996, IDT)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
YB/T 081 Rule for Rounding Off of Numberical Values and Judgment of Testing Values for Technical Standards of Metallurgy
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
Atmospheric corrosion resisting steel
Steel that is added slight amount of alloy elements like Cu, P, Cr and Ni, forming protective layer on metal base surface, to improve resistance to atmospheric corrosion
