This standard specifies the classification and designation, order information, dimension, shape, weight and permissible tolerance, technical requirements, test methods, inspection rules, and packaging, marking and quality certificate of hot-rolled steel angles for tower structure.
This standard is applicable to the hot-rolled steel angles for tower structure (hereinafter referred to as "steel angles").
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
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 223.14 Methods for chemical analysis of iron, steel and alloy - The N-benzoyl-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 223.23 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 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.53 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper 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 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.68 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 223.72 Iron, steel and alloy - Determination of sulfur content - Gravimetric method
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy notch impact test
GB/T 232 Metallic materials - Bend testing method
GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of samples and 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 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
YB/T 081 Rule for rounding off of numerical values and judgment of testing values for technical standards of metallurgy
3 Classification and designation
3.1 Classification
The steel angles are classified into Grade 235, Grade 275, Grade 345, Grade 420 and Grade 460 according to the specified minimum yield strength.
3.2 Designation expression
The designation of a steel angle consists of four parts in order: the symbol "Q" representing the yield strength of steel, the specified minimum yield strength, the quality grade, and the first letter "T" of the Chinese Pinyin "Ta” (i.e., the tower).
Example: Q235AT.
Q——the symbol representing the yield strength of steel;
235——the specified minimum yield strength, in N/mm2;
A, B, C, D, E——the quality grades respectively;
T——the first letter of the Chinese Pinyin "Ta” (i.e., the tower).
及允许偏差、技术要求、试验方法、检验规则、包装、标志及质量证明书。本标准适用于铁塔用热轧角钢。
Foreword i 1 Scope 2 Normative references 3 Classification and designation 4 Order information 5 Dimension, shape, weight and permissible tolerance 6 Technical requirements 7 Test methods 8 Inspection rules 9 Packaging, marking and quality certificate
Hot-rolled steel angles for tower structure
1 Scope
This standard specifies the classification and designation, order information, dimension, shape, weight and permissible tolerance, technical requirements, test methods, inspection rules, and packaging, marking and quality certificate of hot-rolled steel angles for tower structure.
This standard is applicable to the hot-rolled steel angles for tower structure (hereinafter referred to as "steel angles").
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
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 223.14 Methods for chemical analysis of iron, steel and alloy - The N-benzoyl-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 223.23 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 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.53 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper 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 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.68 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 223.72 Iron, steel and alloy - Determination of sulfur content - Gravimetric method
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy notch impact test
GB/T 232 Metallic materials - Bend testing method
GB/T 2101 General requirement of acceptance, packaging, marking and certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of samples and 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 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
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
YB/T 081 Rule for rounding off of numerical values and judgment of testing values for technical standards of metallurgy
3 Classification and designation
3.1 Classification
The steel angles are classified into Grade 235, Grade 275, Grade 345, Grade 420 and Grade 460 according to the specified minimum yield strength.
3.2 Designation expression
The designation of a steel angle consists of four parts in order: the symbol "Q" representing the yield strength of steel, the specified minimum yield strength, the quality grade, and the first letter "T" of the Chinese Pinyin "Ta” (i.e., the tower).
Example: Q235AT.
Q——the symbol representing the yield strength of steel;
235——the specified minimum yield strength, in N/mm2;
A, B, C, D, E——the quality grades respectively;
T——the first letter of the Chinese Pinyin "Ta” (i.e., the tower).
及允许偏差、技术要求、试验方法、检验规则、包装、标志及质量证明书。本标准适用于铁塔用热轧角钢。
Contents of YB/T 4163-2016
Foreword i
1 Scope
2 Normative references
3 Classification and designation
4 Order information
5 Dimension, shape, weight and permissible tolerance
6 Technical requirements
7 Test methods
8 Inspection rules
9 Packaging, marking and quality certificate
