GB/T 19879-2023 Steel plates for building structure
1 Scope
This document specifies the designation expression methods, order contents, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of steel plate for building structure.
This document is applicable to the manufacture of high-performance hot-rolled steel plates (hereinafter referred to as steel plates) with a thickness of 6 mm to 200 mm for building structures, long-span structures and other steel structures.
It may also apply to hot-rolled steel strips by reference.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document.
For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (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 223.9 Iron, steel and alloy - Determination of aluminum content - Chrome 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 223.19 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 223.40 Iron, steel and alloy - Determination 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 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content
GB/T 223.78 Methods for chemical analysis of iron, steel and alloy - Curcumin spectrophotometric method for the determination of boron content
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-ray fluorescence spectrometry (Routine method)
GB/T 223.81 Iron, steel and alloy - Determination of total aluminum and total aluminum and total boron contents - Microwave digestion-inductively coupled plasma mass spectrometric method
GB/T 223.82 Steel and iron - Determination of hydrogen content - Thermal conductivity/infrared method after fusion under inert gas
GB/T 223.84 Steel, iron and alloy - Determination of titanium content - Diantipyrylmethane spectrophotometric method
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel, iron and alloy - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
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 709-2019 Dimension, shape, weight and tolerance for hot-rolled steel strip, plate and sheet
GB/T 2970 Method for ultrasonic testing of thicker steel plates
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/ T 5313 Steel plate with through-thickness properties
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 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 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
3 Terms and definitions
No terms and definitions are listed in this document.
4 Designation expression methods
Steel designation is composed of four parts: Q (the Chinese phonetic alphabet representing yield strength), the specified minimum yield strength, GJ (the Chinese phonetic alphabet representing steel for high performance building structure, and the quality grade symbol (B, C, D and E).
Example: Q355GJC
Q - Chinese phonetic alphabet representing yield strength;
355 - specified minimum yield strength;
GJ - high performance building structure;
C - quality grade symbol.
For steel plate with through-thickness property, the designation shall be followed by the through-thickness property level (Z15, Z25 or Z35).
Example: Q355GJCZ25
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Designation expression methods
5 Order content
6 Dimensions, shape and weight
7 Technical requirements
8 Test method
9 Inspection rules
10 Packaging, marking and quality certificate
