This standard specifies the designation method, order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of steel plates for building structures. This standard is applicable to Q345GJ with a thickness of 6 mm to 200 mm, Q235GJ, Q390GJ, Q420GJ, Q460GJ with a thickness of 6 mm to 150 mm and Q500GJ with a thickness of 12 mm to 40 mm for the manufacture of high-rise building structures, long-span structures and other important building structures. , Q550GJ, Q620GJ, Q690GJ hot-rolled steel plates (hereinafter referred to as steel plates). Hot-rolled steel strips can also refer to this standard.
GB/T 19879-2015 Referenced Document
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration
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 223.5 Steel and iron.Determination of acid-soluble silicon and total silicon content.Reduced molybdosilicate 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 223.84 Steel and iron.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 and iron.Determination of total carbon content.Infrared absorption method after combustion in an induction furnace
GB/T 223.9 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature*， 2021-12-31 Update
GB/T 229 Metallic materials—Charpy pendulum impact test method*， 2020-09-29 Update
GB/T 232 Metallic materials - Bend test methods*， 2024-03-15 Update
GB/T 247 General rule of package,mark and certification for steel plates(sheets)and strips
GB/T 709-2006 Dimension, shape, weight and tolerances for hot-rolled steel plates and sheets