GB/T 20887.2-2022
Continuously hot rolled high strength steel sheet and strip for automobile—Part 2: High hole expansion steel (English Version)

Standard No.

GB/T 20887.2-2022

Language

Chinese, Available in English version

Release Date

2022

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 20887.2-2022

Replace

GB/T 20887.2-2010

Scope

This document specifies the terms and definitions, classification and designation method, ordering content, size, shape, weight, technical requirements, test methods, inspection rules, packaging and signs of high-strength hot-rolled high-expansion steel sheets and strips for automobiles. and quality certificate. This document applies to hot-rolled steel strips with a thickness not greater than 6.0 mm and high hole expansion properties, as well as the steel sheets cross-cut and slit-slit steel strips (hereinafter referred to as "steel sheets and strips").

GB/T 20887.2-2022 Referenced Document

• GB/T 10561 Standard grading chart microscopic examination method for determination of non-metallic inclusion content in steel*， 2023-05-23 Update
• GB/T 17505 Steel and steel products.General technical delivery requirements
• GB/T 18253-2018 Steel and steel products—Types of inspection documents
• 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
• GB/T 222 Permissible tolerances for chemical composition of steel products
• 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 223.54 Iron, steel and alloy—Determination of nickel content—Flame atomic absorption spectrometric method*， 2022-07-11 Update
• 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 223.63 Iron, steel and alloy—Determination of manganese content—Sodium (potassium) periodate spectrophotometric method*， 2022-07-11 Update
• GB/T 223.64 Iron,steel and alloy.Determination of manganese content.Flame atomic absorption spectrometric method
• GB/T 223.78 Methods for chemical analysis of iron,steel and alloy-Curcumin spectrophotometric method for the determination of boron content
• GB/T 223.84 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 223.9 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
• GB/T 24524 Metallic materials—Sheet and strip—Hole expanding test
• GB/T 247 General rule of package,mark and certification for steel plates(sheets)and strips
• GB/T 2975 Steel and steel products.Location and preparation of samples and test pieces for mechanical testing
• GB/T 38813 General requirements for hot-rolled pickled steel sheet and strip
• GB/T 4336 Determination of multi-element content in carbon steel and medium and low alloy steel Spark discharge atomic emission spectrometry (conventional method) Amendment No. 1
• GB/T 5028 Metallic materials.Sheet and strip.Determination of tensile strain hardening exponent
• GB/T 6394 Determination of estimating the average grain size of metal
• GB/T 709 "Dimension,shape,weight and tolerance for hot rolled steel strip,plate and sheet"
• GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 20887.2-2022 history

• 2022 GB/T 20887.2-2022 Continuously hot rolled high strength steel sheet and strip for automobile—Part 2: High hole expansion steel
• 2010 GB/T 20887.2-2010 Continuously hot rolled high strength steel sheet and strip for automobile.Part 2:High hole expansion steel

GB/T 20887.2-2022 -All Parts