GB/T 20887.2-2010
Continuously hot rolled high strength steel sheet and strip for automobile.Part 2:High hole expansion steel (English Version)

Standard No.

GB/T 20887.2-2010

Language

Chinese, Available in English version

Release Date

2010

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2022-11

Replace By

GB/T 20887.2-2022

Latest

GB/T 20887.2-2022

Scope

This part specifies the classification and code, size, shape, weight, technical requirements, inspection and test, packaging, marking and quality certificate of high-hole-enlarging hot-rolled steel sheets and strips. This section applies to hot-rolled steel strips with a thickness not greater than 6mm and high hole-expanding properties, as well as cross-cut steel sheets and slit-cut slit steel strips.

GB/T 20887.2-2010 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 15825.4 Sheet metal formability and test methods.Part 4:Hole expanding test
• GB/T 222 Permissible tolerances for chemical composition of steel products
• 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 223.17 Methods for chemical analysis of iron,steel and alloy--The diantipyrylmethane 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 223.5 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 223.59 Iron,steel and alloy.Determination of phosphorus content.Bismuth phosphomolybdate blue spectrophotometic method and antimony phosphomolybdate blue spectruophotometric 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 223.62 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 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 223.9 Iron,steel and alloy.Determination of aluminium content.Chrome azurol S photometric method
• GB/T 228 Metallic materials--Tensile testing at ambient temperature
• 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*， 2018-05-14 Update
• 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 6394 Determination of estimating the average grain size of metal*， 2017-02-28 Update
• GB/T 709 "Dimension,shape,weight and tolerance for hot rolled steel strip,plate and sheet"*， 2019-03-25 Update
• GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 20887.2-2010 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 20887.2-2010 -All Parts