GB/T 20887.4-2010 Continuously hot rolled high strength steel sheet and strip for automobile.Part 4:Transformation induced plasticity steel (English Version)
This part specifies the classification and code, size, shape, weight, technical requirements, inspection and test, packaging, marking and quality certificate of phase transformation induced plasticity steel hot-rolled steel sheets and strips. This section applies to hot-rolled strips of phase transformation-induced plasticity steels with a thickness not greater than 6mm and the steel sheets cross-cut and slit-slit strips.
GB/T 20887.4-2010 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 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 223.23 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 223.53 Methods for chemical analysis of iron,steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.54 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 223.9 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 5028 Metallic materials.Sheet and strip.Determination of tensile strain hardening exponent
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 20887.4-2010 history
2022GB/T 20887.4-2022 Continuously hot rolled high strength steel sheet and strip for automobile—Part 4: Transformation induced plasticity steel
2010GB/T 20887.4-2010 Continuously hot rolled high strength steel sheet and strip for automobile.Part 4:Transformation induced plasticity steel