GB/T 20564.9-2016 Continuously cold rolled high strength steel sheet and strip for automobile一Part 9:Quenching and partitfoning steel (English Version)
Continuously cold rolled high strength steel sheet and strip for automobile — Part 9: Quenching and partitioning steel
1 Scope
This part of GB/T 20564 specifies the term and definition, classification and code, order information, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of quenching and partitioning high strength steel sheets and strips.
This part is applicable to steel sheets and strips with a thickness of 0.8mm~2.5mm, which are mainly used for manufacturing automobile structural members and reinforcing members.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.4 Alloyed steel — Determination of manganese content — Potentiometric or visual titration method
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy — The sodium fluoride separation — EDTA titration method for the determination of aluminium content
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 223.23 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 223.53 Methods for chemical analysis of iron, steel and alloy — Flame atomic absorption spectrometric method for the determination of copper content
GB/T 223.59 Iron, steel and alloy — Determination of phosphorus content — Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy — Perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy—The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.67 Iron steel and alloy — Determination of sulfur content — Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy—The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron, steel and alloy — Determination of carbon contents — Gas-volumetric method after combustion in the pipe furnace
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy — The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 228.1-2010 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 247 General rule of package, mark and certification for steel plates(sheets) and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel strip and sheet
GB/T 2523 Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip)
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 — Spark discharge atomic emission spectrometric method (routine method)
GB/T 8170 Rules of rounding off for numerical values & expression and judgement 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 20125 Low-alloy steel — Determination of multi-element contents — Inductively coupled plasma atomic emission spectrometric method
3 Term and definition
For the purposes of this document, the following term and definition apply.
3.1
quenching and partitioning steels; QP
steel whose microstructure is martensite, retained austenite and ferrite, during the forming process, the retained austenite which may be transformed into martensite with high work hardening rate, uniform elongation and tensile strength, and compared with dual phase steel with the same tensile strength, which has higher elongation; compared with transformation induced plasticity steel with the same tensile strength, which has lower carbon equivalent
Foreword i
1 Scope
2 Normative references
3 Term and definition
4 Classification and code
5 Order information
6 Dimension, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (Informative) Reference values of chemical composition
GB/T 20564.9-2016 Continuously cold rolled high strength steel sheet and strip for automobile一Part 9:Quenching and partitfoning steel (English Version)
Standard No.
GB/T 20564.9-2016
Status
valid
Language
English
File Format
PDF
Word Count
5500 words
Price(USD)
110.0
Implemented on
2017-9-1
Delivery
via email in 1 business day
Detail of GB/T 20564.9-2016
Standard No.
GB/T 20564.9-2016
English Name
Continuously cold rolled high strength steel sheet and strip for automobile一Part 9:Quenching and partitfoning steel
Continuously cold rolled high strength steel sheet and strip for automobile — Part 9: Quenching and partitioning steel
1 Scope
This part of GB/T 20564 specifies the term and definition, classification and code, order information, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of quenching and partitioning high strength steel sheets and strips.
This part is applicable to steel sheets and strips with a thickness of 0.8mm~2.5mm, which are mainly used for manufacturing automobile structural members and reinforcing members.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.4 Alloyed steel — Determination of manganese content — Potentiometric or visual titration method
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy — The sodium fluoride separation — EDTA titration method for the determination of aluminium content
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 223.23 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 223.53 Methods for chemical analysis of iron, steel and alloy — Flame atomic absorption spectrometric method for the determination of copper content
GB/T 223.59 Iron, steel and alloy — Determination of phosphorus content — Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy — Perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy—The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.67 Iron steel and alloy — Determination of sulfur content — Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy—The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron, steel and alloy — Determination of carbon contents — Gas-volumetric method after combustion in the pipe furnace
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy — The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 228.1-2010 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 247 General rule of package, mark and certification for steel plates(sheets) and strips
GB/T 708 Dimension, shape, weight and tolerance for cold-rolled steel strip and sheet
GB/T 2523 Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip)
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 — Spark discharge atomic emission spectrometric method (routine method)
GB/T 8170 Rules of rounding off for numerical values & expression and judgement 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 20125 Low-alloy steel — Determination of multi-element contents — Inductively coupled plasma atomic emission spectrometric method
3 Term and definition
For the purposes of this document, the following term and definition apply.
3.1
quenching and partitioning steels; QP
steel whose microstructure is martensite, retained austenite and ferrite, during the forming process, the retained austenite which may be transformed into martensite with high work hardening rate, uniform elongation and tensile strength, and compared with dual phase steel with the same tensile strength, which has higher elongation; compared with transformation induced plasticity steel with the same tensile strength, which has lower carbon equivalent
Contents of GB/T 20564.9-2016
Foreword i
1 Scope
2 Normative references
3 Term and definition
4 Classification and code
5 Order information
6 Dimension, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (Informative) Reference values of chemical composition