This standard specifies the terms and definitions, classification and designation representation, order information, dimensions, shape and weight, technical requirements, test methods, inspection rules, and packaging, marking and quality certification for continuously hot-dip aluminium-silicon alloy coated steel sheets and strips.
This standard is applicable to continuously hot-dip aluminium-silicon alloy coated steel sheets and strips with a thickness of 0.30mm~3.0mm to be used on automobiles, home appliances, and buildings (hereinafter referred to as "steel sheets and strips").
Note: Hot-dip aluminium-silicon coated steel sheets and strips are also known as hot-dip aluminium coated steel sheets and strips.
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 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrome azurol S photometric method
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 223.26 Iron, steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
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 - The 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 223.68 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 223.78 Methods for chemical analysis of iron, steel and alloy - Curcumin spectrophotometric method for the determination of boron content
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 232 Metallic materials - Bend test
GB/T 247 General rule of package, mark and certification for steel plates (sheets) and strips
GB/T 2518 Continuously hot-dip zinc-coated steel sheet and 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 - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 5027 Metallic materials - Sheet and strip - Determination of plastic strain ratio
GB/T 5028 Metallic materials - Sheet and strip - Determination of tensile strain hardening exponent
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 16597 Analytical methods of metallurgical products - General rule for X-ray fluorescence spectrometric methods
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 25052-2010 Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions, shape and weight
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2518 and the following apply.
3.1
hot-dip aluminium-silicon alloy coating
coating obtained by dipping a pre-treated steel strip into a molten plating solution with a silicon content of 5%~11%, an impurity element (other than iron) content of not greater than 1%, and a residual amount of aluminium on a hot-dip aluminium-silicon production line
3.2
passivation
process of chemically treating the surfaces of steel strips or sheets with chromic acid passivation or non-chrome passivation in order to prevent white rust on them during shipment and storage
3.3
skin-passing
mild cold rolling process for hot-dip aluminium-silicon coated sheets
Note: The purposes of skin-passing are as follows:
a) To improve surface finish and appearance. However, this process has an adverse effect on the plasticity of the substrate;
b) To temporarily reduce tensile deformation or wrinkling that occurs during component processing and manufacturing;
c) To control the sheet shape.
3.4
antiprint
antiprint capacity of steel strips or sheets by applying a transparent organic coating with a thickness of approximately 1g/m2 on their surfaces
Note: This coating provides the product with properties other than corrosion resistance, especially antiprint capacity. Antiprint capacity improves the lubrication performance of the product during the forming process and may be used as a primer for subsequent painting.
3.5
hot stamping steel
steel with a ferrite and pearlite microstructure and possibly a small amount of bainite and/or martensite on the ferrite and pearlite substrate, from which the steel sheets and strips are made with a martensite substrate after hot stamping and also possibly contain a small amount of ferrite
Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and designation representation 5 Order information 6 Dimensions, shape and weight 7 Technical requirements 8 Test methods 9 Inspection rules 10 Packaging, marking and quality certification Annex A (Informative) Chemical composition of steel Annex B (Normative) Measuring method for Al-Fe-Si alloy coating weight Annex C (Normative) Determination of coating weight - Sodium hydroxide-hydrochloric acid-hexamethylenetetramine exfoliation gravimetric method Annex D (Normative) Determination of coating weight - Sodium hydroxide-hydrochloric acid exfoliation gravimetric method Annex E (Normative) Determination of coating weight - X-ray fluorescence method
GB/T 36399-2018 Continuously hot-dip aluminium-silicon alloy coated steel sheet and strip
1 Scope
This standard specifies the terms and definitions, classification and designation representation, order information, dimensions, shape and weight, technical requirements, test methods, inspection rules, and packaging, marking and quality certification for continuously hot-dip aluminium-silicon alloy coated steel sheets and strips.
This standard is applicable to continuously hot-dip aluminium-silicon alloy coated steel sheets and strips with a thickness of 0.30mm~3.0mm to be used on automobiles, home appliances, and buildings (hereinafter referred to as "steel sheets and strips").
Note: Hot-dip aluminium-silicon coated steel sheets and strips are also known as hot-dip aluminium coated steel sheets and strips.
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 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Iron, steel and alloy - Determination of aluminium content - Chrome azurol S photometric method
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 223.26 Iron, steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
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 - The 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 223.68 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 223.78 Methods for chemical analysis of iron, steel and alloy - Curcumin spectrophotometric method for the determination of boron content
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 232 Metallic materials - Bend test
GB/T 247 General rule of package, mark and certification for steel plates (sheets) and strips
GB/T 2518 Continuously hot-dip zinc-coated steel sheet and 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 - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 5027 Metallic materials - Sheet and strip - Determination of plastic strain ratio
GB/T 5028 Metallic materials - Sheet and strip - Determination of tensile strain hardening exponent
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 16597 Analytical methods of metallurgical products - General rule for X-ray fluorescence spectrometric methods
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
GB/T 25052-2010 Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions, shape and weight
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2518 and the following apply.
3.1
hot-dip aluminium-silicon alloy coating
coating obtained by dipping a pre-treated steel strip into a molten plating solution with a silicon content of 5%~11%, an impurity element (other than iron) content of not greater than 1%, and a residual amount of aluminium on a hot-dip aluminium-silicon production line
3.2
passivation
process of chemically treating the surfaces of steel strips or sheets with chromic acid passivation or non-chrome passivation in order to prevent white rust on them during shipment and storage
3.3
skin-passing
mild cold rolling process for hot-dip aluminium-silicon coated sheets
Note: The purposes of skin-passing are as follows:
a) To improve surface finish and appearance. However, this process has an adverse effect on the plasticity of the substrate;
b) To temporarily reduce tensile deformation or wrinkling that occurs during component processing and manufacturing;
c) To control the sheet shape.
3.4
antiprint
antiprint capacity of steel strips or sheets by applying a transparent organic coating with a thickness of approximately 1g/m2 on their surfaces
Note: This coating provides the product with properties other than corrosion resistance, especially antiprint capacity. Antiprint capacity improves the lubrication performance of the product during the forming process and may be used as a primer for subsequent painting.
3.5
hot stamping steel
steel with a ferrite and pearlite microstructure and possibly a small amount of bainite and/or martensite on the ferrite and pearlite substrate, from which the steel sheets and strips are made with a martensite substrate after hot stamping and also possibly contain a small amount of ferrite
Contents of GB/T 36399-2018
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation representation
5 Order information
6 Dimensions, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certification
Annex A (Informative) Chemical composition of steel
Annex B (Normative) Measuring method for Al-Fe-Si alloy coating weight
Annex C (Normative) Determination of coating weight - Sodium hydroxide-hydrochloric acid-hexamethylenetetramine exfoliation gravimetric method
Annex D (Normative) Determination of coating weight - Sodium hydroxide-hydrochloric acid exfoliation gravimetric method
Annex E (Normative) Determination of coating weight - X-ray fluorescence method
