GB/T 2518-2019 Continuously hot-dip zinc and zinc alloy coated steel sheet and strip English
Continuously hot-dip zinc and zinc alloy coated steel sheet and strip
1 Scope
This standard specifies the terms and definitions; classification, code and expression method for designation; order contents; dimension, shape and weight; technical requirements; test methods; inspection rules; packaging, marking, and quality certificate in connection with continuously hot-dip zinc, zinc-iron alloy, zinc-aluminum alloy and aluminum-zinc alloy coated steel sheet and strip.
This standard is applicable to steel sheets and strips with a thickness of 0.20 mm ~ 6.0 mm used in automobile, construction, household appliances and other industries.
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 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 223.14 Methods for chemical analysis of iron, steel and alloy - The n-benzoyl-n-phenylhydroxylamine extraction photometric method for the determination of vanadium
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 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S 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 223.64 Iron steel and alloyed - 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 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 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
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 (r-values)
GB/T 5028 Metallic Materials - Sheet and Strip - Determination of tensile strain hardening exponent (n-values)
GB/T 8170 Rules of rounding off for numerical values & expression and judgment 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
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption method after combustion in an induction furnace (with preheating)
GB/T 24174 Steel - Determination of Bake-Hardening-Index (BH2)
GB/T 25052-2010 Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions shape and weight
ISO 6892-1:2016 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
hot-dip zinc coating
zinc coating applied by immersing the pretreated steel strip in the molten zinc on a continuous hot-dip galvanizing line
Note: the molten zinc shall have a zinc content of at least 99%
3.2
hot-dip zinc-iron alloy coating
zinc-iron alloy coating applied by immersing the pretreated steel strip in the molten zinc on a continuous hot-dip galvanizing line
Note: the molten zinc shall have a zinc content of at least 99% A zinc-iron alloy coating is formed over the entire coating by alloying process, and the alloy coating usually has an iron content of 8% to 15%.
3.3
hot-dip zinc-aluminum alloy coating
coating applied by immersing the pretreated steel strip in the molten zinc-aluminum alloy on a continuous hot-dip zinc-aluminum alloy plating line
Note: the molten zinc-aluminum alloy contains a small amount of rare earth, about 5% of aluminum (by mass fraction), and zinc for the rest part.
3.4
hot-dip aluminum-zinc alloy coating
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Expression method of designation, classification and code
5 Order contents
6 Dimensions, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (informative) Comparison between similar designations in this standard and relevant standard at home and abroad
Annex B (Informative) Introduction and selection guide of coating types
Annex C (Normative) Mass calculation method for theoretical weighing
Annex D (Informative) Chemical composition of steel
GB/T 2518-2019 Continuously hot-dip zinc and zinc alloy coated steel sheet and strip English
Continuously hot-dip zinc and zinc alloy coated steel sheet and strip
1 Scope
This standard specifies the terms and definitions; classification, code and expression method for designation; order contents; dimension, shape and weight; technical requirements; test methods; inspection rules; packaging, marking, and quality certificate in connection with continuously hot-dip zinc, zinc-iron alloy, zinc-aluminum alloy and aluminum-zinc alloy coated steel sheet and strip.
This standard is applicable to steel sheets and strips with a thickness of 0.20 mm ~ 6.0 mm used in automobile, construction, household appliances and other industries.
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 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 223.14 Methods for chemical analysis of iron, steel and alloy - The n-benzoyl-n-phenylhydroxylamine extraction photometric method for the determination of vanadium
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 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S 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 223.64 Iron steel and alloyed - 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 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 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
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 (r-values)
GB/T 5028 Metallic Materials - Sheet and Strip - Determination of tensile strain hardening exponent (n-values)
GB/T 8170 Rules of rounding off for numerical values & expression and judgment 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
GB/T 20126 Unalloyed steel - Determination of low carbon content - Part 2: Infrared absorption method after combustion in an induction furnace (with preheating)
GB/T 24174 Steel - Determination of Bake-Hardening-Index (BH2)
GB/T 25052-2010 Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions shape and weight
ISO 6892-1:2016 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
hot-dip zinc coating
zinc coating applied by immersing the pretreated steel strip in the molten zinc on a continuous hot-dip galvanizing line
Note: the molten zinc shall have a zinc content of at least 99%
3.2
hot-dip zinc-iron alloy coating
zinc-iron alloy coating applied by immersing the pretreated steel strip in the molten zinc on a continuous hot-dip galvanizing line
Note: the molten zinc shall have a zinc content of at least 99% A zinc-iron alloy coating is formed over the entire coating by alloying process, and the alloy coating usually has an iron content of 8% to 15%.
3.3
hot-dip zinc-aluminum alloy coating
coating applied by immersing the pretreated steel strip in the molten zinc-aluminum alloy on a continuous hot-dip zinc-aluminum alloy plating line
Note: the molten zinc-aluminum alloy contains a small amount of rare earth, about 5% of aluminum (by mass fraction), and zinc for the rest part.
3.4
hot-dip aluminum-zinc alloy coating
Contents of GB/T 2518-2019
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Expression method of designation, classification and code
5 Order contents
6 Dimensions, shape and weight
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
Annex A (informative) Comparison between similar designations in this standard and relevant standard at home and abroad
Annex B (Informative) Introduction and selection guide of coating types
Annex C (Normative) Mass calculation method for theoretical weighing
Annex D (Informative) Chemical composition of steel
