Detail of YB/T 4213-2010

Introduction of YB/T 4213-2010

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. Annex A of this standard is normative. This standard was proposed by China Iron and Steel Association. This standard is under the jurisdiction of National Technical Committee on Iron and Steel of Standardization Administration of China. Continuously hot-dip zinc (aluminum-zinc) coated steel sheet and strip with restricted hazardous substance 1 Scope This standard specifies the terms, classification and code, order details, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of continuously hot-dip zinc (aluminum-zinc) coated steel sheet and strip with restricted hazardous substance. This standard is applicable to continuously hot-dip zinc (aluminum-zinc) coated steel sheet and strip with restricted hazardous substance with a width of not less than 600 mm and a nominal thickness of 0.35 mm to 3.00 mm. 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 - Chrom azurol S photometric method GB/T 223.10 Methods for chemical analysis of iron, steel and alloy - The cupferron separation-chrome azurol S photometric method for the determination of aluminium content GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method 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 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content GB/T 228 Metallic materials - Tensile testing at ambient 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 1839 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products 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 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low - Alloy steel (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 14978 Continuously hot-dip aluminum-zinc alloy coated steel sheet and strip GB/T 17505 Steel and steel products - General technical delivery requirements GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests 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) YB/T 4217.1 Coatings of the hot dip galvanizing(zinc-aluminum) sheet - Determination of hexavalent Cr content - Spectrophotometric method YB/T 4217.2 Coatings of the hot dip galvanizing(zinc-aluminum) sheet - Determination of Hg content - Atomic absorption spectrometric method YB/T 4217.3 Coatings of the hot dip galvanizing(zinc-aluminum) sheet - Determination of Pb and Cd contents - Inductively coupled plasma atomic emission spectrometric method 3 Terms and definitions For the purpose of this standard, the following terms and definitions apply.   3.1 restricted hazardous substance restricted hazardous substance refers to hazardous substance not exceeding a certain limit in the whole material that is uniform and cannot be separated mechanically, including lead, mercury, cadmium and hexavalent chromium 4 Classification and code 4.1 The steel sheet and strip shall be classified by designation and intended use as specified in Table 1. Table 1 Classification of designation and purpose Designation Intended use Pure hot-dip zinc coated steel sheet and strip Hot-dip aluminum-zinc alloy steel sheet and strip DX51D+Z DX51D+AZ For cold forming DX52D+Z DX52D+AZ DX53D+Z DX53D+AZ DX54D+Z DX54D+AZ DX56D+Z - DX57D+Z - S220GD+Z - For structure S250GD+Z S250GD+AZ S280GD+Z S280GD+AZ S320GD+Z S320GD+AZ S350GD+Z S350GD+AZ S550GD+Z S550GD+AZ 4.2 The classification of steel sheet and strip by coating type, coating form, coating surface structure and treatment shall comply with the requirements in Table 2. Table 2 Classification by coating type, coating form, coating surface structure and treatment Classification item Category Code Coating type Pure zinc coating Z Aluminum-zinc alloy coating AZ Expression of coating form Equal-thickness coating (g/m2) A Differential-thickness coating (g/m2) B/C Surface structure Pure zinc coating Mini spangle M None spangle F Aluminum-zinc alloy coating Common spangle N Surface treatment Chromium-free passivation C5 Chromium-free self-lubricating SL5 Oiling O Chromium-free passivation + oiling CO5 Treated with chromium-free anti-fingerprint film AF5 Un-treated U Note: A is the sum of the weight of coating on inner and outer surfaces of the steel strip, B is the weight of coating on the upper surface of the steel strip, and C is the weight of coating on the lower surface of the steel strip, in g/m2. 4.3 Classification and code of coating type and coating weight 4.3.1 Classification and code of double-sided equal-thickness coating type and coating weight shall comply with Table 3. As agreed between the supplier and the purchaser, steel sheet and strip with coating weight not listed in Table 3 may also be supplied.

Contents of YB/T 4213-2010

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and code 5 Information for ordering 6 Dimensions, shape, weight and tolerances 7 Technical requirements 8 Test methods 9 Inspection rules 10 Packaging, marking and quality certificate 11 Rules of rounding off Annex A (Normative) Weight calculation method for theoretical weighing