1 Scope
This standard specifies requirements of terms and definitions, classification and code, dimension, appearance, weight, technical specifications, inspection and test, package, mark and certification of continuously electrolytically zinc/zinc-nickel alloy steel sheet and strip (hereinafter referred to as steel sheet and strip).
This standard is applicable to electrolytically zinc/zinc-nickel alloy steel sheets and strips used in automobile, home appliances, and electron industries, etc.
2 Normative References
The following standards contain provisions which, through reference in this standard ,constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 247 General provisions of Acceptance, Package, Mark and Certification for Steel sheets (Sheets) and Strips.
GB/T 708 Dimension, Shape, Weight and Tolerance for Cold-rolled Steel sheets and Sheets"
GB/T 1839 Test method for gravimetric determination of the mass per unit area of galvanized coatings of steel products.
GB/T 5213 Cold rolled carbon steel sheet and strip
GB/T 8170 Rules for Rounding off of Numberical Values
GB/T 17505 Steel and Steel Products: General Technical Delivery Requirements (GB/T 17505-1998, eqv ISO 404: 1992)
GB/T 20564.1 Continuously cold rolled high strength steel sheet and strip for automobile - Part 1: Bake hardening steel
GB/T 20564.2 Continuously cold rolled steel sheet and strip for automobile - Part 2: dual phase steel
GB/T 20564.3 Continuously cold rolled high strength steel sheet and strip for automobile - Part 3: High strength interstitial free steel
3 Terms and Definitions
The following terms and definitions are applicable to this standard.
3.1 Electrolytic Zinc Coating(ZE)
Coating produced by galvanography through production line of continuously electrolytically zinc and constituted by pure zinc; coating is free from any minor element harmful to the binding force or painting performance of binder.
3.2 Electrolytic Zinc-Nickel Coating (ZN)
Coating produced by galvanography through production line of continuously electrolytically zinc and constituted by pure zinc; the mass fraction range of nickel in coating is around 8%~15%, and the rest compositions are zinc.
3.3 Anti-Fingerprint Treatment
Carry out passivation to the surface of steel sheet and strip, and coat anti-fingerprint film to improve the stainCresistance of electronic or electric products.
