Continuously electrolytically zinc/zinc-nickel alloy steel sheet and strip
1 Scope
This standard specifies the definition, classification and code, dimensions, shape, technical requirements, inspection and testing, packaging, marking and inspection documents of continuously electrolytically zinc/zinc-nickel alloy steel sheet and strip.
This standard is applicable to continuously electrolytically zinc/zinc-nickel alloy steel sheet and strip, hereinafter referred to as steel sheet and strip, produced by Baoshan Iron and Steel Co., Ltd.
2 Normative references
The following standard contains provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition of the referenced document applies.
GB/T 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
Q/BQB 400 Packaging, marking and inspection documents
Q/BQB 401 Dimension, shape, weight and tolerances for continuously cold-rolled steel sheet and strip
Q/BQB 402 Continuously cold rolled carbon steel sheet and strip
Q/BQB 403 Continuously cold rolled low-carbon steel sheet and strip
Q/BQB 408 Continuously cold rolled steel sheet and strip for drawing
Q/BQB 411 Continuously cold rolled P-added high strength steel sheet and strip
Q/BQB 412 Continuously cold rolled high strength isotropic steel sheet and strip
Q/BQB 413 Continuously cold rolled high strength interstitial free steel sheet and strip
Q/BQB 415 Continuously cold rolled high strength martensitic steel sheet and strip
Q/BQB 416 Continuously cold rolled high strength bake hardening steel sheet and strip
Q/BQB 417 Continuously cold rolled high strength transformation induced plasticity steel sheet and strip
Q/BQB 418 Continuously cold rolled high strength dual phase steel sheet and strip
Q/BQB 419 Continuously cold rolled high strength low alloy steel sheet and strip
3 Terms and definitions
3.1 pure zinc coating (Z)
coating composed of pure zinc produced by electroplating in a continuously electrolytically line does not contain any trace elements harmful to binder bonding or coating properties
3.2 zinc-nickel alloy coating (ZN)
coating composed of zinc-nickel alloy produced by electroplating in a continuously electrolytically line; the mass fraction of nickel in the coating ranges from 8 to 15%, and other ingredient is zinc.
3.3 anti-finger chrome free (N5)
surface of steel sheet and strip is treated with chromium-free passivation and coated with anti-fingerprint film to improve the sweat stain resistance of the surface of electronic or electrical products
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and code
5 Required information to make an order
6 Dimension, shape, weight and permissible tolerance
7 Technical requirements
8 Inspection and testing
9 Packaging, marking and inspection documents
10 Rules for rounding off of numerical values
Annex A (Normative) Mass calculation method for theoretical weight
Additional explanation
