AS NZS 4680-2006 (2017) PDF

Full title and description

AS/NZS 4680:2006 (R2017) — Hot‑dip galvanised (zinc) coatings on fabricated ferrous articles. This joint Australia/New Zealand standard specifies requirements and test methods for hot‑dip zinc coatings applied to fabricated ferrous items including structural fabrications, assembled steel products, tubular fabrications, fabricated wire work, forgings, stampings, castings, nails and other small components; it covers both centrifuged and non‑centrifuged articles and sets out acceptance criteria and test procedures for coating mass/thickness, appearance and coverage.

Abstract

This Standard defines the specification and test methods for hot‑dip galvanizing of fabricated iron and steel articles to ensure adequate corrosion protection. It includes requirements for coating mass and thickness measurement, visual acceptance, applicability (centrifuged and non‑centrifuged items), purchaser/gallvanizer information and guidance on demonstrating compliance. Appendix material gives purchasing guidance and means of demonstrating conformity; after‑treatment is not covered and must be specified separately.

General information

• Status: Reconfirmed (R2017); subsequently superseded by a 2025 edition (AS/NZS 4680:2025).
• Publication date: 2006 (valid from 29 August 2006; reconfirmation notice 2017).
• Publisher: Standards Australia / Standards New Zealand (joint publication).
• ICS / categories: Primarily 25.220.40 (Metallic coatings); also relevant to metal/structural categories (e.g. metal structures / corrosion protection).
• Edition / version: AS/NZS 4680:2006 (first joint AS/NZS edition), reconfirmed 2017 (R2017).
• Number of pages: 23 pages (printed/PDF standard length for the 2006 edition).

Scope

Applies to hot‑dip zinc coatings on fabricated ferrous articles produced by dipping whole fabricated items into a zinc bath. Covers structural steelwork, fabricated reinforcements, assembled products, tubular fabrications, fabricated wire work, forgings, stampings, castings, nails and similar small components; both centrifuged and non‑centrifuged articles are included. Excludes continuously galvanised sheet, strip and tube produced on dedicated continuous lines, and some wire and welded wire fabric (which are covered by other standards). The Standard provides purchaser information and methods to demonstrate compliance but does not cover after‑treatments or overcoatings.

Key topics and requirements

• Definitions and terminology for hot‑dip galvanizing of fabricated items.
• Requirements for coating mass and average thickness, with measurement and conversion methods.
• Acceptance criteria for visual appearance and coverage (including treatment of welded, recessed or threaded areas).
• Test methods: gravimetric/dissolution thickness measurement, magnetic/eddy current thickness methods, hydrogen evolution and site dry film thickness tests.
• Purchasing information/purchaser‑galvanizer communication guidelines (appendix guidance).
• Provisions for centrifuged vs non‑centrifuged articles and special cases (castings, forgings, small components).
• Notes on exclusions (continuous galvanizing lines, sheet/strip and specific wire products) and need for separate after‑treatment specifications where required.

Typical use and users

Specified by design engineers, fabricators, galvanizing works, procurement officers and quality assurance personnel for structural steel, building components, fencing, street furniture, fasteners and other fabricated ferrous articles where long‑term corrosion resistance is required. Also used by building regulators and product certifiers to reference acceptable coating performance and test methods.

Related standards

Commonly used alongside AS/NZS 2312 (guide to protection of structural steel by protective coatings, including hot‑dip galvanizing guidance), ISO/EN standards for hot‑dip galvanizing (for example ISO 1461 / EN ISO 1461) and test‑method standards for coating thickness and metallic coatings (various AS/ISO/EN methods referenced in the Standard). Newer local edition AS/NZS 4680:2025 replaces the 2006 edition for current normative references.

Keywords

hot‑dip galvanizing, zinc coating, metallic coatings, fabricated ferrous articles, coating mass, coating thickness, centrifuged articles, galvanizer, AS/NZS 4680, corrosion protection

FAQ

Q: What is this standard?

A: A joint Australia/New Zealand Standard that specifies requirements and test methods for hot‑dip zinc coatings applied to fabricated ferrous articles (AS/NZS 4680:2006, reconfirmed 2017 as R2017).

Q: What does it cover?

A: Coating specifications and test methods for hot‑dip galvanizing of fabricated iron and steel articles (structural fabrications, assemblies, tubular items, forgings, stampings, castings, nails and similar items), including measurement of coating mass/thickness, acceptance criteria and purchaser information; it excludes continuously galvanised sheet/strip and some wire products which are covered by other standards.

Q: Who typically uses it?

A: Design engineers, fabricators, galvanizing works, procurement and QA personnel, specifiers and building regulators who need standardized requirements for hot‑dip galvanizing of fabricated ferrous components.

Q: Is it current or superseded?

A: The 2006 edition was reconfirmed in 2017 (R2017). It has since been superseded by a later edition published in 2025 (AS/NZS 4680:2025); users should reference the 2025 edition for the latest normative requirements unless a project specifically calls for the 2006 edition.

Q: Is it part of a series?

A: It is part of the family of corrosion‑protection and metal‑coating standards used in Australia and New Zealand (commonly referenced with AS/NZS 2312 guidance on protective coatings and various AS/ISO test methods for metallic coatings and thickness measurement).

Q: What are the key keywords?

A: hot‑dip galvanizing; zinc coating; fabricated ferrous articles; coating thickness; coating mass; centrifuged; AS/NZS 4680; corrosion protection.