A chapter-by-chapter guide to the Australian and New Zealand standards that govern our coated wire and our finished fence products — AS/NZS 4534 and AS 2423.
YIELD MAX products sit at the intersection of two complementary Australian Standards. AS/NZS 4534 governs the protective coating on the steel wire we use; AS 2423 governs the finished fence products made from that wire. Both are referenced together by Australian and New Zealand buyers as the benchmark for imported rural fencing.
Think of it as a chain — from raw wire, through coating, to the rolled fence on the truck. Each link has its own standard.
Low-carbon or high-tensile steel wire is drawn to the required diameter and mechanical properties.
Wire is coated with zinc (Z) or zinc/10%-aluminium alloy (ZA) to the class and coating mass set by AS/NZS 4534.
The coated wire is woven, knotted or welded into the finished fencing product — geometry, joint integrity and roll specs to AS 2423.
Specifies the protective metallic coating applied to steel wire. Defines coating types (Z, ZA), coating classes, minimum coating mass per square metre, adhesion, and uniformity test methods. Adopted jointly across Australia and New Zealand.
Covers the finished fencing products made from coated wire. Defines product categories, fence types (fixed knot, hinge joint, prefabricated mesh), geometric requirements, mechanical performance, and roll-form specifications.
AS 2423 references AS/NZS 4534 for the coating on its constituent wire. A fence claiming AS 2423 compliance must be built from wire that is coated to AS/NZS 4534. The two standards together describe the complete product — wire, coating, and finished mesh.
New Zealand jointly adopts the coatings standard as AS/NZS 4534. AS 2423 and AS/NZS 4534 are routinely cited by NZ rural fencing wholesalers, distributors and farm consultants when assessing imported fixed knot fence.
AS/NZS 4534 specifies the requirements for metallic coatings applied to steel wire. It governs both pure zinc (Z) coatings — commonly called Hot-Dip Galvanized or HDG — and zinc-aluminium alloy (ZA) coatings, including the 10%-aluminium variant we supply. Together these cover virtually all wire used in Australian and New Zealand rural fencing.
| Parameter | Requirement (AS/NZS 4534) | YIELD MAX |
|---|---|---|
| Coating types | Z (zinc) and ZA (zinc/10%-aluminium alloy) | Both offered ✓ |
| Coating classes | Class A and Class B (and equivalent ZA grades) — heavier coating = longer life | Class A & B available ✓ |
| Minimum coating mass (Z, Class A) | g/m² per Table — varies with wire diameter | Compliant ✓ |
| Minimum coating mass (Z, Class B) | Heavier than Class A — for harsher environments | Compliant ✓ |
| ZA alloy minimum coating mass | Per the relevant ZA class table | Compliant ✓ |
| Adhesion | Coating must not flake or crack on bending to a defined mandrel | Passes ✓ |
| Uniformity (Z coatings) | Preece test — coating must withstand a specified number of dips in copper sulfate solution | Passes ✓ |
The coating is what stops the wire from rusting in the field. Two fences that look identical at delivery can have very different service lives depending on coating mass and coating type. Light coating + coastal environment = visible rust in 2–3 years. Heavier coating, or a switch to Zn/Al alloy, can extend useful life by 2–3 times. AS/NZS 4534 exists so buyers can specify what they're paying for, and prove it after delivery.
Both coating options are AS/NZS 4534 compliant. The right choice depends on the corrosion category of the installation site.
| Site environment | Recommended coating | Reason |
|---|---|---|
| Inland / dry pastoral (AS 4534 Cat. B) | HDG (Class A or B) | Standard zinc protection is sufficient |
| High rainfall / humid (Cat. C) | Zn-Al preferred | Better long-term resistance to wet/dry cycles |
| Coastal — within 1 km of sea (Cat. D / E) | Zn-Al strongly recommended | Salt aerosol accelerates pure-zinc corrosion sharply |
| Near industrial / agricultural chemicals | Zn-Al recommended | SO₂, fertilisers and effluent degrade pure zinc faster than alloy |
| New Zealand — general rural | Zn-Al preferred | Higher rainfall and humidity than most of inland Australia |
For a full visual breakdown of Australia's six corrosion zones and the coatings best suited to each, see our news article Australia Corrosion Zones — Wire Coating Guide.
AS 2423 covers the finished fencing products built from coated steel wire. It sets the rules for the product as a whole — what category it falls into, how the wires are joined, the geometry of the mesh, mechanical performance, and how it ships.
AS 2423 is written broadly to cover terrestrial, aquatic, and general-use coated wire fencing products. The standard treats different product types under different sub-categories, but the core compliance rules — coating to AS/NZS 4534, mechanical performance, joint integrity, accurate roll geometry — apply across all of them.
Fixed knot fence, hinge joint fence, prefabricated rural mesh, predator and stock netting. This is where YIELD MAX's main product range sits.
Aquaculture netting and water-edge fencing. Coating choice is critical — AS/NZS 4534 ZA coatings are typically specified for these applications.
General-purpose mesh and netting that doesn't fall cleanly into terrestrial or aquatic — covered by the standard's general clauses.
Whatever the product category, AS 2423 requires that the constituent wire be coated in accordance with AS/NZS 4534. The two standards are designed to be read together.
| Parameter | Requirement (AS 2423) | YIELD MAX |
|---|---|---|
| Wire coating | To AS/NZS 4534 — Z or ZA, class as nominated | Available across Z and ZA grades ✓ |
| Wire breaking force | Per wire diameter and grade table | Tested per coil ✓ |
| Joint type | Fixed knot, hinge joint, or welded — declared at order | Fixed knot (locked, no slip) ✓ |
| Mesh geometry | Line wire and stay wire spacing per nominated design | Standard & custom designs ✓ |
| Height | Per nominated design, within tolerance | Multiple heights available ✓ |
| Roll length | Per order, within ±tolerance | Standard 100 m, custom on request ✓ |
| Marking / identification | Coil or roll identifiable to batch | Roll-level traceability ✓ |
In a fixed-knot fence each intersection of line wire and stay wire is locked by a separate knot wire that wraps around both, preventing slip. Compared with hinge-joint fences — where vertical stays can pivot — fixed-knot construction keeps mesh geometry stable under livestock pressure and on uneven terrain. AS 2423 recognises both joint types as distinct sub-categories with their own performance criteria.
Here's how the YIELD MAX product range maps to AS 2423's terrestrial-fencing scope. Coating in every case is to AS/NZS 4534.
Pure zinc (Z) coating to AS/NZS 4534 Class A or B. Standard rural application — pastoral livestock containment, property boundary, paddock division. Long, proven service life inland.
Zinc/10%-aluminium (ZA) alloy coating to AS/NZS 4534. Same fixed-knot geometry, dramatically longer life in coastal, humid or chemically aggressive environments. Recommended for NZ and coastal AU.
Custom heights, line-wire counts, stay spacings, wire gauges, and roll lengths. Built to the same AS 2423 fixed-knot construction rules, configured to the project's brief.
Compliance is only meaningful when it can be proven. The following documents are available for every YIELD MAX order — together they cover both the coating standard (AS/NZS 4534) and the product standard (AS 2423).
Confirms the coating type (Z or ZA), class, and minimum coating mass per square metre measured on representative samples from the batch. Verifies AS/NZS 4534 compliance.
Records the mandrel-bend adhesion test and (for Z coatings) the Preece copper-sulfate uniformity test — the two core acceptance tests under AS/NZS 4534.
Written declaration that the fence product meets AS 2423 for nominated height, line wire spacing, stay spacing, joint type (fixed knot), wire diameter, and roll length.
Manufacturer's certificate for the underlying steel wire — grade, tensile strength, elongation, chemistry — traceable to the coil supplied to our mesh-forming line.
We welcome pre-shipment inspection by SGS, Bureau Veritas, Intertek or your nominated agency. Coating mass, geometry, and joint pull-out testing can be arranged at origin.
We can ship a short physical sample of the product (typically 30–50 cm) for tactile inspection of coating, knot type and wire gauge before the first full order is placed.
As our product range expands and as buyer questions accumulate, we'll add chapters here covering further relevant standards.
Wire-grade standards (low-carbon vs high-tensile), packaging and dispatch standards, country-specific quarantine and treatment requirements (especially for export to New Zealand), and any additional joint-strength or pull-out test references. Tell us what would help and we'll prioritise it.
Request documentation, discuss a specification, or arrange third-party testing — we're happy to help.
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