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The Pacific Islands present unique environmental challenges—from intense sunlight and humidity to salt-laden coastal winds. That’s why New Zealand Steel offers two trusted steel solutions specifically suited for Pacific conditions: Zincalume® and COLORBOND®.

Engineered for durability and tested across the region, these products are designed to perform in some of the harshest marine and tropical climates. Whether you're roofing, cladding, or building for the future, Zincalume® and COLORBOND® steel deliver long-lasting protection, low maintenance, and peace of mind.

New Zealand Steel introduced ZINCALUME®, zinc/aluminium alloy (AZ) coated steel in 1994 and it's been popular ever since for its durability. Now in 2025, building on that success, ZINCALUME® with Activate® Technology takes that durability a step further with the addition of Magnesium (AM) to the coating.

NZ STEEL: NEW CREDENTIALS ARE UNRIVALLED

We pride ourselves on being the market leader in steel based building solutions and the largest employer in the Franklin region. Our Commitment to innovation, from exporting iron ore to creating steel framed residential housing, underpins our desire to be New Zealand's premier steel building business.

In April and June 2021, NZ Steel lodged two applications with Auckland Council to replace existing site wide resource consents relating to activities at its Glenbrook integrated steel mill. These applications were for Discharges to Air and Discharges to Water.

The issue of new resource consents will provide for continuing operations of the NZ Steel business.

Our Environmental Team worked with environmental consultants to prepare two Assessment of Environmental Effects. One relating to the site…

New Zealand Steel Certificates & Memberships

The well known black sand beaches sweeping down the west coast of the North Island are the sites of New Zealand’s greatest known reserves of ironsand. Its potential for commercial use was recognised from the early days of European settlement. This black ironsand was formed 2.5 million years ago from rock deposited on the coast by volcanic activity in the Taranaki region. The sand contains mainly ironsand (titanomagnetite) and lime-soda feldspars. Over the centuries, the heavy dark ironsands have been transported by ocean currents along the coast and deposited on beaches, forming dunes of up to 90 metres high. After extensive trials, the New Zealand Steel Mill at Glenbrook opened in 1970 with an ironsand mine located at the mouth of the Waikato River.

New Zealand Steel is strengthening the future of steel making in New Zealand for the benefit of communities, industry and the economy.

Guided by a philosophy to produce safe, sustainable products, we are a leading manufacturer of quality steel. Our products are central to major markets including construction, manufacturing, infrastructure, packaging and agriculture.

New Zealand Steel produces a range of products for construction, infrastructure, rural and transport applications.

All products are manufactured under strict quality control conditions and are 100% New Zealand made.