For over a decade, Latham Steel, right here in Hamilton, has been a trusted partner for New Zealand’s construction and engineering sectors, providing top-tier materials for projects built to last. We are proud specialists in supplying ASTM A588 GR.AB Corten steel, a material celebrated for its incredible durability and distinctive, protective weathered finish. We understand that sourcing the right steel is the foundation of a successful project, and we are committed to delivering the quality and reliability our local industries depend on, from large-scale infrastructure to unique architectural designs.
This particular steel is a marvel of modern metallurgy, defined by its specific composition and performance. Its blend of elements like copper, chromium, and nickel gives it a key advantage: when exposed to the elements, it forms a tight, self-healing patina of rust that actually protects the core material from further corrosion. This results in an exceptionally long service life with minimal maintenance, making it up to four times stronger than standard carbon steel in corrosive atmospheres, perfectly suited for New Zealand’s varied coastal and industrial environments.
| Specifications | ASME SA588 / ASTM A588 |
| Grade | Gr A / Gr B Corten Steel Plates |
| Thickness | from 0.8 mm to 50mm |
| Width | from 750mm to 1500mm |
| Length | up to 12,000mm |
| Type | Weathering Steel / Weather Resistant / Corten Steel |
| Process | Hot-Rolled (HR) |
| Applications | concrete industry, metallurgy, fan industry, coal industry, mining machinery, construction machinery, etc. |
| Grade | C % | Si % | Mn % | P % | S % | Cr % | V % | Ni % | Cu % |
| Grade A | 0.19 | 0.30-0.65 | 0.80-1.25 | 0.04 | 0.05 | 0.40-0.65 | 0.02-0.10 | 0.40 | 0.25-0.5 |
| Grade B | ≤0.20 | 0.15-0.50 | 0.75-1.35 | 0.040 | 0.050 | 0.40-0.70 | 0.01-0.10 | ≤0.50 | ≤0.50 |
| Grade | Thickness | Yield Strength ReH[N/mm2]transv.min | TensileStrength Rm[N/mm2]transv |
| ASTM A588 | 0mm-100mm | 340 MPa | 480 MPa |
| 102mm-127mm | 320 MPa | 460 MPa | |
| 127mm-203mm | 290 MPa | 430 MPa |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| THICKNESS | WIDTH | LENGTH | |
| A588 Steel | 3/16″ – 8″ | 48″ – 120″ | Up to 480″ |
| Width | Length | (lbs/ft) Weight |
| 48.00″ | 120.00″ | 15.0315 |
| 60.00″ | 120.00″ | 10.0210 |
| 48.00″ | 120.00″ | 20.0420 |
| 48.00″ | 120.00″ | 10.0210 |
You’ll find our Corten steel sheets and plates bringing both strength and character to a huge range of applications across the country. Its natural, rustic appearance makes it a favorite for architectural cladding, bridges, and sculptural elements that gracefully age with the landscape. Beyond its good looks, its robust nature is essential for vital infrastructure like transmission towers, heavy-duty structural frames, and large-scale container manufacturing. It’s the go-to choice where longevity and a reduced need for painting or upkeep are critical, saving time and resources over the life of a project.
Latham Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hamilton, New Zealand.
Copyright 2025 Latham Steel. All rights reserved
