Located in the industrial heart of Hamilton, Latham Steel is your trusted, local source for premium pressure vessel quality steel. We specialise in supplying robust ASTM A204 Grade B sheets and plates, providing New Zealand’s manufacturing and engineering sectors with materials known for their unwavering reliability. Our team understands the critical nature of your projects, which is why we are committed to delivering not just product, but a partnership built on expertise and dependable service right here in the Waikato.
The strength of ASTM A204 Grade B lies in its carefully balanced composition, primarily molybdenum steel, which gives it excellent performance in elevated temperature service. This specific grade is defined by its minimum tensile strength of 515 MPa and a yield strength of 310 MPa, ensuring it can handle significant internal pressures and structural loads. This combination of chemistry and mechanical properties makes it a go-to material for applications where heat and pressure are constant challenges.
Standard:Â ASTM A204/ ASME SA204
Steel Grade:Â Grade B
Thickness:Â 6mm to 150mm
Length:Â 3000mm to 15000mm
Width:Â 1500mm to 4050mm
Delivery state:Â Hot Rolled
Surface: Mill Varnish, Oiled,Galvanized, Bare
Application:Â steel boiler plates, high temperature pressure vessel plates
| Grade | Chemical Composition(%) | ||||
| P | Mn≥ | C | Si | S | |
| ASTM A204 Grade B(A204GRB) | 0.035 | 0.98 | 0.20 | 0.13-0.45 | 0.035 |
| Mechanical Property | A204 Grade B |
|---|---|
| [MPa] Tensile strength, kis | 70-90 [485-620] |
| min, % Elongation in 2 in. [50 mm] | 21 |
| [MPa] Yield strength, min, kis | 40 [275] |
| min, % Elongation in 8 in. [200 mm] | 17 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
You’ll find ASTM A204 Grade B plates hard at work in some of industry’s most demanding environments. They are the fundamental building blocks for critical equipment like boilers, pressure vessels, and heat exchangers, particularly in power generation and petrochemical plants. Their ability to maintain integrity under stress and high temperatures also makes them suitable for large-scale storage tanks and other fabricated components where safety and long-term durability are absolutely non-negotiable.
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
