From the heart of Hamilton, Latham Steel proudly stands as a leading manufacturer and supplier of high-grade materials, with our High Carbon Steel C55 Sheet and Plates representing a cornerstone of our offering. We understand that your projects demand unwavering strength and reliability, which is precisely what this robust steel delivers. Sourced and prepared with meticulous care, our C55 is engineered for those applications where ordinary steel simply won’t suffice, providing a trusted foundation for industry right here in New Zealand and beyond.
The C55 grade is defined by a carefully balanced composition, primarily iron with a carbon content around 0.55%, which is key to its performance. This composition results in impressive mechanical properties, including high tensile strength and excellent wear resistance. While it is a harder material, it can be heat-treated through processes like quenching and tempering to further enhance its hardness and durability, allowing it to withstand significant impact and abrasion without compromising its structural integrity over time.
| Specification | ASTM A830/ASME SA830 |
| Thickness | 2-600mm |
| Width | 4200-11000mm |
| Length | 3000-18000mm |
| Finish | Hot rolled plate (HR) |
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | Cr+Mo+Ni |
| C55 | 0.52-0.6 | 0.60-0.90 | ≤ 0.045 | ≤ 0.045 | ≤ 0.4 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 | ≤ 0.63 |
| Mechanical properties a at room temperature in the quenched and tempered condition (+QT) | |||
| Diameter d mm | ≤ 16 | 16-40 | 40-100 |
| Thickness t mm | < 8 | 8-20 | 20-60 |
| Yield Strength Mpa | ≥550 | ≥490 | ≥420 |
| Tensile Strength Mpa | 800-950 | 750-900 | 700-850 |
| Elongation, % | ≥12 | ≥14 | ≥15 |
| Reduction of area ,% | ≥30 | ≥45 | ≥40 |
| C55 EN 10083-2 Number:1.0535 | Comparision of steel grades | |
| JIS G 4051 | S 55 C | |
| DIN 17200 | C 55 | |
| NFA 33-101 | AF70-C 55 | |
| UNI 7846 | C 55 | |
| BS 970 | 070 M 55 | |
| UNE 36011 | C 55 k | |
| SAE J 403-AISI | 1055 | |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
The exceptional durability of C55 makes it the material of choice for a wide array of demanding tasks. You’ll often find it being used for heavy-duty springs, robust blades for agricultural machinery, and high-strength gears and shafts in industrial equipment. Its resistance to wear also sees it fashioned into durable tools, components for the railway industry, and parts that must endure constant friction. Essentially, wherever there’s a need for a component that can take a pounding and last, C55 sheet and plate step up to the challenge.
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.
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