Phanuphong Steel and Plates, located in the vibrant city of Bangkok, Thailand, is a leading manufacturer and supplier that specializes in High Carbon Steel C55 sheets and plates. Known for their unwavering commitment to quality and precision, this company serves a variety of industrial sectors by offering durable and high-performance steel solutions. With cutting-edge manufacturing facilities and rigorous quality control measures, Phanuphong guarantees that every C55 sheet and plate adheres to international standards. Their ability to provide customized dimensions and finishes helps clients achieve the best results in mechanical, structural, and engineering applications. Whether locally or globally, Phanuphong Steel is recognized for its reliability and excellence.
High Carbon Steel C55 sheets and plates are primarily made up of 0.55% carbon, along with small amounts of manganese, silicon, and trace elements that boost strength and hardenability. This specific composition results in impressive tensile strength and excellent wear resistance, while still allowing for enough ductility for machining and forming. Typically, the mechanical properties include a tensile strength ranging from 800 to 1000 MPa and a hardness of 200–250 HB, making it perfect for applications that require high strength and durability. The higher carbon content also enables effective heat treatment, enhancing toughness and fatigue resistance in demanding conditions.
| 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.
These High Carbon Steel C55 sheets and plates are widely utilized in applications that require exceptional strength and wear resistance. They are particularly well-suited for manufacturing gears, shafts, axles, and springs, where durability under mechanical stress is essential. Additionally, C55 steel finds its place in tool-making, cutting instruments, and components for industrial machinery due to its ability to maintain hardness after heat treatment. Its strength and reliability also make it a great choice for automotive parts, construction equipment, and heavy-duty engineering structures. By blending strength, toughness, and machinability, C55 sheets and plates deliver long-lasting performance in high-demand environments.
Phanuphong 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 Bangkok, Thailand.
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