



Our high-performance S55C carbon structural steel round bars deliver exceptional durability and strength, engineered to meet diverse manufacturing requirements. Available in diameters from 25mm to 100mm and beyond, these premium round bars provide reliable precision for both standard and high-strength applications.
1)Grade: 20~55#, S55C, etc.
2)Packing: standard sea-worthy packing
3)Surface treatment: cutting, drilling, painting or as per customer’s requirement
4)Size: 20-160mm
Distinguished by its hot-rolled premium alloy construction, our S55C special steel round bar excels in strength, toughness, and wear resistance, outperforming ordinary steel solutions. Engineered for precision and reliability, it delivers superior surface finish and dimensional accuracy—even in the most demanding applications.
High strength and durability, excellent performance
Our S55C carbon structural steel round bars are essentially part of the Alloy Round Bars series. They are meticulously produced through hot rolling technology and possess high strength, high toughness, and excellent wear resistance. They can maintain stable mechanical properties under harsh working conditions. Their outstanding tensile strength and good processing performance can significantly enhance processing efficiency and reduce production energy consumption.
Stable quality, wide application
As an alloy round steel that has undergone strict quality control, the product features precise dimensions and a smooth surface, ensuring consistency and reliability in processing. Whether used in high-load structural components or precision mechanical parts, it provides durable material solutions at a high cost-performance ratio for various manufacturing projects, making it a high-quality choice that balances performance and economy.
Alloy steel round bar manufacturing specializes in producing alloy round bars, which possess excellent comprehensive mechanical properties and processing adaptability. They can be widely applied in the following fields:
General mechanical manufacturing: Suitable for processing various high-load fasteners, connecting pins, transmission shafts, piston rods and guide rails, etc., especially capable of meeting the requirements for precision in terms of wear resistance and dimensional stability for complex machine components.
Heavy Industry and Vehicle Sector: Due to its high strength and wear resistance properties, it can be widely applied in scenarios such as construction machinery, automotive chassis components, steering system shafts, and heavy-duty connecting parts. It still maintains reliable performance even under vibration and high-load conditions.
Infrastructure construction and industrial equipment: It performs exceptionally well in scenarios such as building steel structure connection components, industrial equipment guide rails, and transmission mechanisms. Its excellent machinability and uniform microstructure of hot-rolled alloy steel provide material support for long-term stable operation.
This alloy round steel demonstrates outstanding durability and economy in harsh industrial environments. It is an ideal material solution that achieves a balance between performance and cost through professional alloy steel manufacturing techniques.
As China metal materials industry leading enterprises, the national steel trade and logistics "Hundred good faith enterprise",China steel trade enterprises, "Top 100 private enterprises in Shanghai”. Shanghai Zhanzhi industry Group Co., Ltd.,(shorted to Zhanzhi Group) takes the" Integrity, Practicality, Innovation, Win-Win " as its sole operation principle, always persist in putting the customer demand in the first place.


