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Hight-quality Carbon Steel Structural C45 Mild Steel Cold-drawn Special-shaped Steel Non-standard Steel
Our high-quality C45 mild steel products cover cold-drawn special-shaped & non-standard steel. With excellent strength and machinability, they serve as reliable structural materials for machinery and equipment.
- Overview
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In the precision-driven world of industrial manufacturing, the demand for structural steel that balances high strength, excellent processability, and customized adaptability has never been greater. Our High-quality Carbon Steel Structural C45 Mild Steel Cold-drawn Special-shaped Steel & Non-standard Steel perfectly meets this demand, combining the inherent superiority of C45 mild steel with the precision of cold-drawing technology. C45 mild steel, a classic medium-carbon structural steel, is renowned for its balanced mechanical properties, making it a staple in scenarios requiring both load-bearing capacity and machinability. When processed into special-shaped and non-standard profiles through cold-drawing, it transcends the limitations of standard steel products, becoming a core material for high-performance components in machinery manufacturing, automotive engineering, and precision hardware industries. Whether it’s a complex irregular profile for a gearbox or a non-standard size for a construction machinery part, our C45 cold-drawn steel delivers consistent quality and reliable performance.
The foundation of our product’s excellence lies in the superior properties of C45 mild steel, a material widely recognized for its versatility and reliability. C45 mild steel typically has a carbon content ranging from 0.42% to 0.50%, a manganese content of 0.50% to 0.80%, and trace amounts of silicon, phosphorus, and sulfur—chemical composition that gives it a perfect balance of strength and ductility. Compared to low-carbon steels like Q235, C45 offers significantly higher tensile strength (490-640MPa) and yield strength (≥295MPa), making it suitable for structural components that bear medium to heavy loads. Unlike high-carbon steels that are brittle and difficult to machine, C45 retains good machinability, allowing for precise turning, milling, drilling, and grinding operations. This balanced performance makes it an ideal choice for components that require both structural rigidity and complex processing, such as shafts, gears, bolts, and connecting rods. We source C45 steel billets exclusively from certified suppliers, ensuring that each batch meets the chemical composition and mechanical property requirements of GB/T 700-2006 and ASTM A108 standards, laying a solid foundation for high-quality end products.
The precision cold-drawing process further elevates the performance of C45 mild steel, creating special-shaped and non-standard profiles with exceptional quality. Cold-drawing, a cold-working technique that pulls steel billets through custom dies at room temperature, differs fundamentally from hot-rolling in its ability to refine the material’s structure and control dimensions. Our production process for C45 cold-drawn steel follows a rigorous workflow: first, the C45 steel billets undergo annealing treatment to soften the material, reduce internal stress, and improve plasticity—critical for preventing cracking during the cold-drawing of complex special-shaped profiles. Next, the billets are pickled and phosphatized to remove surface oxide scale and form a lubricating film, ensuring smooth contact with the die and protecting the surface quality of the finished product. The core cold-drawing stage uses numerically controlled drawing machines with precise tension control, which can adjust the drawing speed and force in real time according to the profile’s complexity. For special-shaped profiles (such as T-shaped, U-shaped, or irregular composite profiles), we adopt multi-pass progressive cold drawing, gradually shaping the billet to avoid excessive stress concentration. This process not only achieves tight dimensional tolerances (key dimensions controlled within ±0.03mm) but also refines the grain structure of C45 steel, increasing its tensile strength by 20%-30% and improving surface hardness to HB 180-220, further enhancing wear resistance.
Our customization capabilities for special-shaped and non-standard C45 steel set us apart in the market, enabling us to meet the unique needs of diverse industries. Unlike standard steel products with fixed specifications, we start each customization project with in-depth communication with customers to understand the application scenario, load requirements, and processing needs of the component. For example, a heavy machinery manufacturer required a non-standard C45 cold-drawn steel shaft with a stepped special-shaped cross-section (combining cylindrical and rectangular structures) to fit a new type of reducer. We not only customized the cross-sectional shape and size but also adjusted the cold-drawing process to ensure uniform hardness across the stepped transition area, preventing stress concentration. In the automotive industry, a transmission system supplier needed a U-shaped C45 cold-drawn special-shaped steel with a 15mm inner arc radius for a gear bracket; we optimized the die design to ensure the arc’s smoothness and dimensional accuracy, and conducted heat treatment after cold-drawing to further improve the material’s fatigue resistance. Our customization scope covers all aspects: cross-sectional shape (from simple regular profiles to complex irregular ones), size specifications (thickness, width, length, etc.), mechanical properties (tensile strength, hardness, etc.), and surface treatments (galvanizing, phosphatizing, oiling, etc.). This "one-stop" customization service ensures that each product is perfectly matched to the customer’s application, avoiding the need for secondary processing and reducing production costs.
The wide application scenarios of our high-quality C45 cold-drawn special-shaped and non-standard steel fully demonstrate its versatility and practical value. In the machinery manufacturing industry, it is the preferred material for producing core components such as shafts, gears, bearings, and connecting rods. For example, the C45 cold-drawn special-shaped steel used in a CNC machine tool’s lead screw has precise dimensional accuracy and high surface hardness, ensuring smooth transmission and long service life. In the automotive industry, it is applied to transmission system components, suspension brackets, and brake system parts—its high strength and good fatigue resistance ensure the safety and reliability of the vehicle. A car manufacturer’s test shows that the C45 cold-drawn non-standard steel we supplied for transmission gears has a service life 25% longer than that of hot-rolled steel gears. In the construction machinery industry, our C45 special-shaped steel is used in loader booms, excavator bucket teeth, and crane structural parts, withstanding the harsh working environment of heavy loads and frequent impacts. In the precision hardware industry, it is processed into high-strength bolts, nuts, and dies, where its good machinability and stable performance ensure the precision of the hardware products. Even in the aerospace auxiliary equipment industry, our C45 cold-drawn non-standard steel is used in ground support equipment components, meeting the strict requirements for structural stability.
A strict quality control system is the guarantee for the stable performance of our C45 cold-drawn steel products. We have established a full-process quality monitoring mechanism from raw material incoming inspection to finished product delivery, and have obtained ISO 9001 quality management system certification. In the raw material stage, we conduct spectral analysis on C45 steel billets to verify their chemical composition, ensuring that the carbon content and alloy elements meet the standard requirements; tensile and impact tests are also performed to confirm mechanical properties. During the cold-drawing process, we set up multiple inspection points: after each drawing pass, a 3D coordinate measuring machine is used to detect the cross-sectional dimensions and shape tolerance of the semi-finished product, and a surface roughness meter is used to check the surface quality. After the finished product is formed, comprehensive performance testing is carried out, including hardness testing (using Brinell hardness tester), tensile strength testing, and metallographic analysis to check the grain structure. For products used in high-risk fields, non-destructive testing methods such as ultrasonic testing and magnetic particle inspection are adopted to detect internal defects. Each batch of products is accompanied by a detailed quality inspection report, which records the batch number, test data, and compliance with standards, providing customers with complete quality traceability.
In addition to product quality, we also focus on providing professional and efficient customer services to build long-term cooperative relationships. Our service team is composed of technical consultants with rich experience in the steel industry, who can provide one-on-one pre-sales consultation for customers: according to the customer’s application scenario, we recommend the most suitable C45 steel specifications and cold-drawing process, and even help optimize the component design to improve performance and reduce costs. During the production process, we use an intelligent production management system to track the production progress of each order in real time, and provide weekly or daily progress feedback to customers according to their needs. For urgent orders, we can adjust the production plan and open a green channel to ensure timely delivery—we once completed a 50-ton non-standard C45 cold-drawn special-shaped steel order in 15 days for an emergency maintenance project of a power plant, winning high praise from the customer. After-sales service is equally important: we send technicians to the customer’s production site to guide the processing and installation of the product, and collect feedback on product performance. If there are any quality problems, we will respond within 24 hours and provide a satisfactory solution, ensuring that the customer’s production is not affected.
In the context of the manufacturing industry moving towards high-endization and customization, our high-quality C45 mild steel cold-drawn special-shaped and non-standard steel represents the development trend of structural steel materials. By combining the excellent mechanical properties of C45 steel with the precision processing advantages of cold-drawing technology, we provide customers with high-performance, customized material solutions that help them improve the quality and competitiveness of their end products. Looking to the future, we will continue to increase investment in R&D, focusing on two key directions: on the one hand, we will explore the application of micro-alloying technology in C45 steel to further improve its strength and corrosion resistance; on the other hand, we will introduce more intelligent cold-drawing equipment to improve production efficiency and profile precision. We will also expand our international market layout, adhering to the quality standards of major international markets such as the European Union and the United States, and bringing our high-quality C45 cold-drawn steel products to the global market. Whether it’s a small-batch precision non-standard order or a large-scale special-shaped steel supply project, we will always adhere to the business philosophy of "quality first, customer-oriented", and provide professional, reliable, and efficient products and services to every customer. As a professional supplier of C45 cold-drawn special-shaped and non-standard steel, we are willing to grow together with the manufacturing industry and contribute to the development of high-end equipment manufacturing.
Jiangsu Beitong Cold-Drawn Section Steel Technology Co., Ltd
Established in Wu jiang, Suzhou in 2018, our company covers an area of 35 mu (approximately 23,333 square meters) and is a high-tech modern private enterprise.
Company Overview
The company has outstanding customization capabilities, providing cold-drawn section steel solutions for multiple fields. It boasts strong technical qualifications with over 10 patents and relevant certifications, and its product strength exceeds the industry average by 15%-20%. It serves more than 5,000 customers, including well-known enterprises.
Main products
• Cold-drawn round steel • Cold-drawn square steel • Cold-drawn flat steel • Cold-drawn hexagonal steel • Cold-drawn special-shaped steel
Personnel structure
The company comprises a Domestic Trade Department, a Foreign Trade Department, a Finance Department, and other units, with a sound organizational system.
The company has over 60 employees, including technical staff and R&D personnel.
• Cold-drawn hexagonal steel
Carbon steel, alloy steel, gear steel, free-cutting steel, spring steel
We can provide samples.
material
Q235、Q355B、20Cr、40Cr 20#、35#、45# 1215、12L14、1144
Product packaging
Manufacturing Technique
High-precision Production Guarantee:
Dual Support from Molds and Processes
Jiangsu Beitong Cold-Drawn Section Steel Technology Co., Ltd. has independently developed a mold design system. Combined with multi-pass progressive cold-drawing processes and real-time laser diameter measurement monitoring, it can ensure that the product dimensional accuracy error is within ±0.02mm and the surface roughness Ra is ≤1.6μm.
Adaptation to Differentiated Needs:
Flexible Process Adjustment
The company can flexibly adjust the annealing temperature and surface treatment processes to accurately meet customers' differentiated needs for product strength, corrosion resistance, etc., highlighting its outstanding advantages in customized production technology.
Materials |
Q235、Q355B、20Cr、40Cr、 20#、35#、45# 、1215、12L14、1144 |
width |
customization on demand |
length |
customization on demand |
MOQ |
2Tons |
The 3rd Advanced Technology Achievement Transformation Conference
Our company made a brilliant appearance, showcasing its technological strength and achievement matrix in the precision cold-drawn section steel field through rich display boards in its exclusive area.
• Custom - made steels and high - end sophisticated products covering the automotive, new energy, aerospace and other industries• Exploring transformation opportunities with partners from all sectors and facilitating industrial development
1.When can you make the samples?
Typically, it takes us 5 to 7 days to make the samples.
2.What is your minimum order quantity (MOQ)?
Cold-drawn steel profiles are usually divided into two types: less-than-truckload (LTL) and wholesale, with a minimum order quantity of 2 tons. The specific quantity is negotiable.
3.What is your delivery time?
For custom-made products with confirmed production schedules, we can arrange shipment within 30 days after receiving the advance deposit.
4.What are your shipping ports?
Shanghai Port.
5.What are your payment terms?
Usually, 30% of the total amount is paid as an advance deposit via Telegraphic Transfer (TT), and the balance is settled against the copy of the Bill of Lading (BL).
6.Where is your company located?
Jiangsu Province.
7.What are your main products? Cold-drawn round steel, cold-drawn square steel, cold-drawn flat steel, cold-drawn hexagonal steel, cold-drawn special-shaped steel Carbon steel: Q215, Q195, Q235, 20#, 35#, 45#, 55# Alloy steel/gear steel: Q355, 40Cr, 20CrMo, 35CrMo, 42CrMo, 20Cr, 20CrMoTi Free-cutting steel: 1215, 12L14, 1144 Bearing steel: GCr15 Spring steel: 60Si2Mn, 65Mn, etc. （24-Hour Feedback, 48-Hour Solution）
