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Help CenterCold Drawn Carbon Steel Rod 8mm 12mm 25mm Tight Tolerance H9 Precision Round Bar ISO Standard Compliance
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Hemaokang Steel (Shandong) Co., Ltd. proudly offers high-quality Cold Drawn Carbon Steel Rods in diameters of 8mm, 12mm, and 25mm, manufactured with tight H9 tolerance for precision engineering applications. As a professional steel manufacturer based in Liaocheng, Shandong, China, we combine advanced cold drawing technology with rigorous quality control to deliver round bars that meet international standards. Our rods are designed to provide excellent surface finish, consistent dimensional accuracy, and reliable mechanical properties, making them a trusted choice for machinery, automotive, and industrial equipment components.
Cold drawn carbon steel rods are produced through a precise drawing process that enhances the material's strength, hardness, and surface quality compared to hot-rolled alternatives. Our production line is equipped to handle strict tolerance requirements, and each rod is carefully inspected to ensure compliance with ISO standard specifications. Whether you need raw material for further machining or finished precision shafts, our rods offer the ideal balance of durability and machinability.
Below are the key features and benefits that set our cold drawn carbon steel rods apart:
- High dimensional accuracy: H9 tolerance ensures consistent diameter control, reducing the need for additional machining and saving production time.
- Smooth surface finish: The cold drawing process provides a clean, scale-free surface that improves wear resistance and reduces friction in moving parts.
- Improved mechanical properties: Cold working increases yield strength and hardness, making the rods suitable for demanding structural and mechanical applications.
- Wide range of sizes: Available in 8mm, 12mm, and 25mm diameters, with customizable lengths to meet specific production requirements.
- Material consistency: Each batch is sourced from high-grade carbon steel, ensuring uniform chemical composition and reliable performance.
- ISO compliant: Our manufacturing processes and quality management systems are aligned with ISO standards, and our facility is ISO9001 certified.
- Versatile application: Ideal for precision shafts, pins, bushings, hydraulic components, machine parts, and general engineering use.
Technical Specifications
| Parameter | Value |
|---|---|
| Diameter Options | 8mm, 12mm, 25mm |
| Tolerance Grade | H9 (tight tolerance) |
| Manufacturing Process | Cold drawn |
| Surface Condition | Bright, smooth, scale-free |
| Material Type | Carbon steel |
| Length | Custom (typical 3m-6m, other lengths available upon request) |
| Compliance | ISO standard; ISO9001 certified facility |
| Packaging | Bundled with protective wrapping, export standard |
Detailed Features and Benefits
Precision Engineered for Tight Tolerance: The H9 tolerance rating means your components will fit accurately every time. This reduces assembly issues and ensures that fabricated parts maintain their intended dimensions, especially critical for automation and precision machinery.
Superior Surface Quality: Unlike hot-rolled bars that often have scale or decarburization layers, our cold drawn rods have a bright, smooth surface. This directly translates to longer tool life during machining and better surface finish of final products. It also minimizes the risk of surface defects that could lead to premature failure.
Enhanced Strength and Hardness: Cold drawing refines the grain structure and increases tensile strength, making the rods more robust under load. The enhanced hardness also improves resistance to indentation and wear, extending service life even in abrasive environments.
Excellent Machinability: Despite the higher strength, our cold drawn carbon steel rods are optimized for machining operations such as turning, milling, drilling, and grinding. The uniform microstructure ensures predictable chip breaking and stable tool wear, boosting overall production efficiency.
Flexible Customization: We understand that different industries have unique requirements. Our rods can be supplied in multiple diameters (8mm, 12mm, 25mm) as well as custom lengths. We can also provide cut-to-size options, chamfering, threading, or straightening services upon request. This flexibility helps you streamline your supply chain.
Reliable Material Composition: We source carbon steel from verified mills and maintain traceability of each batch. Chemical composition is controlled to meet ISO and industry standards, ensuring consistent heat treatment response and mechanical properties across all shipments.
Logistics and Export Experience: Located in Shandong, close to Qingdao Port, we offer fast and efficient worldwide shipping. Our export value reaches USD 50-100 million annually, and we have established stable partnerships with clients across North America, South America, Europe, Southeast Asia, Africa, and other major markets.
Applications
These round bars are widely used in the following areas:
- Precision shafts and axles for motors, pumps, and gearboxes.
- Pins, dowels, and fasteners requiring tight tolerances.
- Hydraulic and pneumatic cylinder components.
- Machined parts for agricultural equipment, construction machinery, and industrial tools.
- Automotive components such as steering parts and transmission elements.
- General engineering applications where reliable round bar material is needed.
Company Strength and Commitment
Hemaokang Steel (Shandong) Co., Ltd. was established in 2025 but is already backed by a strong management team with deep experience in steel exporting. With annual exports of over US$50 million and a dedicated team of 51-100 employees, we operate with a customer-centric approach. Our factory follows a strict quality assurance system, and we have obtained ISO9001 certification, which reflects our commitment to continuous improvement and customer satisfaction.
We invite you to contact us for more details, quotations, or samples. Our professional sales team will respond within 24 hours, and we are committed to delivering products that meet your exact specifications. Choose Hemaokang Steel as your long-term partner for precision carbon steel rods and experience reliable quality, competitive pricing, and exceptional service.
Frequently Asked Questions (FAQ)
-
Q: What is the tolerance grade of your cold drawn rods?
A: Our standard tolerance is H9, which provides precise outer diameter control. Tighter tolerances (e.g., H7 or H6) are also available upon request. -
Q: Can you supply custom lengths?
A: Yes, we can cut rods to your specified lengths, typically ranging from 0.5m to 6m or longer. Please provide your exact requirements for a tailored offer. -
Q: Are these rods suitable for precision machining?
A: Absolutely. The cold drawn surface and tight dimensional accuracy make them ideal for CNC turning, grinding, and milling operations, reducing setup time and material waste. -
Q: Which carbon steel grades are used?
A: We offer various carbon steel grades such as 1045, 1214, 12L14, or others based on your application. Our team can help you select the most appropriate grade. -
Q: Do you provide certifications for your products?
A: Yes, we provide mill test certificates and our facility is ISO9001 certified. Specific third-party inspections are also supported as per your requirement. -
Q: What is the minimum order quantity?
A: The MOQ depends on the diameter and length. For standard sizes, it is typically 1 ton, but smaller trial orders are acceptable for first-time cooperation. -
Q: How do you ensure quality consistency?
A: We follow strict production controls, from raw material inspection to final dimensional and surface checks. Each production batch is documented and traceable. -
Q: What are your shipping terms?
A: We ship from Qingdao Port using FOB, CIF, CFR, or other terms as agreed. Sea freight, rail, and air transport options are available for domestic and international orders.
For further inquiries, please feel free to reach out via our website or email. Our team is ready to provide you with a competitive quotation and technical support. We look forward to building a successful partnership with you.
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