Cold Drawn Round Bar

Cold Drawn Round Bar can be controlled within ±0.02mm, with straightness and out-of-roundness meeting stringent standards; standard accuracy can reach ±0.05mm. Surface roughness Ra≤1.6μm and is defect-free, requiring no additional surface treatment before surface finishing. Through cold work hardening, yield strength is increased by 30%-50%, and hardness and wear resistance are significantly enhanced.

Cold Drawn Round Bar’s Diameter specifications range from 3mm to 100mm, and lengths from 2m to 6m, with custom cutting up to 12m supported. Surface treatments include cold-drawn natural color, annealing, and phosphating; surface coatings can also be provided upon request to suit different processing scenarios.

Shunchun supports small-batch, multi-specification customization and provides pre-treatment services such as tempering and annealing. Equipped with material certificates and processing parameter guidance, one-on-one technical consultation response within ≤2 hours, and free return or exchange within 7 days for quality issues. Material utilization rate increased by 10%-20%, significantly reducing overall costs. 

Tianjin Shunchun Industrial's Cold Drawn Round Bars are high-precision circular cross-section steel products manufactured by cold drawing hot-rolled round steel. They feature a smooth, oxide-free surface, high dimensional accuracy, and superior mechanical properties, making them suitable for direct use in precision parts manufacturing or as finished materials for high-requirement components. They are widely used in precision manufacturing fields such as machinery, automotive, and electronics.

The core advantages of Shunchun's Cold Drawn Round Bars lie in their precision, quality, and efficiency. The products possess extremely high dimensional accuracy, with diameter tolerances controllable to ±0.02mm. Straightness and out-of-roundness meet stringent standards, satisfying precision assembly requirements. The surface quality is excellent, with a roughness Ra≤1.6μm and no defects, allowing for direct surface treatment. Through cold work hardening, the material's yield strength increases by 30%-50%, and its hardness and wear resistance are significantly enhanced. Simultaneously, the high-precision dimensions reduce machining allowances, increasing material utilization by 10%-20%. Furthermore, the company supports small-batch, multi-specification customization and provides pre-treatment services such as tempering and annealing to fully adapt to customers' personalized production needs.

Product Technical Specifications

Application areas and cases:

At a certain automotive parts manufacturing plant, Cold Drawn Round Bars are used to manufacture high-precision drive shafts. Using cold-drawn round bars simplifies the production process, significantly shortens the production cycle, and substantially improves the dimensional accuracy and surface quality of the parts, while reducing machining losses.

In a large-scale bridge construction project in a certain city, Cold Drawn Round Bars, as key materials for steel reinforcement and supporting structures, not only provided high-strength support, but also ensured high efficiency and stability during the construction process due to their precise dimensions and good welding performance.

After-sales service

Why choose us?

Shunchun's cold-drawn round bars are characterized by their precision performance, excellent machinability, and high stability. Shunchun products boast high dimensional accuracy (tolerances controllable within ±0.05mm), excellent surface finish, and a combination of high strength and good toughness, fully meeting the stringent requirements of precision components in the machinery, automotive, and energy industries. Through advanced cold-drawing processes and end-to-end quality control, Shunchun's materials exhibit excellent machinability and heat treatment responsiveness, with highly consistent batch performance, conforming to multiple standards such as GB/T and ASTM. Shunchun offers a wide range of specifications from φ3-120mm and provides customized services, supporting special tolerances, surface treatments, and flexible delivery, significantly improving customers' processing efficiency and material utilization. Choosing Shunchun means choosing a highly efficient material solution that is competitive in terms of precision, reliability, and overall cost.