Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of cold rolled steel tube in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable cold rolled steel tube from our factory.
Tianjin Brisk Steel is one of the manufacturers of cold drawn steel tube in China. Our cold rolled steel tubes are widely used in various industries, including automotive manufacturing, hydraulic and pneumatic systems, machinery structure, petrochemical, construction and aerospace, making them an ideal choice for high-precision and high-performance requirements. The cold rolling process enables the tubes to have a more uniform wall thickness and finer grain structure, further enhancing their overall performance.
PRODUCT
Tianjin BRISK STEEL focus on produce and supply hollow section and steel pipe
Production Process
- Raw Material & Pretreatment: Hot-rolled seamless tube blanks → cutting → pickling (remove oxide scale) → phosphating/saponification → lubrication (emulsion/oil to reduce friction).
- Cold Rolling Passes: Multi-roll reversible cold pilger mill compresses the tube at room temperature, reducing wall thickness/diameter with high reduction ratios (60–90%), strict control of ovality and straightness.
- Annealing: Bell-type/continuous furnace (850–950°C) to eliminate residual stress and work hardening, restore ductility (full anneal, bright anneal optional).
- Finishing: Precision straightening, cut-to-length, chamfering, non-destructive testing (eddy current/ultrasonic), rust-proof packaging.
Key Properties & Standards
| Feature | Specification |
| Surface Finish | Ra ≤ 0.8–1.6 μm, no scale, smooth, bright |
| Dimensional Tolerance |
OD tolerance ±0.05 mm, wall thickness ±0.1 mm (per DIN 2391, EN 10305-1, GB/T 3639, ASTM A519) |
| Mechanical Properties |
Higher yield/tensile strength (20%–30% above hot-rolled); annealed options balance strength and ductility |
| Common Grades | Carbon steel: 10#, 20#, ST52; Alloy steel: 4130, 4340 |
| International Standards |
DIN 2391 (Germany), EN 10305-1 (Europe), ASTM A519 (USA), JIS G3445 (Japan), GB/T 3639 (China, Cold-Drawn/Cold-Rolled Precision Seamless Steel Tubes) |
Applications & Advantages vs Disadvantages
Advantages vs Disadvantages
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Advantages: Tightest dimensional accuracy; excellent surface finish; enhanced strength and rigidity; no weld seam (seamless); good machinability.
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Disadvantages: Higher production cost than hot-rolled tubes; limited wall thickness range; residual stress requires annealing for critical applications; higher energy consumption in cold processing.
Cold Rolled vs Cold Drawn (Commonly Confused Terms)
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Cold Rolled (Cold Pilgering): Roller-based compression, high volume, better concentricity, ideal for medium-caliber precision tubes.
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Cold Drawn: Pulling through a die, more flexible for small batches/small diameters, but may have slightly higher residual stress.
Applications
- Exceptional Dimensional Precision: Strictly controlled outer diameter, inner diameter, and wall thickness tolerances, compliant with international standards (DIN2391, ASTM A179, EN 10305). This precision reduces machining time and improves overall production efficiency for your projects.
- Superior Surface Finish: Smooth inner and outer surfaces with no oxide layer, minimizing friction and wear. Ideal for applications requiring tight sealing and low resistance, such as hydraulic cylinders, fluid transmission pipelines, and precision machinery.
- Enhanced Mechanical Properties: Cold rolling hardening imparts higher tensile strength, yield strength, and hardness, along with excellent toughness and ductility. The finer grain structure ensures stable performance even in harsh industrial environments (petrochemical, aerospace, automotive).
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