Cold drawn seamless steel pipe is processed by cold drawing technology based on hot rolled seamless pipe. It features high dimensional accuracy, smooth inner and outer surface, tight tolerance, high hardness and good mechanical property. Widely used in machinery manufacturing, hydraulic cylinder, automobile parts, precision engineering and high-precision pipeline systems.
Cold drawn seamless steel pipe is a kind of high-precision seamless steel tube produced by cold drawing process on the basis of hot rolled seamless blank pipe. Through repeated cold drawing, annealing, straightening and precision sizing treatment, the internal metal structure of the steel pipe is more compact and uniform, with significantly improved mechanical properties, hardness and dimensional stability. Different from hot rolled seamless pipe, cold drawn seamless tube has higher dimensional precision, smoother inner and outer wall, smaller outer diameter and thinner wall tolerance, no oxide skin on the surface, and can be used directly without further polishing or machining.
We adopt multiple standard material grades including 10#, 20#, 45#, Q345B, 20Cr, 40Cr for selection. Each raw material strictly complies with GB/T8162, GB/T8163, ASTM A106 and ASTM A53 standards. After professional processes such as pickling, lubrication, cold drawing, intermediate annealing, finishing and straightening, the finished pipe achieves high roundness, good straightness and uniform wall thickness. The surface is smooth and clean with no rust, no crack, no fold and no concave-convex defects.
The size range covers outer diameter from 6mm to 219mm, wall thickness from 1mm to 30mm, including small diameter, thin wall, medium wall and thick wall precision specifications. Standard lengths are 6m, 9m and 12m, and any fixed cutting length can be customized according to customer drawings and requirements. Pipe ends are plain end as standard, and can be processed with bevelled end and threaded end for installation and matching.
All cold drawn seamless pipes are strictly inspected by dimensional measurement, surface inspection, mechanical property test, hydraulic pressure test and ultrasonic non-destructive testing to ensure stable quality, qualified tensile strength, yield strength and elongation. It is widely used in machinery manufacturing, hydraulic system cylinder barrel, automobile mechanical parts, bearing steel pipe, precision equipment frame, high-pressure fluid pipeline, instrument pipeline, engineering machinery and mold accessories.
Our factory has complete cold drawn production lines and perfect quality control system, sufficient stock of conventional sizes and stable supply capacity. The pipes are bundled with steel strips and equipped with plastic end caps, adopting standard export packaging to avoid collision, deformation and rust during long-distance transportation. With stable precision quality, competitive factory price and on-time delivery, our cold drawn seamless steel pipes are well recognized by global buyers, machinery manufacturers and engineering supporting customers.
Product Features:
1. High dimensional accuracy, small tolerance, strict size control.
2. Smooth inner and outer surface, no oxide layer, bright and clean finish.
3. Compact metal structure, high hardness, good toughness and mechanical performance.
4. Seamless integral structure, high pressure resistance, no leakage risk.
5. Available in multiple materials: 10#,20#,45#,Q345B,20Cr,40Cr.
6. Wide size range: small diameter, thin wall and precision thick wall specifications.
7. Good roundness and straightness, easy for cutting, turning and machining.
8. No need for extra polishing, direct use for precision mechanical parts.
9. Strict quality inspection, passed hydraulic test and nondestructive testing.
10. Large inventory, customizable length and pipe end processing.
Frequently Asked Questions (FAQ):
Q: What is cold drawn seamless steel pipe?A: It is high-precision seamless pipe made by cold drawing process from hot rolled seamless blank, with high accuracy, smooth surface and better mechanical performance.
Q: What materials are available?A: Mainly 10#, 20#, 45#, Q345B, 20Cr and 40Cr carbon steel and alloy steel grades.
Q: What is the difference between cold drawn and hot rolled seamless pipe?A: Cold drawn pipe has higher precision, smoother surface and tighter tolerance; hot rolled pipe is for large diameter and general structural use.
Q: Can you customize size and cut to length?A: Yes, we support custom outer diameter, wall thickness and any fixed cutting length.
Q: What is your MOQ and delivery time?A: MOQ is 100 Ton, delivery time 7–15 days after deposit.
| Item |
Specification |
| Product Name |
Cold Drawn Seamless Steel Pipe |
| Material Grade |
10#, 20#, 45#, Q345B, 20Cr, 40Cr |
| Production Process |
Hot Rolled Blank → Pickling → Lubrication → Cold Drawing → Annealing → Finishing |
| Executive Standard |
GB/T8162, GB/T8163, ASTM A106, ASTM A53 |
| Outer Diameter |
6mm – 219mm |
| Wall Thickness |
1mm – 30mm |
| Standard Length |
6m / 9m / 12m, Customized Length Available |
| Pipe End |
Plain End, Bevelled End, Threaded End |
| MOQ |
100 Ton |
| Delivery Time |
7-15 Days |
| Surface Finish |
Cold Drawn Smooth Bright Surface |
