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Cold Drawn Tube

We focus on the research and production of the precision cold drawing tube. After years of practice, we have strong technical force and good team.

 

Your Professional Cold Drawn Tube Supplier

 

 

Our goal is to be your true partner in the cold drawn tube in China.Wuxi longwei precision tube co.,ltd. Is located in the scenic taihu lake, covering an area of 20 acres and, building area of 10, 000 square meters. The company's main products: Hydraulic and pneumatic cylinder with precision internal diameter seamless steel pipe, cylinder diameter40-500mm, textile machinery, glass machinery roller tubes, automotive drive shafts, motor shells, and other manufacturing fields.

 

Why Choose Us
 

Production Equipment
United talents, the introduction of advanced equipment, established a strict scientific management system,the company has a 9msrb scraping roller-ray machine, high precision hydraulic cold drawing machine, a honing machine, and other advanced production equipment and testing equipment.

 

High Quality
The whole production process and stringent corporate standards, the main quality control parameters are higher than the national standards and international standards,provide customers with quality products and services.

 

Professional Team
The company has a number of technically proven, rigorous styles, and good and innovative technical teams. They are experienced and skilled, covering all aspects from r&d to production.

 

Custom Service
The company can also tailor-made according to customer's needs. We pay tribute to friends to express enthusiasm: The willingness of the user to work together to create a better future.

Advantages of Cold Drawn Tube
27SiMn Precision Low Alloy Thin Wall Carbon Steel Tube
CK45 High-precision Cold Rolled Seamless Steel Tube
45# Large Caliber Thick Wall Seamless Pipe
Small Diameter Thin-walled Seamless Steel Tube

High dimensional accuracy and precision
Cold drawn pipes are known for their exceptional dimensional accuracy and precision. The cold drawing process, performed at room temperature, ensures tight tolerances and uniformity, which is critical in applications demanding exact specifications such as industrial machinery, automotive components, and precision engineering. This precision reduces the need for additional machining, saving both time and resources.

 

Superior surface finish
One major advantage of cold drawn pipes is their excellent surface finish. During the process, the material is pulled through a die that polishes the surface and removes imperfections. A smoother surface is crucial for both aesthetic reasons and to prevent defects, especially in visible applications or where performance depends on a smooth finish.

 

Enhanced mechanical properties
Cold drawn pipes have superior mechanical properties compared to hot-rolled and cold-rolled pipes. The cold drawing process increases the yield and tensile strength, making the pipes more durable and capable of withstanding higher stresses. This process also enhances the toughness and ductility of the material, allowing it to absorb more energy before breaking and extending the lifespan of the pipes.

 

Improved formability and ductility
The cold drawing process significantly enhances the formability and ductility of the material. This means cold drawn pipes can be bent and formed into complex shapes without losing their structural integrity. This is particularly useful in industries where pipes need specific configurations, such as hydraulic systems, automotive exhausts, and machinery components.

 

Types of Cold Drawn Tube

 
 

Small diameter thin-walled seamless steel tube
Thin-walled seamless steel tube classification: The thin—walled seamless steel tube is made of steel ingot or solid tube billet through perforation. Then it is made by hot rolling, cold rolling or cold. Seamless steel pipe is divided into hot rolling and cold rolling (dial) seamless steel tube.

 
 

304 /316 small diameter seamless pipe
The s small diameter tubing refers to the steel pipe with the outer diameter of the seamless steel tube with a diameter of 299mm, the diameter of the outer diameter and the thickness of the wall is less than 20, the minimum mouth is 3mm, the thickness of the wall is as low as 1mm.

 
 

27simn thick wall cold drawn seamless tube
27simn thick wall cold drawn seamless tube is a high-quality product manufactured by our company in China. This product is an essential component for various industries such as construction, automotive, and machinery industries.

 
 

Ck20 precision cold drawn seamless steel tubes
Our ck20 precision cold drawn seamless steel tubes are available in different sizes, ranging from 6mm to 168mm od and 1mm to 15mm thickness. The tubes conform to astm, din, en, and jis standards.

 
 

16mn 25mn 37mn precision cold drawn seamless steel pipe
Our seamless steel pipe is made of high-quality materials, including 16mn, 25mn, and 37mn. These materials possess excellent mechanical properties, including high strength, durability, and resistance to corrosion.

 

 

Steel Grade and Chemical Compositions

 

 

Grade

C max

Si max

Mn

P max

S max

ST35

0.17

0.35

≥0.40

0.025

0.025

ST45

0.21

0.35

≥0.40

0.025

0.025

ST52

0.22

0.35

≥1.60

0.025

0.025

 

Mechanical Properties

 

 

Grade

Condition

Tensile Point (Mpa)

Yield Point (Mpa)

Elongation

ST35

BK

≥ 440

  

≥ 6%
 

BKW

≥ 370

  

≥ 10%
 

GBK

≥ 315

  

≥ 25%
 

NBK

340-470

235

≥ 25%

ST45

BK

≥ 540

  

≥ 5%
 

BKW

≥ 470

  

≥ 8%
 

GBK

≥ 390

  

≥ 21%
 

NBK

440-570

255

≥ 21%

ST52

BK

≥ 590

  

≥ 5%
 

BKW

≥ 540

  

≥ 7%
 

GBK

≥490

  

≥ 22%
 

NBK

490-630

355

≥ 22%

 

Process of Cold Drawn Tube

Preparation of the material

The raw material, typically a hot-rolled tube or bar, is cleaned and pickled to remove surface scale and impurities. This ensures the material is free from contaminants that could affect the drawing process.

 

Lubrication

After cleaning, the material is coated with a lubricant to minimize friction as it moves through the die. This lubricant can be soap, oil, or a specialized drawing compound, facilitating smoother movement through the die.

 

Drawing

Next, the lubricated material is pulled through one or more dies. The die is a hard, precision-engineered tool that determines the final dimensions of the drawn product. The drawing process can involve a single die or multiple dies in sequence, depending on the desired size reduction and shape complexity.

Intermediate annealing

For significant size reduction, the material May undergo intermediate annealing between drawing passes. Annealing, which involves heating and then slowly cooling the material, relieves internal stresses and restores flexibility, preventing cracking during further drawing.

Final drawing pass

After annealing, the material is drawn one last time to achieve precise dimensions and a smooth finish. This step ensures tight tolerances and enhances the overall quality of the product.

Finishing operations

After drawing, the material is straightened, cut to length, and inspected to ensure it meets specifications. These operations finalize the product, making it ready for its intended application.

 

Other Services
 

Delivery time
If one container 15-20 days. We also stock some standard-sized tubes and rods, if you need 3-5 pcs, we can delivery soon.

 

Safe packing
Anti-rust oil be spread on tubes and rods before shipping, plastic caps on tube ends to protect inside surface, each rod be protected with cardboard tube. Finally be packed with seaworthy package or in wooden case. Mooth no-defect surface.

 

Send samples
Our product is steel pipe, we can send you samples and catalog, warmly welcome you to come visit our company.

 

FAQ

 

Q: What is cold drawn tubing?

A: Manufactured by drawing a solid metal billet through a piercing rod to create a hollow tube without any seams or welds. This seamless construction sets them apart from other types of tubes, such as welded or hot-rolled tubes.

Q: Is cold drawn the same as cold-rolled?

A: The drawing process aligns the steel grains, improving their strength and ductility. Cold-drawn steel also has a higher yield strength than cold-rolled steel, which makes it more suitable for applications that require high strength and toughness.

Q: What is the difference between hot rolled and cold drawn pipe?

A: The knowledge of both processes can aid in saving time, cost, and energy. The central difference between the two is that hot-rolled stainless steel involves processing at high temperatures whereas cold-rolled stainless steel is processed further at room temperature.

Q: What is the difference between dom and cold drawn seamless tubing?

A: No, cold drawn seamless, cds, is not the same as dom. Cds starts as a solid round billet and is formed into a tube. There is no welding involved. Dom starts as a flat sheet that is rolled and welded and then worked to flatten the weld seam.

Q: What is the process of cold tube drawing?

A: Cold tube drawing is a metal forming process that allows manufacturers to produce high-precision tubes. The dimensions of the tube are reduced by pulling it through a conical converging die with or without inner tool. In this study, finite element modelling has been used to give a better understanding of the process.

We're professional cold drawn tube manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale cheap cold drawn tube from our factory. For price consultation, contact us.

steel cold drawn tubes, steel tubing, thin walled seamless steel tube

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