DIN 2391 ST 35 NBK Cold Drawn Seamless Steel Tube
Product Description
The DIN 2391 ST 35 NBK Cold Drawn Seamless Steel Tube is a high-quality steel tube designed for precision applications requiring seamless, cold-drawn processing. Made from ST 35 steel, it offers excellent strength, toughness, and durability, making it ideal for high-pressure and high-performance hydraulic systems. The NBK (annealed bright) surface finish enhances its corrosion resistance and surface quality, making it suitable for various industrial and automotive applications.
Product Advantages
Materials
- Steel Grade: ST 35
- Properties:
- ST 35: A low-carbon steel known for its good tensile strength and ductility.
- Excellent forming and welding capabilities, which are essential for high-precision applications.
International Standards
DIN 2391: Standard for precision seamless steel tubes used in hydraulic systems.
Dimension
Cold Drawn/Rolled Seamless Precision Steel Tubes Confirming To DIN2391;EN10305-1;EN10305-4
| OD | Thickness（mm） | ||||||||||
| mm | |||||||||||
| 6 | 6*1 | 6*1.5 | |||||||||
| 8 | 8*1 | 8*1.5 | 8*2 | ||||||||
| 10 | 10*1 | 10*1.5 | 10*2 | ||||||||
| 12 | 12*1 | 12*1.5 | 12*2 | 12*2.5 | |||||||
| 14 | 14*1 | 14*1.5 | 14*2 | 14*2.5 | 14*3 | ||||||
| 15 | 15*1 | 15*1.5 | 15*2 | 15*2.5 | 15*3 | ||||||
| 16 | 16*1 | 16*1.5 | 16*2 | 16*2.5 | 16*3 | ||||||
| 18 | 18*1.5 | 18*2 | 18*2.5 | 18*3 | 18*3.5 | 18*4 | |||||
| 20 | 20*1.5 | 20*2 | 20*2.5 | 20*3 | 20*3.5 | 20*4 | |||||
| 22 | 22*1.5 | 22*2 | 22*2.5 | 22*3 | 22*3.5 | 22*4 | |||||
| 25 | 25*2 | 25*2.5 | 25*3 | 25*3.5 | 25*4 | ||||||
| 28 | 28*2 | 28*2.5 | 28*3 | 28*3.5 | 28*4 | ||||||
| 30 | 30*2 | 30*2.5 | 30*3 | 30*3.5 | 30*4 | 30*4.5 | 30*5 | ||||
| 32 | 32*2 | 32*2.5 | 32*3 | 32*3.5 | 32*4 | 32*4.5 | 32*5 | ||||
| 34 | 34*2 | 34*2.5 | 34*3 | 34*3.5 | 34*4 | 34*4.5 | 34*5 | 34*6 | |||
| 35 | 35*2 | 35*2.5 | 35*3 | 35*3.5 | 35*4 | 35*4.5 | 35*5 | 35*6 | |||
| 38 | 38*2 | 38*2.5 | 38*3 | 38*3.5 | 38*4 | 38*4.5 | 38*5 | 38*6 | |||
| 40 | 40*2.5 | 40*3 | 40*3.5 | 40*4 | 40*4.5 | 40*5 | 40*6 | ||||
| 42 | 42*2.5 | 42*3 | 42*3.5 | 42*4 | 42*4.5 | 42*5 | 42*6 | ||||
| 45 | 45*2.5 | 45*3 | 45*3.5 | 45*4 | 45*4.5 | 45*5 | 45*6 | ||||
| 46 | 46*2.5 | 46*3 | 46*3.5 | 46*4 | 46*4.5 | 46*5 | 46*6 | ||||
| 48 | 48*2.5 | 48*3 | 48*3.5 | 48*4 | 48*4.5 | 48*5 | 48*6 | ||||
| 50 | 50*2.5 | 50*3 | 50*3.5 | 50*4 | 50*4.5 | 50*5 | 50*6 | ||||
| 54 | 54*3 | 54*3.5 | 54*4 | 54*4.5 | 54*5 | 54*6 | |||||
| 60 | 60*3 | 60*3.5 | 60*4 | 60*4.5 | 60*5 | 60*6 | 60*8 | ||||
| Note: 1. We can produce other specification as your requirements. 2. Surface treatment: Bright, galvanized (yellow, white, colorful), phosphated，army green passivation. |
|||||||||||
Features
- Seamless Construction: Made from a seamless tube, offering superior strength and uniformity compared to welded alternatives.
- Cold Drawn: The cold-drawing process improves dimensional accuracy, surface quality, and mechanical properties.
- NBK (Annealed Bright): This surface finish provides enhanced corrosion resistance, smoother surface finish, and improved mechanical properties.
- High Precision: Manufactured with strict tolerances to ensure a high level of precision, essential for hydraulic systems.
- Durability: Strong and durable, suitable for high-pressure and demanding applications.
Surface Finish
- NBK (Annealed Bright):
- Annealed brightprocessing provides a smooth, polished finish, enhancing both aesthetic appeal and functional resistance to corrosion.
- This surface finish reduces friction in hydraulic systems and extends the life of the components.
Specifications
| Specification | Details |
| Standard | DIN 2391 |
| Steel Grade | ST 35 |
| Surface Finish | NBK (Annealed Bright) |
| Application | Hydraulic, automotive, industrial |
Dimensions
| Outside Diameter (mm) | Wall Thickness (mm) | Length (m) |
| 6 – 100 | 1.0 – 10.0 | 6.0 (customizable) |
Production Process
- Cold Drawing: The tube undergoes a cold-drawing process to improve its dimensional accuracy and mechanical properties, enhancing the tube’s strength and surface finish.
- Annealing (NBK): After cold drawing, the steel tube is annealed in a controlled process to relieve internal stresses, enhance ductility, and achieve the bright finish.
- Surface Treatment: The surface is further treated to remove any surface imperfections and improve resistance to corrosion and wear.
- Quality Control: Each tube undergoes rigorous quality control tests, including dimensional checks, pressure testing, and non-destructive testing (NDT), ensuring compliance with international standards.
Applications
- Hydraulic Systems: Ideal for high-pressure fluid transport, such as hydraulic cylinders, pumps, and valves.
- Automotive Industry: Used in the production of components requiring precision and high mechanical strength, including brake lines and steering systems.
- Industrial Machinery: Applied in various industrial machines and tools, such as injection molding machines and compressors.
- Energy and Manufacturing: Suitable for use in manufacturing equipment and machinery that operates under high pressure and requires precision parts.
Why Choose DIN 2391 ST 35 NBK Cold Drawn Seamless Steel Tube?
- High Precision: Cold-drawn manufacturing ensures tight tolerances and a superior surface finish, crucial for precision applications.
- Durable and Reliable: The seamless construction combined with the NBK finishmakes this tube ideal for long-term use in high-pressure and demanding environments.
- Wide Range of Applications: Perfect for hydraulic, automotive, and industrial machinery, providing flexibility across different sectors.
Related Products
Din EN 10305 Seamless Precision Steel Tubes
DIN EN 10305 Seamless Precision Steel Tubes are high-qu ... Read more
EN 10305-4 E235+N Equivalent Metric Hydraulic Tube
The EN 10305-4 E235+N Metric Hydraulic Tube is a high-p ... Read more
High-Pressure Precision Seamless SAE J524 Hydraulic Tubing
High-Pressure Precision Seamless SAE J524 Hydraulic Tub ... Read more
E 235+N Steel Hydraulic Tubing For Sale
E 235+N Steel Hydraulic Tubing is a high-quality seamle ... Read more
Application
For Construction Machinery
DIN 2391 precision hydraulic steel pipes are widely use ... Read more
For Agricultural Machinery
EN-10305 precision seamless steel tubes are widely used ... Read more