Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
Add to Cart
DIN2391 Cold Drawn Precision Steel Tube Black Phosphated Welded Hydraulic Steel Tubes
Description:
DIN2391 Cold Drawn Precision Steel Tube Black Phosphated Welded Hydraulic Steel Tubes are meticulously crafted components designed for high-performance hydraulic systems. These tubes, known for their precision and durability, undergo a specialized cold drawing process to ensure exceptional strength and resilience. The black phosphated finish not only enhances corrosion resistance but also provides a sleek appearance. With seamless welds and superior craftsmanship, these tubes deliver reliable performance in demanding industrial applications, making them a preferred choice for hydraulic systems worldwide.
| Process | Diameter | Length | Precision | Inner Hole Roughness |
| Cold Rolled | 30-100mm | ≤12 m | H8-H10 | 0.4-1.6 |
| Cold Draw | 30-250mm | ≤12 m | H8-H10 | 0.8-1.6 |
| Honing | 40-500mm | ≤12 m | H8-H9 | 0.4-0.8 |
| Rolling | 40-400mm | ≤7 m | H8 | 0.4 |
| Inner Diameter | H8 | H9 | H10 |
Steel Tube are manufactured according to technical specification of EN10305-2 Cold Drawn Welded
Precision Steel Tubes DOM tubing, with steel grade of E155,E195,E235,E275,E355 and delivery
Delivery Condition:
The tubes can be produced in the following delivery conditions:
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point.
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
Our Advantage:
1.Professional & skilled & reliable
2.One step total solution
3.Ready stock goods with fast delivery
4.Customizable:Non-standard sizes are also available
5.Small quantity is acceptable
6.Refund or replacement for any product faulty
Application:
1.Widely used in the mechanical treatment field, petrochemical industry, transport and construction field
2.Ordinary structural purposes and mechanic structural purposes, for example in construction field, fulcrum bearing etc;
3.The transportation of fluids in the projects and big equipments, for example transport of water, oil, gas etc
4.Can be used in low and medium pressure boiler for the transportation of fluids, for example steam tube, big smoke tube, small smoke tube, generating tube etc
