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5mm 7mm 9mm 11mm 13mm Galvanized Hydraulic Seamless Steel Pipe Tube

DIN2391 Galvanized Hydraulic Oil Pipe Tubing
Din 2391 C Zinc Coated Seamless Steel Pipes Tube
  • HY-CDS


  • 730431


5mm 7mm 9mm 11mm 13mm Galvanized Hydraulic Seamless Steel Pipe Tube

     QINGZHOU DOOHARVEST INTERNATIONAL CO., LTD. develops and produces the high quality seamless steel tubes. As one of the leading manufacturers in China, confirming to DIN2391/C, EN10305 and SAE J524 standard. We develops customized tubes solutions for Automotive, engineering machinery, railway locomotive, ships and hydraulic systems, etc.

     We focus on R & D and keep improving the quality of our tube, selects the high quality steel billet which have good chemnical composition and mechanical properties. Including elongation, tensile strength, high pressure resistance should meet the requirements. When the production of manufacturing, every process is strictly controlled and tested to insure quality. Our products benefit from very good bending and forming properties, and stand out through good adhesion and high ductility.


图片包含 室内, 夹, 充满, 桌子 描述已自动生成Specification


Chemical Composition

Steel grade C
Name Number
E215 1.0212 0.10 0.05 0.7 0.025 0.015 0.025
E235 1.0308 0.17 0.35 1.2 0.025 0.015 --
E355 1.0580 0.22 0.55 1.6 0.025 0.015 --

Mechanical Properties

Steel grade Yield strengtha Tensile strength Elongation
Name Number ReH Rm A
min. min. min.
MPa MPa %
E215 1.0212 215 290 to 430 30
E235 1.0308 235 340 to 480 25
E355 1.0580 355 490 to 630 22

Delivery Condition

Designation Symbol Description
Cold finished (hard) BK(+C)
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation

Cold finished (Soft) BKW

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)

Cold finished and stress-relieved BKS(+SR)
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

Annealed GBK(+A) The last Cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK(+N) The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.




Quality assurance
1.Strictly according to DIN2391/EN10305 
2.Sample: Sample is free for test.
3.Test:salt spray test/tensile test / Eddy current / chemical composition test according to customers' request.

Our services

1. MOQ: if the size is Metric, it's no MOQ, if the size is Inch, the MOQ is 1 ton per size
2. OEM: we can produce the tubes as client's demand
3. Good Quality: we strictly control every production process to ensure the high quality
4. After-sales service: we not only guarantee the precision tubes'
quality but also provide technical support
5. Fast delivery: if we have precision tubes in stock, will deliver the tubes after 5-15 days.
If we don't have the raw material, will deliver the tubes after 30-40 days according to the quantity.


Ms. Carter 

Whatsapp:+86 157 6249 1265 

Email: carter@dhonedtube.com 


Prefessional manufacturer of Honed tube, Hard
chrome plated rod, Hydraulic seamless pipe.
We sincerely hope there would be a chance for us to start business and build long term relationships may from an inquiry soon.
  sales@dhonedtube.com
  Yangshan Town, Huishan District, Wuxi City, China 
      Qingzhou, Weifang, China

Please contact us with inquiry or questions by filling in the form below. We will contact you in first time. :-)


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