DIN2391/EN10305 +NKB Steel Tube
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rief Introduction
Hydraulic Galvanized Seamless Steel Tube with High Precision is produced base on DIN 2391 and EN10305. It is widely used in hydraulic systems, machine tools, automobiles, ships, construction machinery and vehicles. The Hydraulic galvanized seamless steel tube with high precison has lots of advantages: No corrosion after 120 hours SALT SPRAY TEST;Good performance in Anti Corrosion & Rust;Bright pipe electro coated with Zinc;Different Color: White/ Yellow/Colorful ;High Pressure /No leakage seamless steel pipe.
Parameters:
| Grade | ST35/E235 ST37.4 ST45/E255 ST52/E355 |
| Standard | DIN2391 DIN1630 EN10305 DIN2445 JIS G3445 SAE J524 |
| Delivery Conditon | NBK(+N) BK(+C) GBK(+A) BKW(+LC) BKS(+SR) |
| Length | 6m or as Customers’request |
| Tolerance | Outer Diameter: According to Standard |
| Thickness: According to Standard | |
| Finish | Galvanized surface (Sliver/Yellow/Colorful) |
| Zinc coating of 8-12um | |
| Application | Hydraulic System;Car/bus;construction vehicle |
| Delivery time | A.7 days if this goods is stock goods. |
| B.20 days if this goods will be produced after order |
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 (+LC) |
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. |
Certificates: According to EN 10204 3.1
Inspection Items:
Tensile stength, Yield stength, Elongation, Flattenging, Flaring;
Chemical analysis
Eddy Current Test 100%, Size and surface checking 100%
Other test item can be arranged by A Third Party as per request.
