Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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EN10305-1 EN10305-4 Precision Seamless Steel Tubes +C +N +LC +SR +A Seamlee Steel Round Pipe
Standard Statement
EN 10305-1:2010. Steel tubes for precision applications. Technical delivery conditions. Seamless cold drawn tubes.
EN 10305-4:2011. Steel tubes for precision applications. Technical delivery conditions. Seamless cold drawn tubes for hydraulic and pneumatic power systems.
Material
Main material: E235,E355
Other aviliable material: 10#,20#,45#,16Mn, ST30Al,ST35, ST37,ST37.4,ST45,ST52,ST52.4,E155,E195,E255, etc
Size Range
OD: 4-120mm
WT: 0.5-15mm
Chemical Compositions
| Steel Number | Quality Level | Thickness/mm | Deoxidize Method | C(%)≤ | Si(%)≤ | Mn(%)≤ | P(%)≤ | S(%)≤ |
| E235(Fe360) | A B
C D | ≤16 ＞16-25 ≤40 ＞40
| N - - E NE NE GF | 0.22 0.17 0.20 0.17 0.20 0.17 0.17 | - 0.40 0.40 0.40 0.40 0.40 0.40 | - 1.40 1.40 1.40 1.40 1.40 1.40 | 0.050 0.045 0.045 0.045 0.045 0.040 0.035 | 0.050 0.045 0.045 0.045 0.045 0.040 0.035 |
| E355(Fe510) | C D | ≤30 ＞30 ≤30 ＞30 | NE NE GF GF | 0.20 0.22 0.20 0.22 | 0.55 0.55 0.55 0.55 | 1.60 1.60 1.60 1.60 | 0.040 0.040 0.035 0.035 | 0.040 0.040 0.035 0.035 |
Delivery Condition
| Designation | Symbol | Description |
| Cold drawn/ hard | +C | No heat treatment after the final cold drawig process. |
| Cold drawn/ soft | +LC | No heat treatment after the final cold drawig process. |
| Cold draw and stress relieved | +SR | After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere. |
| Annealed | +A | After the final cold drawing process the tubes are annealed in a controlled atmosphere. |
| Normalized | +N | After the final cold drawing operation the tubes are normalized in a controlled atmosphere. |
Application
Automotive pipeline system;hydraulic system of diesel engine and engineering machinery;hydraulic system of locomotive, aerospace and aviation,shipbuilding and various machinery;metal processing of wind power equipment;
Advantage of Precision Seamless Steel Tubes
2. High precision can be done in small batch production;
3. Cold drawing finished products with high precision and good surface quality.
4. The transverse area of the steel tube is more complicated;
5. Steel pipe performance is superior, metal is more dense.
Surface treatment:
Oil-dip;
Varnish;
Shot Blasting;
As customer's requirements.
Test:
100% Ultrasonic Detector
Eddy Current Detector
We have our own lab to control the material quility and to make sure the product meet the international standard.
