EN 10305-4 E235 E355 +N Carbon Steel Pipe For Hydraulic / Pneumatic Power Systems
EN 10305-4 Standard Steel Pipe for hydraulic and pneumatic power systems
The steelmaking process of EN10305-4 is at the discretion of the manufacturer and steels shall be fully killed. The tubes shall be manufactured from hot finished seamless tubes by cold drawing. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere.
EN10305-4
seamless precision bending steel tubes of hydraulic systems
Size: 6-100mm
Delivery condition: +N, +C,+LC, +SR, +A
1. Standard:
EN10305-4 Cold drawn Precision Seamless Steel Pipes
2. Steel Grade:
E215,E235,E355, other materials upon agreement with customers.
3. Production method:
Cold drawing on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance,
with certain heat treatment to achieve better mechanical properties for bending and pressure purposes
4.Size range:
O.D.:5-100mm
W.T.:1-15mm
L:max12000mm
5. Packing:
In Hexagonal Bundles, wth anti-rust oil protection, with seaworthy packing
6.Deliver condition:
7.Inspection and testing:
Chemical analysis
Tensile test
Flattening test or Drift expanding test
Dimensional inspection
Visual examination
NDT for verification of leaking tightness
| Name | Number | C max | Si max | Mn max | P max | S max | Al min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.015 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.015 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.015 | - |
| Element | Specified limit of the cast analysis % by mass | Permissible deviation of the product analysis % by mass |
| C | ≤0.22 | +0.02 |
| Si | ≤0.55 | +0.05 |
| Mn | ≤1.60 | +0.10 |
| P | ≤0.025 | +0.005 |
| S | ≤0.015 | +0.003 |
| Al | ≤0.025 | -0.005 |
Summary of Inspection and testing
Requirements for the drift expanding test
| Steel grade | %increase of the diameter D for | ||
| Name | Number | T≤4mm | T>4mm |
| E215 | 1.0212 | 20 | 15 |
| E235 | 1.0308 | 18 | 12 |
| E355 | 1.0580 | 15 | 10 |
Heat Treatment Furnace:
Video link of the production Line:
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