Cold Drawn Hydraulic OD 80mm EN10305-4 E235 E355 Precision Steel Tube
Hydraulic and Pneumatic Precision Steel Tubes are manufactured according to technical standard of EN10305-4
E235 E355 +N, with the characteristic of good tolerances and perfect surface quality for both OD and ID, Surface
treatment is available according to customers PO and specific requirement. Both OD and ID surface roughness is
well controled during cold drawing or cold rolled production, usually the delivery condition would be +C or +N.
1. Seamless Precision Steel Pipe Standard:
EN10305-4 Cold drawn tubes for hydraulic and pneumatic power systems
2. Seamless Precision Steel PipeSteel Grade:
E215,E235,E275,E355, other materials upon agreement with customers.
3. Seamless Precision Steel Pipe 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.Seamless Precision Steel Pipe Size range:
O.D:6-80mm, WT: 0.5-15mm, Length:＜12000mm or as sustomer's requirements
5. Seamless Precision Steel Pipe Packing:
In Hexagonal Bundles, with anti-rust oil protection, with seaworthy packing
6. Seamless Precision Steel PipeDeliver condition:
+N After the final cold drawing operation the tubes are normalized in a controlled atmosphere
Seamless Precision Steel Pipe Steel Grade and Chemical Compositions:
| Steel Grade | C | Si | Mn | P | S | Al |
| Steel Name | Steel Number | max | max | max | max | max | min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
Delivery Conditions
The tubes shall be manufactured from hot finished seamless tubes by cold drawing or other suitable processes.
The tubes shall be supplied in one of the delivery conditions as follows:
| Designation | Symbol | Description |
| Cold drawn/hard | +C | No heat treatment after the final cold drawing process. |
| Cold drawn/soft | +LC | After the final heat treatment there is a suitable drawing pass. |
| Cold drawn and stress relieved | +SR | After the final cold drawing process there is a stress relief 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. |
Seamless Precision Steel Pipe in production showing the surface quality:
Seamless Precision Steel Pipe in Cold Drawing Production:
Seamless Precision Steel Pipe Wooden Box Packing for export:
Manufacturing Process
QUALITY CONTROL
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects
FQA
Q: Are you trading company or manufacturer?
A:We are a professional steel pipes materials manufacturer.
Q: How long is your delivery time?
A: Generally it takes 7-14 days if the goods are in stock or 30-60 days if there is no stock, this mainly depends on quantity.
Q: Do you provide free samples?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us.
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Cold Drawn Hydraulic OD 80mm EN10305-4 E235 E355 Precision Steel Tube Images
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