Cold Drawn or Cold Rolled EN 10305 E215 E235 E335 Seamless or
Welded Precision Steel Tube
| Product name: | Cold Drawn or Cold Rolled EN 10305 E215 E235 E335 Seamless or
Welded Precision Steel Tube |
| Standard: | EN10305-1, EN10305-2, EN10305-3, EN10305-4, EN10305-5, EN10305-6, ... |
| Grade: | Q345, E255, E355,etc. |
| Technical: | Cold Drawn or Cold Rolled |
| Size Range: | OD: 4-200 mm WT: 0.5-22 mm Or according to customers' actual application and production. |
| Application: | For auto industry, machinery use, oil cylinder, motorcycle shock
absorber. |
| Inspection items: | Chemical composition test, Tensile test, Flattening test, Flaring
test, Compactness test , Surface roughness check |
1.Chemical composition:
| 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 | - |
2.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. |
2. Production process:
EN1035 series tubes, cold drawn and bright annealed precision
seamless steel tube is used as the tube to be phosphated.
The phosphorization is realized with the imported chemical fluid to
form a black film.
The antirust oil is absorbed by means of the micropore on the film
to prevent the tubes from getting rust.
5. Our products are widely used in:
Engineering machinery Machine tool industry Hydraulic industry
Special vehicle
Automobile pipeline Heavy machinery Compressor Shipbuilding
industry
Railway locomotive Diesel engine Utility boiler Injection molding
machine
Power equipment Heavy duty automobile Forging and stamping machine
4. Main Characteristics:
No Oxidation Layer on the Outer and Inner Walls, No Crack under
Flaring and Flattening
No Leakage under High Pressure,No Distortion after Cold Bending,
High Precision High Cleanness Excellent Brightness
Product Display of Precision Steel Tube
Manufacturing Process
Packing and Delivery
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.
FAQ
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and
solution provider.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is
30-60 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples ? is it free or extra ?
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
