E235 ERW Cold Drawn Precision Seamless Steel Tube Thin Wall Seamless Steel Pipe
Description:
| Standard | DIN,BS,EN |
| Outer Diameter | 6 to 273 mm |
| Thickness Tolerance | ±1% |
| Length | as your requirements |
| Technique | Cold drawn |
Packaging:
1. Marking: Size, standard,heat number as customer required
2. Surface: Oiled or Black painted to prevent rust
3. Inner Packing:Caps at both ends, steel strong trips on every bundle
4. Outer Packing:PE strip wrapping outside
5. We also can do as customers' requirements
Service:
1. We can provide the free sample for your inspection and check.
2. We can provide the personal customized service, such as adding your company's logo on the products, the specified color and so on.
3. If you come to China, we would like to show you around the factory.
4. If you have any question, please contact me without hesitation.
DELIVERY CONDITIONS
The tubes can be produced in the following delivery conditions:
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
Quality Contorl
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.
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