ST52 ST52.3 Seamless Precision Steel Tube DIN17175 Cold Drawn Extruded Pipe 5.88-9.8 MPa Pressure Rating
Price:
Negotiable
MOQ:
2Tons
Delivery Time:
30days
Brand:
Joyruns
Product Description
ST52/ST52.3 Seamless Precision Steel Tubes
High-precision seamless steel tubes manufactured through cold drawing and extrusion processes, compliant with DIN 17175 standards for superior performance in demanding industrial applications.
Applications
These seamless boiler tubes are engineered for use across multiple industries including:
- Boiler industry and heat exchangers
- Petroleum, chemical processing, and petrochemical industries
- Chemical fiber production and metallurgical applications
- Pharmaceutical, machinery, and paper manufacturing
- Food processing, electrical systems, and water treatment
- Construction, aerospace, marine, and shipbuilding sectors
- Environmental protection and refrigeration systems
Pressure and Temperature Specifications
ST52 seamless tubes are specifically designed for:
- Medium and low-pressure boilers (≤5.88 MPa working pressure, ≤450°C working temperature)
- High-pressure boiler applications (≥9.8 MPa working pressure, 450°C to 650°C working temperature)
- Heating surface tubes, economizers, superheaters, and reheaters
Chemical Composition
| Steel Grade | Material Number | C max. | Si max. | Mn | P max. | S max. |
|---|---|---|---|---|---|---|
| St 30 Si | 1.0211 | 0.10 | 0.30 | ≤0.55 | 0.025 | 0.025 |
| St 30 Al | 1.0212 | 0.10 | 0.05 | ≤0.55 | 0.025 | 0.025 |
| St 35 | 1.0308 | 0.17 | 0.35 | ≤0.40 | 0.025 | 0.025 |
| St 45 | 1.0408 | 0.21 | 0.35 | ≤0.40 | 0.025 | 0.025 |
| St 52 | 1.0580 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Optional alloying elements: Nb ≤0.03%, Ti ≤0.03%, V ≤0.05%, Nb + Ti + V ≤0.05%
Final Supply Conditions
| Designation | Symbol | Description |
|---|---|---|
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following final cold forming, providing high resistance to deformation |
| Cold finished (soft) | BKW | Final heat treatment followed by cold drawing with limited deformation, suitable for bending and expanding |
| Cold finished and stress-relieved | BKS | Heat treatment applied after last cold forming process, enabling forming and machining operations |
| Annealed | GBK | Last cold forming process followed by annealing in controlled atmosphere |
| Normalized | NBK | Last cold forming process followed by annealing above upper transformation point in controlled atmosphere |
Delivery Condition Specifications
| Steel Grade | BK | BKW | GBK | NBK | ||||
|---|---|---|---|---|---|---|---|---|
| Tensile Strength N/mm² min | Elongation % min | Tensile Strength N/mm² min | Elongation % min | Tensile Strength N/mm² min | Elongation % min | Tensile Strength N/mm² min | Elongation % min | |
| St30 Si | 400 | 8 | 330 | 12 | 280 | 30 | 290-420 | 30 |
| St30 Al | 400 | 8 | 330 | 12 | 280 | 30 | 290-420 | 30 |
| St 35 | 440 | 6 | 370 | 10 | 315 | 25 | 340-470 | 25 |
| St 45 | 540 | 5 | 470 | 8 | 390 | 21 | 440-570 | 21 |
| St 52 | 590 | 4 | 540 | 7 | 490 | 22 | 490-630 | 22 |
Product Images
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Changzhou Joyruns Steel Tube CO.,LTD
Location
No.143 Qingyang North road,Tianning district. Changzhou
Contact Person
Lee