Changzhou Joyruns Steel Tube CO.,LTD
| Payment Terms | L/C, T/T |
| Supply Ability | 2000Tons/Month |
| Delivery Time | 30days |
| Packaging Details | plastic packing, end caps, wooden box packing |
| OD size | 6mm to 114.3mm |
| Thickness | 1mm to 20mm |
| Standard | DIN2391, EN10305, EN10216, EN10210 |
| Material | ST35, ST45, ST52 |
| Type | Seamless cold drawning precision tube |
| Delivery State | +N, +NBK,+C,+BKS,+GBK |
| Brand Name | Joyruns |
| Model Number | 25.4*2.77 |
| Certification | ISO9001 |
| Place of Origin | Changzhou |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 2000Tons/Month |
| Delivery Time | 30days | Packaging Details | plastic packing, end caps, wooden box packing |
| OD size | 6mm to 114.3mm | Thickness | 1mm to 20mm |
| Standard | DIN2391, EN10305, EN10216, EN10210 | Material | ST35, ST45, ST52 |
| Type | Seamless cold drawning precision tube | Delivery State | +N, +NBK,+C,+BKS,+GBK |
| Brand Name | Joyruns | Model Number | 25.4*2.77 |
| Certification | ISO9001 | Place of Origin | Changzhou |
| High Light | ST52.3 Seamless Precision Steel Tube ，ST52 Seamless Precision Steel Tube ，DIN17175 Extruded Steel Pipe | ||
ST52/ST52.3 DIN17175 Seamless cold drawing High precision Tubes
DIN 17175 St52.3 seamless boiler tube is widely used in boiler industry, petroleum, chemical industry, chemical fiber, metallurgy, medicine, machinery, paper, heat preservation, refrigeration, mechanical equipment, food, electricity, water, construction, aviation, aerospace, marine, shipbuilding, environmental protection and boiler heat exchangers.
St52 seamless tube is specially used for the heating surface tube of the medium and low-pressure boiler (working pressure not higher than 5.88 MPa, working temperature lower than 450 ℃). The seamless boiler tube can also be used as the heating surface tube, economizer, superheater, reheater and petrochemical industrial tube of the high-pressure boiler (the general working pressure is above 9.8 MPa, and the working temperature is between 450 ℃ and 650 ℃).
Chemical Composition:
| Steel grade | Chemical composition, as a percentage by mass | |||||
| Symbol | 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 |
| The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%. | ||||||
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Final supply conditions:
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Condition on delivery:
| Steel Grade | BK | BKW | GBK | NBK | ||||
| Code No. | Tensile Strength N/mm2 min | Elongation at rupture N/mm2 min | Tensile Strength N/mm2 min | Elongation at rupture N/mm2 min | Tensile Strength N/mm2 min | Elongation at rupture N/mm2 min | Tensile Strength N/mm2 min | Elongation at rupture N/mm2 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 |
Company Details
Business Type:
Manufacturer,Agent,Exporter,Seller
Year Established:
2000
Total Annual:
10000000-20000000
Employee Number:
150~300
Ecer Certification：
Verified Supplier
Changzhou Joyruns Steel Tube Co., Ltd specializes in the export of steel pipes for 20 years. We have been a leading supplier of high-quality steel pipes of carbon, alloy, nickel material & copper, which is one of the most professional Bundy and stainless steel pipe manufactur... Changzhou Joyruns Steel Tube Co., Ltd specializes in the export of steel pipes for 20 years. We have been a leading supplier of high-quality steel pipes of carbon, alloy, nickel material & copper, which is one of the most professional Bundy and stainless steel pipe manufactur...
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