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DIN2391 High Precision Seamless Steel Pipe Cold Drawn ST35 ST45 ST52 Precision Carbon Steel Tube
Product Details
| Outer Diameter | 6-630mm | Wall Thickness | 0.5-15mm |
|---|---|---|---|
| Length | Max 25m | Section Shape | Round |
| Surface Treatment | Black | Material Grade | St35, St45, St52 |
| Delivery Condition | BK, BKW, BKS, GBK, NBK | Chemical Composition C | 0.17-0.22% |
| Chemical Composition Si | 0.35-0.55% | Chemical Composition Mn | 0.40-1.60% |
| Chemical Composition P | 0.025% Max | Chemical Composition S | 0.025% Max |
| Tensile Strength | 480-640 N/mm² | Yield Strength | 315-490 N/mm² |
| Elongation | 4-25% | ||
| Highlight | DIN2391 Seamless Steel Pipe,High Precision Precision Carbon Steel Tube,ST35 ST45 ST52 Cold Drawn Seamless Pipe |
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Product Description
DIN2391 High Precision Seamless Steel Pipe
Cold drawn seamless precision carbon steel tubes manufactured to DIN2391 and EN10305 standards, available in grades ST37, ST45, and ST52. These high-precision pipes are ideal for hydraulic, pneumatic, and heat exchanger applications.
Product Specifications
Standards: ASTM, DIN, EN, GOST, SAE, JIS
Material Grades: Carbon Steel, Alloy Steel, or custom requirements
Outside Diameter: 19.05 mm
Wall Thickness: 2.11 mm
Length: 6m - 25m (custom lengths available)
Type: Cold Drawn or ERW
Ends: Plain ends or bevel ends
Key Features
- No oxidation layer on outer and inner walls
- No leakage under high pressure
- No cracking during flattening and flaring tests
- No distortion after cold bending
- High precision and excellent surface cleanness
- Superior performance for high pressure and temperature applications
- Excellent corrosion resistance
- Available with black finish or hot dip galvanized coating
Delivery Conditions
| Designation | Symbol | Description |
|---|---|---|
| Cold finished (hard) | BK | Tubes do not undergo heat treatment after final cold forming |
| Cold finished (soft) | BKW | Limited deformation with final heat treatment |
| Cold finished and stress-relieved | BKS | Heat treatment applied after last cold forming process |
| Annealed | GBK | Annealing in controlled atmosphere after cold forming |
| Normalized | NBK | Annealing above upper transformation point |
Chemical Composition
| Grade | C max | Si max | Mn | P max | S max |
|---|---|---|---|---|---|
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Applications
- Evaporators, heat exchangers, condensers, and heat transfer equipment
- Mechanical treatment, petrochemical industry, transport, and construction
- Structural purposes in construction and fulcrum bearings
- Fluid transportation in projects and large equipment
- Low and medium pressure boiler applications
- Hydraulic and pneumatic services
- Automotive and machinery components
Competitive Advantage
Asia's leading steel pipe manufacturer with production capacity exceeding 250,000 tons per year. Over 60% of production is exported to more than 35 countries worldwide. We deliver quality pipes and tubes at competitive prices with excellent customer service.
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