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Cold Drawn Seamless Steel Pipe ST37 ST52 Precision Carbon Steel Tube OD 6-630mm
Product Details
| Model NO. | ST37 ST52 | Surface Treatment | Black |
|---|---|---|---|
| Section Shape | Round | Outer Diameter | 6-630mm |
| Wall Thickness | 0.5-15mm | Length | Max 25m |
| Material Grade | Carbon Steel / Alloy Steel | Delivery Condition | BK, BKS, BKW, NBK, GBK |
| Coating | Black Painting, Anti-rust Oiled Or Varnish | Chemical Composition C | 0.17-0.22% |
| Chemical Composition Si | 0.35-0.55% | Chemical Composition Mn | 0.40-1.60% |
| Tensile Strength | 480-640 N/mm² | Yield Strength | 315-450 N/mm² |
| Elongation | 4-25% | ||
| Highlight | ST37 ST52 Seamless Steel Pipe,OD 6-630mm Cold Drawn Pipe,Cold Drawn Precision Carbon Steel Tube |
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Product Description
Cold Drawn Seamless Steel Pipe ST37 ST52
Precision carbon steel tubes manufactured to DIN2391 and EN10305 standards, designed for high-performance applications in heat exchangers and hydraulic systems.
Product Specifications
Standards: ASTM, DIN, EN, GOST, SAE, JIS
Material Grade: Carbon Steel, Alloy Steel
Outside Diameter: 19.05 mm
Wall Thickness: 2.11 mm
Length: Maximum 25 meters
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 conditions
- No cracking during flattening and flaring tests
- No distortion after cold bending processes
- High precision and superior surface cleanness
- Excellent brightness for both cold drawn and hot finished products
- Superior performance for high pressure and temperature applications
- Available with black finish or hot dip galvanized coating
- Excellent corrosion resistance properties
Delivery Conditions
| Designation | Symbol | Description |
|---|---|---|
| Cold finished (hard) | BK | Tubes with high resistance to deformation, no heat treatment after final cold forming |
| Cold finished (soft) | BKW | Limited deformation with final heat treatment, suitable for cold forming |
| Cold finished and stress-relieved | BKS | Heat treatment after last cold forming, suitable for forming and machining |
| Annealed | GBK | Annealing in controlled atmosphere after last cold forming process |
| Normalized | NBK | Annealing above upper transformation point in controlled atmosphere |
Material Standards & Grades
| Standard | Steel Grade |
|---|---|
| Chinese Standard GB5310 | 20G, 15MoG, 12CrMoG, 12Cr2MoG, 15CrMoG, 12Cr1MoVG |
| American Standard ASTM | A106 Gr.A,B,C; A53 Gr.A,B; A179; A210 A-1,C; A333 Gr.1,3,6 |
| German Standard DIN17175 | ST35.8, ST45.8, ST37.0, ST44.0, ST52.0 |
| Japanese Standard JIS | G3454 STPG370, STPG410; G3461 STB340, STB410, STB440 |
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 applications in petrochemical industry
- Transport and construction structural purposes
- Fluid transportation in engineering projects and large equipment
- Low and medium pressure boiler systems
- Hydraulic pressure and pneumatic services
- Automotive and machinery components
- Oil cylinder tubes and shock reducer systems
Competitive Advantage
Asia's leading steel pipe manufacturer with annual production exceeding 250,000 tons. Over 60% of production shipped to more than 35 countries worldwide. We deliver quality pipes and tubes with competitive pricing and superior quality for global customers.
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