Technical Details Summary
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Standard Specifications: DIN 1629, DIN 2391, DIN 17100 (Grade ST52, ST52.3), EN 10210 / EN 10297 S355J2H
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Manufacturing Scope: 100% Hot-Finished Structural & Cold-Drawn Precision Seamless Construction (SMLS)
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Size & Wall Range: 1/8" NB to 24" NB; Outer Diameters up to 610 mm; Wall Thickness 2.0 mm to 40.0 mm
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Mechanical Strength: Minimum Yield Strength 355 MPa ; Tensile Range 490–630 MPa
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Quality & Verification: EN 10204 3.1 Mill Test Certificates; Hydrostatic & NDT Inspected; Open for Third-Party Inspection (TPI)
Carbon Steel ST 52 Seamless Pipes Overview
Trident Metal & Alloys is a premier Carbon Steel ST 52 Seamless Pipes Manufacturer in India, producing high-tensile structural and precision piping for heavy engineering. Based on German DIN standards, Carbon Steel ST 52 Seamless Pipes combine low-carbon manganese steel with a 355 MPa yield strength for outstanding weldability and load-bearing performance.
As a leading Carbon Steel ST 52 Seamless Pipes Supplier in India, we offer fully certified DIN ST52 Seamless Pipes built without welded seams. This seamless structure helps the pipe easily handle high internal hydraulic pressure, mechanical torque, and heavy dynamic loads without risking joint failure.
We maintain ready stock of ST52 Carbon Steel Seamless Pipes, including DIN 1629 ST52 Seamless Pipes for structural fluid lines and DIN 2391 ST52 Seamless Pipes for precision hydraulic cylinders. All orders include cut-to-length options, clean end finishing, EN 10204 3.1 test certificates, and support 100% Third-Party Inspection (TPI).
Need piping for low-temperature applications? View our range of ASTM A333 Grade 6 Carbon Steel Seamless Pipes.
Technical Specifications & Size Capabilities
Manufacturing standards, dimensional capabilities, and end configuration options for Carbon Steel ST 52 seamless pipes.
| Technical Parameter | Specification Limits & Manufacturing Capabilities |
|---|---|
| Standard Specifications | DIN 1629, DIN 2391, DIN 17100, EN 10210, EN 10297, EN 10305-1 |
| Material Grades | ST52, ST52.3, ST52-3 BK/BKW/NBK/GBK |
| Manufacturing Type | Hot-Finished Seamless (SMLS) & Cold-Drawn Precision Seamless (BK/NBK) |
| Nominal Outer Diameter | 10.3 mm to 610 mm (1/8" NB to 24" NB) |
| Wall Thickness Range | 2.0 mm to 40.0 mm (Schedules: SCH 40, SCH 80, SCH 160, SCH XXS, and Heavy Wall) |
| Length Options | Single Random (5-7m), Double Random (10-12m), Custom Cut-to-Length up to 14,000 mm |
| Surface Finish | Black Phosphated, Oiled, Cold-Drawn Bright, Shot Blasted, Metallic Protective Coating |
| End Options | Plain End (PE), Beveled End (BE), Threaded & Coupled, Honed ID (for cylinders) |
Chemical & Mechanical Properties of ST 52 Pipes
Chemical Composition of ST52 Carbon Steel
| Chemical Element | Max Percentage (%) |
|---|---|
| Carbon (C) | 0.22% |
| Silicon (Si) | 0.55% |
| Manganese (Mn) | 1.60% |
| Phosphorus (P) | 0.025% |
| Sulfur (S) | 0.025% |
Mechanical Properties of ST 52 Seamless Pipe (Wall Thickness)
| Wall Thickness (mm) | Yield Strength (Min MPa) | Tensile Strength (MPa) | Elongation (Min %) |
|---|---|---|---|
| Up to 16 mm | 355 | 490 – 630 | 22% |
| 16 to 35 mm | 355 | 490 – 630 | 22% |
| 35 to 50 mm | 345 | 490 – 630 | 22% |
| 50 to 70 mm | 325 | 490 – 630 | 22% |
| 70 to 100 mm | 315 | 470 – 610 | 21% |
| 100 to 150 mm | 295 | 450 – 590 | 21% |
DIN Standards & Equivalent Specifications
Standard Differentiations for DIN ST52 Steel Pipes
DIN 1629 ST52
Hot-finished seamless pipes made for high-stress structural pipelines, chemical process equipment, and general engineering fluid systems.
DIN 2391 ST52
Cold-drawn precision seamless tubes with tight dimensional tolerances, smooth surface finishes, and excellent machinability for hydraulic cylinders and pistons.
DIN 17100 ST52-3
Fully killed structural steel pipe with added manganese for maximum load capacity, structural stability, and reliable weldability.
ST52.3 Seamless Pipes
Normalized fine-grain grade offering high toughness and guaranteed Charpy V-notch impact performance down to −20°C.
Global Material Equivalents for Carbon Steel ST 52 Pipes
| Standard / Region | Equivalent Grade |
|---|---|
| German (DIN) | ST52 / ST52-3 |
| European (EN) | S355J2H / S355NH |
| US (ASTM) | ASTM A501 Gr. B / A572 Gr. 50 |
| Japanese (JIS) | STKM 19A / SS490 |
| International (ISO) | E355 |
Advantages of ST 52 Carbon Steel Seamless Pipes
High Structural Strength
Strong 355 MPa yield strength allows lighter wall designs without sacrificing load-bearing safety.
Easy Field Welding
Low carbon content (≤ 0.22%) makes it easy to weld on job sites without requiring special preheating.
Precision Sizes
Manufactured to tight diameter tolerances under DIN 2391, making it perfect for smooth hydraulic cylinders and machined parts.
Tough Against Impact
Made with fine-grain steel processing that resists cracking under heavy shock and freezing weather down to −20°C.
Key Applications for ST52 Carbon Steel Seamless Pipes
Hydraulic & Pneumatic Cylinder Barrels
Cold-drawn precision tubes (DIN 2391 ST52) machined and honed for hydraulic actuators in construction equipment and dump trucks.
Heavy Structural Engineering
Crane booms, offshore platform jackets, earth-moving machinery chassis, and bridge structural columns utilizing high-strength hollow sections.
Automotive & Mechanical Components
Drive shafts, axle tubes, bushings, and high-load mechanical sleeves demanding uniform stress distribution without weld lines.
High-Pressure Fluid Systems
DIN 1629 ST52 Seamless Pipes used in high-pressure oil lines, chemical processing units, and industrial hydraulic power units.
Grade Selection: DIN ST52 vs ASTM A106 Grade B
Comparative technical evaluation between high-yield structural / precision tubing (DIN ST52) and high-temperature pressure service (ASTM A106 Grade B).
| Parameter | DIN ST52 (EN S355) | ASTM A106 Grade B |
|---|---|---|
| Primary Design Intent | High-yield structural machinery & precision hydraulic tubing | High-temperature pressure service for steam lines & refineries |
| Minimum Yield Strength | 355 MPa (51,500 psi) | 240 MPa (35,000 psi) |
| Minimum Tensile Strength | 490 – 630 MPa | 415 MPa (60,000 psi) |
| Standard Specification Scope | German DIN 1629 / DIN 2391 structural & precision standards | American ASTM / ASME high-temperature pressure pipe standards |
| Machinability & Honing | Exceptional in cold-drawn condition for precision cylinders | Designed for field bending, flanging, and joint welding |
Regional Supply Across India
Western Region (Maharashtra & Gujarat Industrial Belts)
We supply Carbon Steel ST 52 Seamless Pipes directly to hydraulic machine builders, heavy fabrication units, and auto component clusters in Mumbai, Pune, Pimpri-Chinchwad, Thane, Navi Mumbai, Ahmedabad, Vadodara, Rajkot, and Surat.
Northern & Central Region (NCR, Haryana & MP)
Direct distribution of precision DIN 2391 ST52 Seamless Pipes and structural sections for machinery OEMs across Delhi NCR, Gurgaon, Faridabad, Noida, Ghaziabad, Ludhiana, Indore, and Bhopal.
Southern Region (Tamil Nadu, Karnataka, Telangana & AP)
Regular dispatches of high-strength ST 52 Seamless Pipes to heavy equipment manufacturers, defense units, and engineering hubs in Chennai, Coimbatore, Bengaluru, Hyderabad, Visakhapatnam, and Peenya.
Eastern Region (West Bengal, Odisha, Jharkhand & Chhattisgarh)
Bulk supply of structural DIN 1629 ST52 Seamless Pipes for mining machinery, steel plant equipment, and heavy engineering projects in Kolkata, Durgapur, Jamshedpur, Rourkela, Bhilai, and Dhanbad.
Quality Verification & Material Documentation
Trident Metal & Alloys subjects all ST52 Carbon Steel Seamless Pipes to strict quality control protocols prior to dispatch:
Mill Test Certificates (MTC)
Fully compliant EN 10204 3.1 certificates providing heat code analysis, mechanical tensile and yield results, hardness testing, and Charpy impact values.
Dimensional & Surface Inspection
100% verification of outer diameter, inner diameter, wall thickness tolerances, ovality, and straightness to DIN precision standards.
Non-Destructive Testing (NDT)
100% eddy current, ultrasonic, or hydrostatic pressure testing to ensure continuous material density and structural integrity.
All dispatches comply with dimensional tolerances established across our broader Carbon Steel Seamless Pipe Product Range.
Frequently Asked Questions
Q: What is ST52 seamless pipe?
A: ST52 seamless pipe is a high-strength, low-carbon manganese steel pipe manufactured under DIN standards (such as DIN 1629 and DIN 2391). It offers a minimum yield strength of 355 MPa and strong weldability for structural and hydraulic uses.
Q: What is the difference between DIN 1629 ST52 and DIN 2391 ST52?
A: DIN 1629 ST52 applies to hot-finished seamless pipes intended for general pressure fluid lines and heavy structural frameworks. DIN 2391 ST52 applies to cold-drawn precision seamless tubes manufactured with tight dimensional tolerances for hydraulic cylinder barrels.
Q: What is the equivalent of DIN ST52 in EN and ASTM standards?
A: Under European standards (EN), DIN ST52 is equivalent to EN 10210 / EN 10297 S355J2H or S355NH. Under US standards, it corresponds to ASTM A501 Grade B or ASTM A572 Grade 50.
Q: Can ST52 seamless pipe be welded easily?
A: Yes. ST52 steel features a maximum carbon content of 0.22%, giving it excellent weldability using standard arc, MIG, or TIG welding methods without mandatory preheating in normal wall thicknesses.
Q: What certifications accompany ST 52 seamless pipe orders?
A: All orders are supplied with EN 10204 3.1 Mill Test Certificates verifying chemical composition, tensile strength, yield point, elongation, sub-zero impact test values, and NDT clearance.
Request a Quote
Partner with Trident Metal & Alloys for certified stock, competitive pricing, custom honing/cutting services, and fast dispatch across India and international destinations.
- Email Inquiries: tridentmetal96@yahoo.com
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