S355 Structural Seamless Steel Pipe is a high-strength structural carbon steel pipe widely used in construction, engineering structures, and heavy-duty industrial applications. It provides excellent mechanical strength, good weldability, and reliable performance in demanding structural environments.
Material Type :
S355JR / S355J0 / S355J2 Structural SteelOuter Diameter Range :
21.3mm – 630mmWall Thickness Range :
2.0mm – 60mmCustomizable :
YesOrder(MOQ) :
2TSpecifications
S355 structural seamless steel pipes are manufactured from high-quality structural steel with a minimum yield strength of 355 MPa, providing excellent strength and load-bearing capacity. The material also offers good toughness and weldability, making it suitable for various structural and engineering applications.
These pipes are produced through advanced seamless hot rolling or cold drawing processes, ensuring uniform wall thickness, strong structural integrity, and high pressure resistance. Compared with welded pipes, seamless pipes provide better mechanical reliability and durability in structural applications.
S355 structural seamless steel pipes are widely used in construction frameworks, mechanical structures, bridge engineering, heavy equipment manufacturing, and infrastructure projects. Their high strength and stable mechanical performance make them suitable for supporting heavy loads and demanding structural conditions.
With reliable mechanical properties and excellent structural performance, S355 seamless steel pipes are commonly selected for engineering structures, industrial frameworks, and large-scale construction projects that require strong and durable steel materials.
S355 Structural Seamless Steel Pipe is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).
| Grade | Grade Equivalent | Mechanical Properties | Size Range | Chemical Composition (Typical, %) |
|---|---|---|---|---|
| S355JR | EN 10210
|
Tensile 470–630 MPa
|
OD 10–610 mm
|
C≤0.24
|
| S355J0 | EN 10210
|
Tensile 470–630 MPa
|
OD 10–610 mm
|
C≤0.24
|
| S355J2 | EN 10210
|
Tensile 470–630 MPa
|
OD 10–610 mm
|
C≤0.24
|
| S355K2 | EN 10210
|
Tensile 470–630 MPa
|
OD 10–610 mm
|
C≤0.24
|
|
Note: If you do not find a S355 Structural Seamless Steel Pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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FAQs
Q: What types and standards of carbon steel do you mainly supply?
A: We mainly supply a wide range of carbon steel products including seamless and welded steel pipes, steel plates, coils, and bars. Common carbon steel grades include A36, A106, A53, API 5L, and S355, which are widely used in construction, machinery, and pipeline engineering. All carbon steel products comply with international standards such as ASTM, API, EN, and JIS. We can also provide corresponding material test certificates (MTC) and support customized specifications according to customer project requirements.
Q: Can you provide special specifications or non-standard customization? For example, extra-wide plates or pipes with specific wall thicknesses?
A: Of course. One of our advantages is our flexible customization capabilities. We can provide customized size cutting, special thicknesses, and special surface treatments (such as 2B, BA, No.4 brushed finish, mirror finish) based on your drawings or requirements. Whether it's a small trial order or a large-volume purchase, we can meet your needs.
Q: How do you guarantee the quality and consistency of materials? Do you have quality certifications?
A: Quality is our lifeline. We use direct supply from large steel mills to ensure material traceability. Each shipment comes with a Material Quality Certificate (MTC). We have our own quality control team that conducts random checks on material composition, dimensional tolerances, surface finish, and mechanical properties. Our factory is also ISO 9001:2015 quality management system certified.
Q: What are your delivery times and logistics solutions for overseas customers?
A: For standard-specification in-stock products, we can complete preparation and shipment within 7-14 days. Delivery times for customized products will be determined through negotiation based on the specific process. We have established international logistics partners who can arrange full container load (FCL), less-than-container load (LCL), or air freight according to your needs, and provide various trade terms such as EXW, FOB, CIF, and DDP, with door-to-door service.
Q: As a new customer, how do I begin cooperation? Can you provide samples for testing?
A: The cooperation process is very smooth: 1) You provide specific requirements (brand, specifications, quantity, standards); 2) We provide a quotation and technical advice; 3) After confirmation, we arrange the contract and payment; 4) Production/pickup and quality inspection; 5) Shipment and provision of documentation. We encourage sample testing. For serious customers, we can provide small-size samples to ensure that the materials fully meet your processing and application requirements.
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Note: If you do not find a S355 Structural Seamless Steel Pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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