What is EN10219 S355JR hollow section (S355JRH LSAW Steel Pipe)

In modern buildings and engineering structures, EN 10219 S355JR hollow profiles are widely used due to their superior mechanical properties and good processing performance, especially S355JRH round tubes produced by straight seam submerged arc welding (LSAW) process. This article combines the EN10219 standard to analyze the core characteristics and applications of S355JRH in detail.

I. S355JRH Character meaning

According to EN10219-1:2006 standard, clause 4.2.2, the meaning of the characters of S355JRH is as follows:

• EN10219 : refers to the European standard EN10219 “Non-alloy and fine grain steel cold-formed welded structural hollow profiles”;
• S : Structural steel;
• 355 : Indicates that the minimum yield strength of steel is 355MPa when the thickness is ≤16mm;
• JR : represents the impact performance grade of steel, requiring the impact energy to be ≥27J at room temperature (20 °C );
• H : Indicates that the material is a hollow section.

In summary, S355JRH is “cold-formed welded hollow profile that meets EN10219 standard, has a yield strength of 355MPa, and is qualified for room temperature impact test”, and straight seam submerged arc welding (LSAW) is one of its common manufacturing processes.

II. S355JR / S355JRH chemical composition and mechanical properties (according to EN 10219 requirements)

S355JR is a non-alloy structural steel. Its representative derivative model S355JRH is a version used for hollow structures. Its properties are clearly specified in standard EN 10219-1. The following are its chemical composition and mechanical properties:

• Chemical composition (maximum value, unit: %) [Refer to EN 10219-1:2006, Appendix A]

• Mechanical properties (applicable to thickness ≤ 40 mm) [Refer to EN 10219-1:2006, Table A.3]

Note: The “R” in S355JRH indicates room temperature impact performance and is suitable for general structural applications.

III. EN 10219 S355JRH Steel Pipe Specifications

According to EN 10219-2 standard and market supply practices, the typical size range of LSAW S355JRH steel pipes is as follows:

• Outer diameter range : φ219mm ～ φ1420mm
• Wall thickness range : 6mm ~ 50mm
• Length : 6m~12m (can be customized according to customer requirements)
• End form : flat end (PE), bevel end (BE)

IV. Typical applications of S355JRH steel pipe

S355JRH LSAW hollow steel pipe is widely used in the following fields:

• Building structure : high-rise building support columns, steel structure frames, truss structures
• Bridge engineering : bridge main beam, truss web
• Mechanical manufacturing : equipment brackets, load-bearing structural components
• Energy projects : wind power towers, solar power brackets
• Port and wharf construction : steel pile structure

Its excellent bending strength and good weldability make it the material of choice for heavy-load, high-reliability scenarios.

V. EN 10219 with international standards and widely used areas

EN 10219 is a European Union standard that is widely adopted in many countries around the world, including:

• Europe : Germany, France, UK, Italy, Poland, etc.
• Middle East and Asia : UAE, Saudi Arabia, Qatar, India, Singapore
• Australia and America projects : EN standards are specified in some international bidding projects

S355JRH steel grade is compatible with EN 10025 S355JR, commonly used in European construction and industrial fields, and can also be benchmarked against ASTM A500 Gr.C, JIS G3466 and other standards.

VI. Why choose LONGMA as your EN10219 S355JRH LSAW steel pipe supplier?

Hebei LONGMA, as a professional round tube ERW/LSAW manufacturer, has the following advantages in the manufacture of EN 10219 S355JRH steel pipes :

• Standardized production capacity

  • Strictly follow EN 10219 and ISO9001 quality management system
  • Support EN 10204 3.1 or 3.2 inspection report

• Complete product range

  • Focus on round structural pipe production (ERW/LSAW)
  • Custom sizes and high performance steel grades (such as S355J2H) available

• High welding quality and NDT inspection

  • Adopt advanced straight seam submerged arc welding technology
  • Full-length ultrasonic (UT) or X-ray testing to ensure weld quality

• Rich export experience

  • The products have been exported to Southeast Asia, the Middle East, Europe and other regions, serving many large-scale infrastructure projects

• Fast delivery & competitive price

• • Owns large-diameter LSAW steel pipe continuous production line
  • Direct supply to construction sites, saving procurement costs

EN 10219 S355JRH hollow profile is a cost-effective structural steel pipe, widely used in engineering projects that require strength, durability and welding performance. Choosing LONGMA, a certified manufacturer with advanced equipment and reliable supply, is the key to ensuring project quality and delivery efficiency.

For more technical parameters, stock information or quotes about S355JRH steel pipe, please contact LONGMA official team !