EN 10210 S355J2H Seamless Steel Pipe

What is S355J2H Pipe?

S355J2H is a steel pipe grade in European standards, with a steel grade of 1.0576. It is a non-alloy steel pipe with a hollow cross-section for structural use. When the wall thickness is 16 mm or less, its minimum yield strength is 355 MPa, and its minimum impact energy at -20°C is 27 Joules. The standard for S355J2H steel pipe is available in two versions: EN 10210 and EN 10219.

The following are the meanings of the letters in S355J2H:

S: Structural steel;

355: Minimum yield strength of 355 MPa for wall thickness of 16 mm or less;

J2: Minimum impact energy of 27 J at -20℃;

H: Hollow section;

Due to its high strength and low-temperature resistance, S355J2H steel is widely used in various fields such as structures, construction, bridges, machinery, oil and gas, and marine engineering.

S355J2H Pipe Classification

S355J2H Pipe Chemical Components

FF = Fully killed steel containing a sufficient amount of nitrogen-binding elements to bind available nitrogen (e.g., a minimum content of 0.020% total aluminum or 0.015% soluble aluminum).

EN 10210 S355J2H Mechanical Properties

1. Yield Strength and Tensile Strength

2. Elongation and Impact

EN 10210 S355J2H Pipe Sizes

S355J2H Equivalent Material

Note: These materials have similar properties but are not entirely equivalent or substitutes for each other. Project specifications must be confirmed according to standards.

S355J2H Seamless Steel Pipe

1. EN 10210 S355J2H Seamless Steel Pipe Size

EN 10210-1 seamless steel pipes range in diameter from 4mm to 219mm and in wall thickness from 0.5mm to 20mm. Welded and ERW steel pipes have larger diameters, up to 1219.2mm.

S355J2H seamless steel pipes have smaller diameters, ranging from 3.35mm to 101.6mm. Wall thickness grades (Sch5 to XXS) vary. This material is available in various specifications, including single-twill, double-twill, and fixed-length cuts. Furthermore, it offers different surface treatments such as polishing, annealed pickling, and bright annealing.

EN 10210 S355J2H seamless steel pipes can have plain or threaded ends.

2. Production and Processing of S355J2H Seamless Steel Pipes

High-quality S355J2H seamless steel pipes are typically produced using hot rolling or cold drawing processes.

Hot rolling involves heating a round steel billet to approximately 1200℃, forming a hollow tube blank through a piercing mill, and then rolling it to the required dimensions using a continuous rolling mill. The key to this process lies in precise temperature control and deformation rate management; excessively high temperatures lead to coarse grains, while excessively low temperatures increase deformation resistance.

Cold drawing, on the other hand, involves drawing the steel at room temperature using dies, achieving higher dimensional accuracy (±0.1mm) and a smoother surface roughness (Ra≤0.8μm).

In quality control, ultrasonic testing (UT) can detect longitudinal defects ≥0.5mm, while eddy current testing (ET) is used for surface quality inspection.

According to product information, mainstream suppliers typically provide S355J2H seamless steel pipes that conform to international standards such as EN 10210 and ASTM A106/ASTM A53. Some high-end products also have CE and PED certifications.

3. Application Scenarios of S355J2H Seamless Steel Pipes

In the construction industry: Due to its high load-bearing capacity, S355J2H seamless steel pipes are widely used in large-span spatial structures such as stadiums and airport terminals.

The roof support system of a certain international airport uses S355J2H seamless pipes with a specification of Φ325×12mm. The span of a single component reaches 45 meters, reducing weight by 25% compared to traditional materials.

In the machinery manufacturing industry: Its excellent machinability is highly valued. Hydraulic cylinders in engineering machinery commonly use cold-drawn precision tubes with a diameter of Φ80-200mm, with an inner surface roughness controlled within Ra0.4μm and a straightness error ≤0.3mm/m. Wind turbine tower connectors typically use thick-walled (20-40mm) pipes, requiring an impact energy of ≥27J at -40℃.

In energy transmission: This material performs excellently in oil and gas field gathering pipelines. A Central Asia natural gas pipeline project used Φ406×15.9mm S355J2H seamless pipes, operating at pressures up to 12MPa, and maintained good performance for ten years in a -15℃ environment.

FAQ

1. What is the difference between EN10210 and EN10219 pipes?

Core difference: EN10210 is hot-formed, while EN10219 is cold-formed.

Hot-formed steel pipes generally have more stable structural performance and are therefore more favored in large-scale engineering structures.

2. What is the difference between S355J2H and S355JR?

S355J2H is a hollow structural steel conforming to EN10210/10219, with an impact temperature of -20℃.

S355JR is a plate/section steel conforming to EN10025, with an impact temperature of +20°C.

S355J2H exhibits better low-temperature toughness.

Summary

EN 10210 S355J2H seamless steel pipe is a high-strength structural hollow steel material with excellent low-temperature impact resistance, weldability, and high structural load-bearing capacity. Therefore, it is widely used in building structures, bridge engineering, marine engineering, wind power equipment, and machinery manufacturing.