EN 10210 S355J2H is a hot-finished structural hollow section manufactured in accordance with the European standard EN 10210. It features a minimum yield strength of 355 MPa for wall thicknesses up to 16 mm and offers excellent toughness at low temperatures, capable of withstanding impacts down to -20°C. This makes it a versatile choice for a wide range of applications in construction and engineering industries.
Manufacturing Process of EN 10210 S355J2H Pipes
EN 10210 S355J2H pipes can be produced through either seamless or welded manufacturing techniques. Among the welded types, two common methods include:
ERW (Electric Resistance Welding):
This process uses resistive heat and pressure to bond materials. It is efficient, suitable for mass production, and works well across various thicknesses and materials.
SAW (Submerged Arc Welding):
SAW involves an arc formed beneath a layer of granular flux, resulting in deeper penetration and superior weld quality. It is particularly effective for thicker sections.
Note: For unalloyed and fine-grained steel hollow sections made using welding, repair welding is not permitted, except when the SAW process is used.
Chemical Composition of S355J2H (Typical values, wt.%)
|
Element
|
C (Max)
|
Si (Max)
|
Mn (Max)
|
P (Max)
|
S (Max)
|
N (Max)
|
|
S355J2H
|
0.22
|
0.55
|
1.60
|
0.030
|
0.030
|
0.012
|
Note: The exact values may vary depending on the thickness and heat treatment conditions.
Mechanical Properties of EN 10210 S355J2H
|
Property
|
Value
|
|
Yield Strength (≤ 16 mm)
|
≥ 355 MPa
|
|
Tensile Strength
|
470 – 630 MPa
|
|
Elongation (L0 = 5.65√S0)
|
≥ 22%
|
|
Impact Toughness (at -20°C)
|
≥ 27 J (for J2 designation)
|
The “J2” in S355J2H indicates compliance with Charpy V-notch impact testing at -20°C.
Applications of EN 10210 S355J2H Steel Pipes
Due to its combination of high strength, good weldability, and excellent low-temperature performance, EN 10210 S355J2H is widely used in various industrial sectors, including:
Construction and Infrastructure:
Ideal for use in bridges, buildings, towers, trusses, subway systems, and roof or wall structures.
Piping Systems:
Suitable for conveying fluids under pressure, especially in systems requiring both strength and durability.
Marine and Offshore Engineering:
Used in shipbuilding, offshore platforms, and marine structural components.
Energy Industry:
Commonly used in wind power installations, oil rigs, and transmission pipelines.
Pressure Vessels:
Applied in the manufacturing of pressure-bearing equipment under defined heat treatment and welding standards.
Mining and Quarrying:
Employed in structural components for mines, including conveyor frames and ore handling systems.
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