Product Specifications

Compliant with BS EN 10210, compatible with ASTM A501, AS 1163, JIS G3466, and GB/T 6728 for cross-application scenarios; its mechanical properties are comparable to S355J2 steel plate specified in EN 10025-2 standard.

Dimensional Range

We offer a comprehensive size range to meet diverse project requirements, with precise dimensional control to minimize subsequent processing costs:

• Section Shape: Circular (CHS), Square (SHS), Rectangular (RHS) – all available as standard options
• Outer Diameter (OD): Circular tubes 16.3mm ~ 3048mm; Square tubes 20x20mm ~ 1000x1000mm; Rectangular tubes 50x30mm ~1200x1000mm
• Wall Thickness (WT): 3.2mm ~ 50mm (customizable up to 50mm for special orders)
• Length: 6m ~ 12m (standard), 3m ~ 18m (customizable); Tolerance: Length ±500mm (approximate) or 0/+10mm~0/+15mm (exact length)
• Dimensional Tolerance: Outer diameter ±1% (minimum ±0.5mm, maximum ±10mm); Wall thickness -10%; Weight ±6% for individual lengths

Chemical Composition

Strictly controlled chemical composition to ensure product stability and performance (max values unless specified), consistent with the chemical requirements of S355J2 series structural steels:

• Carbon (C): 0.22%
• Silicon (Si): 0.55%
• Manganese (Mn): 1.60%
• Phosphorus (P): 0.025%
• Sulfur (S): 0.025%
• Niobium (Nb), Vanadium (V), Titanium (Ti): Trace amounts (per EN 10210 standard) to enhance grain refinement and mechanical properties
• Aluminum (Al): Minimum total content (for fine-grain control); Copper (Cu): ≤0.55% (trace element to assist in corrosion resistance)

Mechanical Properties

S355J2H steel tubes exhibit excellent mechanical performance, especially superior low-temperature toughness, suitable for heavy-load and low-temperature applications:

• Yield Strength (Reh): Minimum 355 N/mm² (for thickness ≤16mm); 345 N/mm² (for thickness >16mm); gradually decreases with increasing thickness, e.g., 335 N/mm² for 16-40mm, 325 N/mm² for 40-63mm[3].
• Tensile Strength (Rm): 470 ~ 630 N/mm², which is comparable to S355 series structural steels with a tensile strength range of 450-680 N/mm²[3].
• Elongation (A): Minimum 22%
• Impact Strength: 27J @ -20℃, meeting the low-temperature toughness requirement of J2 quality grade, ensuring good toughness in cold regions and harsh environments[3].
• Carbon Equivalent (CEV): Maximum 0.45%, ensuring excellent weldability; preheating may be required only for thick-walled tubes (＞20mm) or complex welding structures.

Core Advantages

High Strength & Lightweight: With a minimum yield strength of 355 N/mm², it enables material cost savings and lighter structures while maintaining structural integrity, reducing overall project weight and construction costs; its strength is slightly higher than that of ordinary carbon structural steel, suitable for medium-load bearing scenarios[4].

• Excellent Processability: Fully killed steel ensures outstanding weldability, formability, and machinability; tight corner radii (<2t) exceed standard requirements, enhancing aesthetic appeal and avoiding brittle fracture risks associated with cold-formed products; welding can adopt conventional processes, and no preheating is required for thin-walled tubes.
• Superior Low-Temperature Toughness: Complies with J2 quality grade, with impact strength of 27J @ -20℃, making it applicable in cold regions (such as northern Europe, northern Asia) and low-temperature working environments, avoiding brittle fracture under low-temperature conditions[3].
• Precise Dimensional Accuracy: Advanced hot-finishing technology ensures uniform surface finish and tight dimensional tolerances, minimizing the need for secondary processing and improving construction efficiency.
• Versatile Corrosion Protection: Optional surface treatments include black oxide, oil coating, galvanizing, 3LPE, 3LPP, and FBE, effectively improving corrosion resistance; trace copper elements in the material also assist in enhancing atmospheric corrosion resistance to a certain extent, extending service life in humid, marine, or industrial environments.
• Certified Quality: All products are CE marked, batch-tested, and supplied with 3.1 test certificates for full batch traceability, complying with international structural and mechanical application requirements, and meeting the quality control standards of EN 10210 and EN 10025 series standards.

Main Applications

EN 10210 S355J2H steel tubes are widely used in various high-demand projects due to their balanced performance, especially suitable for low-temperature and medium-load scenarios, including but not limited to:

• Construction & Infrastructure: Building frameworks, columns, beams, trusses for residential, commercial, and industrial buildings; bridge girders, supports, and overpass/underpass structures; railway station frameworks and airport facilities (passenger terminals, aircraft hangars); especially suitable for construction projects in cold regions.
• Mechanical Engineering: Structural supports for cranes, excavators, and other heavy machinery; frameworks for industrial equipment, storage racks, and conveyor systems; mechanical structural parts bearing static or dynamic loads, where low-temperature toughness is required.
• Offshore & Marine: Structural components for offshore oil and gas platforms; ship superstructures, masts, and support systems, with optional corrosion protection for harsh marine environments; suitable for offshore operations in low-temperature sea areas.
• Renewable Energy: Foundations and structural towers for wind turbines; support structures for solar panel systems, especially applicable to wind power projects in cold and alpine regions.
• Other Applications: Storage tanks and silo structural elements; pipeline supports in industrial facilities; warehouse racks; and structural parts in mining, chemical, and transportation industries, where reliable toughness and strength are required.

Brisk Steel Factory