EN 10025 S355JR, S355J0, and S355J2 ISHB beams are widely used structural steel profiles for construction, industrial, and offshore projects. These high-strength steels comply with European standard EN 10025-2, ensuring consistent mechanical performance and reliable toughness.
Applications of ISHB Beams
| Steel Grade | Typical Applications | Key Advantages |
|---|---|---|
| S355J0 | General construction projects, earthquake- and wind-resistant structures | High strength, impact resistance at 0°C, suitable for heavy-duty building frames |
| S355J2 | Power plants, industrial sheds, warehouses, offshore platforms, railway bridges | High toughness at –20°C, lightweight, excellent for cold or harsh environments |
| S355JR | General construction and industrial projects | Cost-effective, high strength, deep section for vertical load bearing |
Key Features:
High load-bearing capacity under vertical, lateral, or dynamic loads
Lightweight yet durable designs for ease of installation
Wide range of dimensions and section depths (100 mm to 220 mm for ISHB)
Produced under expert supervision for longer service life
Available in circular, rectangular, or custom hollow shapes
Castellated Hollow Sections – EN 10025 S355JR / S355J0 / S355J2
Standards & Specifications
| Parameter | Specification |
|---|---|
| Standard | BS EN 10219 – Cold Formed Welded Structural Hollow Sections of Non-Alloy and Fine Grain Steels |
| Steel Grade | S235JRH |
| SHS (Square Hollow Section) Sizes | 20 × 20 mm – 400 × 400 mm |
| Wall Thickness | 0.5 mm – 25 mm |
| Length | 6,000 – 14,000 mm |
| Type | Seamless / Welded / ERW |
| Dimensional Tolerances | Thickness: ±10% |
| Packing | Bundled with anticorrosion treatment, varnish coating, beveled or square cut ends, end-capped, identity marks |
| Surface Protection | Black (self-coloured), varnish/oil coating, pre-galvanized, hot-dip galvanized |
Chemical & Mechanical Properties
Chemical Composition (Max, %)
| Steel Grade | Thickness (mm) | C | Si | Mn | P | S | N | CEV |
|---|---|---|---|---|---|---|---|---|
| S235JRH | 6 ≤ t ≤ 16 | 0.17 | – | 1.40 | 0.040 | 0.040 | 0.009 | 0.37 |
| S235JRH | 16 < t ≤ 40 | 0.39 | – | – | – | – | – | – |
| S235JRH | 40 < t ≤ 65 | 0.20 | – | 0.41 | – | – | – | – |
| S235JRH | 65 < t ≤ 70 | 0.44 | – | – | – | – | – | – |
Note: CEV – Carbon Equivalent Value, relevant for weldability assessment.
Services & Quality Assurance
Packaging: Special care in packaging for international shipment to prevent surface damage or deformation
Testing & Certification: Mill test certificates issued as per EN 10204 2.1, 2.2, 3.1, or 3.2; third-party inspections available
Applications: Used in construction, power plants, warehouses, refineries, offshore platforms, railway bridges, and industrial sheds
Key Advantages of Castellated and ISHB Beams
Enhanced bending strength and stability due to H-shape or castellated design
Optimized for vertical and lateral load-bearing
High tensile strength and durability
Wide variety of dimensions and customizable profiles
Suitable for both normal and low-temperature service conditions (S355JR, S355J0, S355J2)
Q1: What are S355JR steel beams?
S355JR steel beams are structural steel sections manufactured in accordance with EN 10025-2. The grade S355JR indicates a minimum yield strength of 355 MPa and impact toughness tested at room temperature, making it suitable for general structural applications.
Q2: Which standard applies to S355JR steel beams?
S355JR steel beams are produced under EN 10025-2, the European standard for hot-rolled structural steels. This standard defines chemical composition, mechanical properties, impact test requirements, and delivery conditions.
Q3: What mechanical properties does S355JR steel offer?
S355JR steel typically provides a minimum yield strength of 355 MPa, tensile strength ranging from approximately 470 to 630 MPa, and good elongation. These properties ensure reliable load-bearing capacity and structural safety.
Q4: What does the "JR" designation mean in S355JR?
The "JR" designation indicates that the steel has a minimum impact energy of 27 J tested at +20°C. This confirms adequate toughness for structures operating under normal ambient temperature conditions.
Q5: How does S355JR compare with S275JR steel beams?
Compared with S275JR, S355JR offers higher yield and tensile strength, allowing for reduced section sizes or higher load capacity. This often results in weight savings and improved structural efficiency.
Q6: Is S355JR steel beam suitable for welding?
Yes, S355JR steel beams exhibit good weldability due to controlled carbon content and low carbon equivalent (CE). Standard welding methods can be applied with proper welding procedures and preheating when required by thickness.
Q7: Can S355JR steel beams be used in bolted and riveted connections?
S355JR steel beams are well suited for bolted and riveted connections. Their mechanical properties ensure reliable performance under static and dynamic loads when proper design standards are followed.
Q8: What types of steel beams are commonly supplied in S355JR?
S355JR is widely available in I-beams, H-beams, HEA, HEB, HEM sections, and universal beams. Availability depends on rolling mill capabilities and regional standards.
Q9: What are typical applications of S355JR steel beams?
S355JR steel beams are commonly used in industrial buildings, commercial structures, bridges, platforms, power plants, warehouses, and heavy machinery frames where strength and reliability are required.
Q10: How does S355JR perform in low-temperature environments?
S355JR is suitable for standard temperature environments. For low-temperature service, grades such as S355J0 or S355J2 are recommended due to their improved impact toughness at lower test temperatures.
Q11: What surface condition is supplied for S355JR steel beams?
S355JR steel beams are typically supplied in the hot-rolled, as-rolled condition with mill scale on the surface. Additional surface treatments such as shot blasting, priming, galvanizing, or painting can be applied upon request.
Q12: What length and size ranges are available for S355JR steel beams?
S355JR steel beams are commonly supplied in standard lengths such as 6 m, 12 m, or customized cut-to-length options. Section sizes depend on beam type and mill production range.