The S355JR Channel Steel 120x60mm offers a robust and reliable solution for medium-to-heavy structural applications. Crafted from high-performance S355JR structural steel, this C-shaped channel delivers exceptional load-bearing capacity within a compact 120x60mm profile.
Its combination of strength, versatility, and durability makes it an ideal choice for construction, industrial, and infrastructure projects, especially where safety and efficiency are critical.
Technical Specifications
| Parameter | Specification | Unit | Remarks |
|---|---|---|---|
| Material Grade | S355JR (High-Strength Structural Steel) | - | Complies with EN 10025-2:2004 standard |
| Chemical Composition | C ≤0.24%, Si ≤0.55%, Mn ≤1.60%, P ≤0.045%, S ≤0.045%, N ≤0.012% | - | Controlled alloy content ensures high strength and weldability |
| Cross-Sectional Dimensions | Web height: 120, Flange width: 60 | mm | Standard C-channel profile for structural stability |
| Typical Thickness (Web/Flange) | 5.0–7.0 | mm | Influences weight, strength, and load capacity |
| Weight per Meter (Approx.) | 10.5–13.8 | kg/m | Calculated based on cross-sectional dimensions and density |
| Yield Strength (Minimum) | 355 | MPa | Higher than S235JR, ideal for heavy-load applications |
| Tensile Strength | 470–630 | MPa | Superior tensile performance for demanding structural needs |
| Elongation (Minimum) | ≥21% (for thickness ≤16mm) | % | Ensures ductility for bending and forming without brittle failure |
| Impact Toughness | ≥27 J at +20°C (longitudinal) | J | Resistant to sudden impact loads in ambient conditions |
| Weldability | Excellent | - | Compatible with MIG, TIG, and arc welding processes |
| Formability | Good | - | Can be cut, drilled, and bent for on-site customization |
| Corrosion Resistance (Base) | Moderate | - | Can be enhanced with galvanization or painting for outdoor use |
| Surface Finish | Mill finish | - | Clean, uniform surface ready for further treatment |
| Typical Applications | Heavy-duty frames, bridge components, industrial machinery supports, construction girders, and load-bearing structures | - | Preferred for projects requiring high strength-to-weight ratio |
Key Advantages
High Load-Bearing Capacity – S355JR ensures structural integrity under heavy loads.
Excellent Weldability – Compatible with standard welding processes for easy fabrication.
Good Ductility and Formability – Can be modified on-site without risk of brittle failure.
Versatile Applications – Suitable for bridges, industrial equipment, and construction frameworks.
Durable and Reliable – Moderate corrosion resistance can be further enhanced for outdoor exposure.
What is S355JR Channel Steel?
S355JR Channel Steel is a structural steel profile conforming to EN 10025-2 with a minimum yield strength of 355 MPa. The "JR" designation indicates it is impact tested at 20°C, making it suitable for general structural applications in moderate-temperature environments. Channel steel is widely used in building frameworks, industrial sheds, bridges, and heavy machinery components.
What are the mechanical properties of S355JR Channel Steel?
S355JR Channel Steel provides a minimum yield strength of 355 MPa and a tensile strength ranging from 470 to 630 MPa, depending on the section and thickness. It has good ductility, allowing it to absorb stresses without sudden failure, and exhibits reliable toughness suitable for welded and fabricated structures.
How does S355JR Channel Steel perform under welding?
Due to its low carbon equivalent, S355JR Channel Steel is easily weldable using standard welding processes such as SMAW, GMAW, or FCAW. However, for thicker sections or highly restrained joints, controlling heat input and following proper welding procedures is recommended to prevent residual stress buildup or softening in the heat-affected zone (HAZ).
Why is impact toughness important for S355JR Channel Steel?
Impact toughness prevents brittle fracture under dynamic or sudden loads. S355JR has been tested at 20°C to ensure it can withstand normal operational stresses. For projects in colder climates, other grades like S355J0 or S355J2 may be selected for lower-temperature impact requirements.
How does S355JR Channel Steel compare with other structural steels?
Compared with S275JR, S355JR offers higher yield strength, allowing lighter sections and reduced material usage while maintaining structural integrity. Compared to high-strength quenched-and-tempered steels like S690, S355JR is easier to fabricate and weld, though it has lower maximum strength, making it more cost-effective for general construction applications.
What are the typical applications of S355JR Channel Steel?
S355JR Channel Steel is commonly used in building frames, bridges, industrial equipment, machinery bases, and infrastructure projects. Its combination of strength, weldability, and toughness ensures safety and durability in a wide range of structural and engineering applications.