The UB914×419×343 S355JR H-beam, with a sectional height of up to 914 mm and a yield strength of 355 MPa, serves as a crucial backbone in large-scale building structures and industrial constructions.
UB914×419×343 S355JR H-beam
Its distinctive cross-sectional shape, standardized dimensions, and reliable mechanical properties support vast spans and bear heavy loads with confidence.
Understanding the UB914×419×343 S355JR H beam
British Standard H-section steel is mainly divided into UB (Universal Beam) and UC (Universal Column) categories. The UB series is primarily used as bending members, commonly referred to as primary or secondary beams.
- 914 indicates the total height (H) of the beam in millimeters. This vertical dimension of the cross-section determines the beam's vertical stiffness and is a key factor in its bending resistance.
- 419 represents the flange width (B) in millimeters. The flanges are the parallel top and bottom parts of the H-beam and provide bending resistance. Wider flanges resist bending moments more effectively.
- 343 denotes the theoretical weight per meter, approximately 343 kg. This value is calculated based on the standard cross-section and steel density and is critical for load calculations, cost estimation, and lifting during construction.
UB914×419×343 S355JR H beam
The UB914×419×343 describes a heavy hot-rolled H-beam with nearly one meter in height, over 400 mm wide flanges, and substantial weight per meter. It is typically applied in critical positions requiring extremely high load-bearing capacity and long spans.
S355JR is a steel grade defined under the European Standard EN 10025-2, providing key information about mechanical properties and toughness.
- S stands for Structural Steel, indicating its intended use in load-bearing structures.
- 355 denotes the minimum yield strength of 355 MPa, the stress at which the material begins significant plastic deformation. This high yield strength ensures the steel can bear heavy loads without permanent deformation.
- J and R are quality grade indicators related to impact toughness:
J requires the steel to have at least 27 Joules of impact energy at room temperature (+20°C) in the Charpy V-notch test, ensuring good resistance to brittle fracture under normal conditions.
- R further ensures the steel meets higher guaranteed impact energy values at room temperature, with stricter limits on harmful elements like phosphorus and sulfur, which also improves weldability.
UB914×419×343 S355JR H beam
S355JR is a structural steel that combines high strength, excellent room-temperature toughness, and good weldability, making it suitable for complex stress conditions and welded structures.
Key Features and Engineering Advantages of S355JR Structural Steel Beams
| Feature / Advantage | Description | Engineering Impact |
|---|---|---|
| High Section Modulus & Moment of Inertia | With its massive cross-sectional height and flange width, the UB914×419×343 offers extremely high section modulus and moment of inertia. | Enables long, unsupported spans of tens of meters or more, with superior bending resistance and lateral stability. |
| Excellent Strength-to-Weight Ratio | High yield strength of S355JR allows material optimization or reduced steel usage while achieving the same load capacity. The H-section distributes material away from the neutral axis for maximum mechanical efficiency. | Efficient use of material; lighter yet strong beams for large spans. |
| Outstanding Stability & Connection Convenience | Wide flanges provide strong lateral support. Flat flange and web surfaces simplify connections to columns, secondary beams, and braces via welding or high-strength bolts. | Reliable, clear-force-transfer nodes; easier on-site assembly. |
| Balanced & Reliable Material Performance | S355JR steel ensures sufficient toughness under static and dynamic loads, stress concentrations, and welded zones. | Reduces risk of brittle failure; enhances structural redundancy and overall safety. |
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As a trusted manufacturer of S355JR H-section steel, we provide UB914×419×343 S355JR H beams in full stock and a variety of sizes to meet your project needs. Contact us today for a free quote and secure the steel backbone your project deserves.
Our UB914×419×343 S355JR H beams are made from high-performance structural steel, combining 355 MPa yield strength with exceptional toughness.
The beams are manufactured with strict dimensional tolerances according to EN 10034 standards, including ±3 mm on height and flange width, ±5% on theoretical weight, and precise straightness and flatness control to ensure reliable installation and structural performance.
Is S355 equivalent to A36?
S355JR and A36 are not directly equivalent, as S355JR has higher strength (yield 355 MPa vs. A36's 250 MPa) and guaranteed impact toughness, making it closer to ASTM A572 Grade 50 than A36. A36 is often equivalent to S235JR (yield 235 MPa), a lower EN grade.
What is the American equivalent of S355 steel?
ASTM has identified A572-50 as an acceptable substitution for S355. Both grades have similar chemical compositions and are high-strength, low-alloy structural steels.
Can S355 be hardened?
S355 is not ideally suited to hardening, though it can be subjected to limited heat treatment process such as case hardening.
What is the difference between ASTM A572 and S355?
Applications: ASTM A572 Grade 50 is commonly used in heavier construction applications requiring higher strength, while S355JR is versatile and widely used in various structural applications across Europe.