S355JR/355J0 UB 686x254x170 Structural Steel H-beam
The UB 686×254×170 H-beam made from S355JR or S355J0 structural steel is a heavy-duty universal beam widely used in large-scale structural engineering. Manufactured according to EN 10025-2, this high-strength steel beam provides excellent load-bearing capacity, weldability, and structural stability.
S355JR/355J0 UB 686x254x170 Structural Steel H-beam
With a minimum yield strength of 355 MPa and tensile strength ranging from 470–630 MPa, these beams are designed for demanding applications such as bridges, offshore structures, heavy machinery frames, and large-span buildings.
Our UB 686×254×170 structural H beams are produced using advanced hot-rolling technology and supplied with full Mill Test Certification (EN 10204 3.1), ensuring consistent quality for international engineering projects.
What is the difference between the S355JR And S355J0 H Beam
When selecting structural steel, engineers often need to determine whether S355JR or S355J0 is more suitable for the project environment.
| Grade | Impact Test Temperature | Impact Energy | Typical Environment |
|---|---|---|---|
| S355JR | +20°C | ≥27 J | Standard structural applications |
| S355J0 | 0°C | ≥27 J | Moderate cold climates |
The lower testing temperature of S355J0 ensures improved toughness in cooler environments and dynamic load structures.
S355JR H Beam
S355J0 H Beam
UB 686×254×170 H Beam Dimensions
| Parameter | Value |
|---|---|
| Section Type | Universal Beam (UB) |
| Overall Height | 686 mm |
| Flange Width | 254 mm |
| Web Thickness | ≈ 12.7 mm |
| Flange Thickness | ≈ 25.4 mm |
| Theoretical Weight | 170 kg/m |
Dimensional tolerances comply with EN 10034 for structural H-beams.
Chemical Composition of S355 H Beam
| Element | C | Mn | P | S |
|---|---|---|---|---|
| Max Content | ≤0.20% | ≤1.60% | ≤0.040% | ≤0.040% |
A relatively low carbon equivalent (CEV ≤0.45) ensures good weldability, making these steels suitable for complex welded structures.
Mechanical Properties of S355 H Beam
| Property | Value |
|---|---|
| Yield Strength (Re) | ≥355 MPa |
| Tensile Strength (Rm) | 470–630 MPa |
| Elongation | ≥22% |
| Impact Energy | ≥27 J |
These mechanical characteristics ensure reliable performance under static loads, cyclic stress, and moderate low-temperature environments.
What is the Production Process And Delivery Condition
Our UB structural beams are produced using continuous hot rolling technology, ensuring uniform mechanical performance across the entire section.
Typical delivery condition:
| Condition | Description |
|---|---|
| +AR | Hot rolled |
| +N | Normalized for improved toughness |
Normalizing treatment involves heating to 880–920°C followed by air cooling, which improves structural stability and fatigue resistance.
Structural Advantages of H-Beam Design
Balanced Bending Strength
The H-shaped cross-section distributes material efficiently, providing excellent bending stiffness in both directions. This makes UB beams ideal for long-span load-bearing structures.
Fatigue Resistance
For dynamic load structures such as cranes or offshore platforms, S355J0 beams offer improved fatigue performance, particularly after normalizing treatment.
Excellent Fabrication Performance
The beams support common fabrication processes including:
- Cutting
- Drilling
- Cold bending (minimum radius ≥ 3 × web thickness)
- Welding fabrication
Surface Treatment & Processing Services
To support engineering projects, we provide multiple processing options:
- Precision cutting to the required length
- Drilling and structural fabrication
- Shot blasting (Sa2.5 surface preparation)
- Anti-corrosion coating
- Hot-dip galvanizing
These services help reduce on-site fabrication work and accelerate project installation.
Typical Applications of UB 686×254×170 H-Beam
Offshore & Marine Structures
Used in offshore platform support frames and wind power tower connectors, where structural strength and corrosion protection are essential.
Heavy Industrial Equipment
Suitable for crane booms, metallurgical equipment frames, and heavy machinery bases, where the beam must withstand high impact loads.
Bridge Engineering
The high strength and stiffness of UB beams make them suitable as main girders or structural supports in large-span bridges.
High-Rise Construction
Frequently used as primary load-bearing beams or columns in large buildings and industrial facilities.
Quality Assurance & Export Packaging
To ensure consistent quality and traceability, all beams are supplied with complete documentation and inspection support.
✔ Mill Test Certificate (EN 10204 3.1)
✔ Third-party inspection available (SGS / BV / Intertek)
✔ Full chemical and mechanical testing records
Export packaging includes:
- Reinforced steel bundling
- Wooden spacers for lifting protection
- Anti-rust coating for sea transport
This ensures the beams remain in excellent condition even after long-distance shipping.
Contact now to get S355JR and S355J0 H Beam Quote
Looking for a reliable supplier of S355JR or S355J0 structural H-beams? Contact us today to:
- Receive a fast quotation within 24 hours
- Request a sample Mill Test Certificate
- Get detailed technical specifications
Our engineers will help you select the most suitable structural steel solution for your project.