S355JR And 355J0 Universal Beam
Products Description
The UB 457×191×161 Universal Beam manufactured from S355JR or S355J0 structural steel is a heavy-duty steel H-beam section widely used in large structural frameworks, bridges, and industrial buildings.
S355JR And 355J0 Universal Beam
Produced according to EN 10025-2 structural steel standard, this beam provides a minimum yield strength of 355 MPa and excellent structural reliability for load-bearing applications.
Compared with lighter sections, the 457×191×161 UB beam offers higher bending capacity and stiffness, making it suitable for long-span structural members and high-load engineering projects.
S355JR vs S355J0 – Impact Toughness Difference
Both grades belong to the S355 structural steel family, but their impact test temperature determines the environments where they are used.
| Grade | Impact Test Temperature | Impact Energy | Typical Applications |
|---|---|---|---|
| S355JR | +20°C | ≥27 J | Standard structural engineering |
| S355J0 | 0°C | ≥27 J | Structures in cooler climates |
The lower test temperature of S355J0 ensures better toughness in moderate cold environments or structures exposed to dynamic loads.
S355JR
S355J0
UB 457×191×161 Universal Beam Dimensions
| Parameter | Value |
|---|---|
| Section Type | Universal Beam (UB) |
| Overall Depth (h) | 457 mm |
| Flange Width (b) | 191 mm |
| Web Thickness (tw) | ≈ 11.5 mm |
| Flange Thickness (tf) | ≈ 19 mm |
| Theoretical Weight | 161 kg/m |
Dimensional tolerances comply with EN 10034 structural beam standards.
Sectional Properties of S355JR And 355J0 Universal Beam
Structural engineers typically require detailed section properties when selecting beam sizes.
| Property | Value |
|---|---|
| Cross Section Area | ≈ 205 cm² |
| Moment of Inertia Ix | ≈ 72,000 cm⁴ |
| Moment of Inertia Iy | ≈ 4,300 cm⁴ |
| Section Modulus Zx | ≈ 3,150 cm³ |
| Radius of Gyration rx | ≈ 18.7 cm |
| Radius of Gyration ry | ≈ 4.6 cm |
These properties ensure excellent bending resistance and structural stability in heavy load-bearing systems.
Chemical Composition
| Element | Content |
|---|---|
| Carbon (C) | ≤0.22% |
| Silicon (Si) | ≤0.55% |
| Manganese (Mn) | ≤1.60% |
| Phosphorus (P) | ≤0.025% |
| Sulfur (S) | ≤0.025% |
The relatively low carbon content ensures good weldability and fabrication performance.
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | ≥355 MPa |
| Tensile Strength | 470–630 MPa |
| Elongation | ≥21% |
| Impact Energy (S355JR) | ≥27 J at +20°C |
| Impact Energy (S355J0) | ≥27 J at 0°C |
These properties ensure reliable performance under static loads, cyclic stresses, and structural vibrations.
Processing & Fabrication Options
To support engineering projects, UB beams can be supplied with additional processing services:
- Precision length cutting
- CNC drilling and fabrication
- Shot blasting (Sa2.5 surface preparation)
- Anti-corrosion coating
- Hot-dip galvanizing
These services help reduce fabrication work at the construction site.
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