The S275JR channel steel is a widely used structural steel product known for its excellent balance of strength, toughness, and fabrication performance. Manufactured in accordance with EN 10025-2, S275JR is a non-alloy structural steel grade designed for load-bearing applications in construction, infrastructure, and industrial engineering.
With a minimum yield strength of 275 MPa, S275JR channel steel provides higher strength compared to S235JR, while still maintaining very good weldability and formability. This makes it suitable for complex steel structures where reliability, safety, and ease of processing are essential.
S275JR channels are commonly applied in buildings, bridges, industrial frameworks, machinery structures, and transportation-related projects, offering dependable performance under both static and dynamic loads.
Key Characteristics of S275JR Channel Steel
Higher Structural Strength
S275JR offers improved yield strength, enabling it to handle heavier loads and longer spans compared with lower-grade structural steels.
Excellent Weldability
The controlled carbon content allows easy welding using standard processes without preheating, reducing fabrication time and cost.
Good Formability & Machinability
Channels can be cut, drilled, bent, and shaped efficiently to meet specific project requirements.
Durability & Toughness
Suitable for applications exposed to vibration, repeated loads, and varying environmental conditions.
Cost-Effective Performance
Delivers strong mechanical properties while remaining economical for large-scale structural projects.
S275JR Channel Steel Specifications
| Item | Description |
|---|---|
| Product Name | S275JR Channel Steel |
| Material Type | Mild / Carbon Structural Steel |
| Standard | EN 10025-2 |
| Minimum Order Quantity | 1 Ton |
| Manufacturing Process | Hot rolled |
| Surface Finish | Black, Hot-dip galvanized, Painted, or as specified |
| Delivery Form | Standard lengths or customized |
S275JR Channel Size & Weight Reference
| Size (mm) | Average Weight (kg/m) | Average Weight (kg/ft) |
|---|---|---|
| 70 × 35 | 4.2 | 1.3 |
| 75 × 40 | 5.2 | 1.58 |
| 75 × 40 (STD) | 7.1 | 2.2 |
| 75 × 40 (MED) | 6.5 | 2.0 |
| 75 × 40 (LIGHT) | 5.7 | 1.7 |
| 100 × 50 (STD) | 9.56 | 2.9 |
| 100 × 50 (MED) | 9.2 | 2.8 |
| 100 × 50 (LT MED) | 8.7 | 2.6 |
| 100 × 50 (LIGHT) | 7.9 | 2.4 |
| 120 × 55 | 12.5 | 3.1 |
| 125 × 65 | 13.1 | 4.0 |
| 150 × 75 | 16.8 | 5.1 |
| 200 × 75 | 22.3 | 6.8 |
Note: Actual weight may vary slightly depending on rolling tolerance.
S275JR Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| EN | S275JR |
| ASTM | ASTM A36, ASTM A283 Grade C |
| DIN | St44-2 |
| JIS | SS400 |
| ISO | ISO 630-2:2011 S275B |
Chemical Composition of S275JR
| Element | Requirement |
|---|---|
| Carbon (C) | ≤ 0.21–0.22% (depending on thickness) |
| Manganese (Mn) | ≤ 1.50% |
| Phosphorus (P) | ≤ 0.035% |
| Sulfur (S) | ≤ 0.035% |
| Nitrogen (N) | ≤ 0.012% |
| Copper (Cu) | ≤ 0.55% |
Mechanical Properties of S275JR
| Nominal Thickness (mm) | Min Yield Strength (MPa) | Tensile Strength (MPa) |
|---|---|---|
| < 3 | 275 | 430 – 580 |
| ≥ 3 ≤ 16 | 275 | 410 – 560 |
| > 16 ≤ 40 | 265 | 410 – 560 |
| > 40 ≤ 63 | 255 | 410 – 560 |
| > 63 ≤ 80 | 245 | 410 – 560 |
| > 80 ≤ 100 | 235 | 410 – 560 |
| > 100 ≤ 150 | 225 | 400 – 540 |
| > 150 ≤ 200 | 215 | 380 – 540 |
| > 200 ≤ 250 | 205 | 380 – 540 |
| > 250 ≤ 400 | 195 | 380 – 540 |
Key Features & Benefits
High Strength & Structural Reliability
S275JR channel steel provides a strong combination of yield strength and toughness, ensuring safety and stability in load-bearing structures such as buildings and bridges.
Excellent Fabrication Performance
The material is easy to weld, bend, and machine, making it ideal for complex assemblies and prefabricated steel structures.
Environmental Adaptability
With proper surface treatment such as galvanizing or coating, S275JR channels can be used in outdoor and corrosive environments.
Cost-Efficient Solution
Compared with higher alloy structural steels, S275JR delivers strong mechanical performance at a competitive cost.
Standards Compliance
Fully compliant with EN 10025, ensuring consistent quality and acceptance in international engineering projects.
Applications of S275JR Channel Steel
Construction & Infrastructure
Building frameworks, columns, beams, and secondary supports
Bridges, flyovers, and heavy infrastructure components
Automotive & Transportation
Vehicle frames, trailers, and chassis structures
Railway and transportation support systems
Energy & Power Sector
Support structures for solar panels and wind turbines
Industrial power plant frameworks
Commercial & Industrial Facilities
Storage racks, shelving systems, and industrial platforms
Machinery frames and equipment supports
Public Utilities & Civil Engineering
Street lighting poles and signage supports
Water treatment plants, storage tanks, and utility structures
