This mild steel channel is a C-section structural profile produced to defined dimensional and performance requirements. It provides excellent weldability and machinability, allowing for efficient fabrication and machining operations.
However, it exhibits limited formability, making it less suitable for extensive bending, and poor corrosion resistance, meaning additional surface protection is recommended for exposed environments.
Supplied in a Mill Finish, the channel has a standard, untreated surface without any protective coating. Manufactured from S275JR grade mild steel, it meets the strength and quality requirements commonly specified for general structural and engineering applications.
The section has an overall height of 38 mm, width of 51 mm, and thickness of 5.8 mm. Both the leg thickness and base thickness measure 7 mm, and the unit weight is 5.8 kg per metre, offering a compact yet structurally reliable profile.
Specifications
| Property | Value |
|---|---|
| Material | Mild Steel |
| Grade | S275JR |
| Shape | Channel (C-section) |
| Finish | Mill Finish |
| Corrosion Resistance | Poor |
| Formability | Poor |
| Weldability | Excellent |
| Machinability | Excellent |
| Height | 38 mm |
| Width | 51 mm |
| Thickness | 5.8 mm |
| Leg Thickness | 7 mm |
| Base Thickness | 7 mm |
| Weight per Metre | 5.8 kg |
| Maximum Cut Length | 6 metres |
Q1: What is an S275JR steel channel?
An S275JR steel channel is a structural channel section manufactured in accordance with EN 10025-2. It is typically supplied in U-channel or C-channel shapes and provides a minimum yield strength of 275 MPa for general structural applications.
Q2: Which standard applies to S275JR channel steel?
S275JR channel steel is governed by EN 10025-2, which specifies the chemical composition, mechanical properties, impact toughness, and delivery conditions for hot-rolled structural steels.
Q3: What mechanical properties does S275JR channel steel offer?
S275JR channel steel provides a minimum yield strength of 275 MPa, a tensile strength range of approximately 410–560 MPa, and good elongation, ensuring reliable performance in moderate load-bearing structures.
Q4: What does the "JR" designation mean for S275JR channels?
The "JR" designation indicates a minimum impact energy of 27 J tested at +20°C, confirming sufficient toughness for use in normal ambient temperature conditions.
Q5: How does S275JR channel steel compare with S355JR channel steel?
Compared with S355JR, S275JR channel steel has lower yield strength but offers better cost efficiency for applications with moderate structural loads. It is often selected when economic considerations and fabrication simplicity are priorities.
Q6: Is S275JR channel steel suitable for welding?
Yes, S275JR channel steel has excellent weldability due to its low carbon content and controlled carbon equivalent. Standard welding processes can be used without special preheating for most thickness ranges.
Q7: Can S275JR channels be used in bolted or riveted connections?
S275JR channels perform well in bolted and riveted connections. Their stable mechanical properties ensure reliable load transfer when designed in accordance with structural engineering standards.
Q8: What types of channel sections are available in S275JR?
S275JR is commonly supplied in UPN channels, UPE channels, and parallel flange channels. Section availability depends on mill rolling capability and regional specifications.
Q9: What are typical applications of S275JR channel steel?
S275JR channel steel is widely used in steel frames, support structures, bracing systems, platforms, equipment frames, stair stringers, and light industrial or commercial construction.
Q10: Is S275JR channel steel suitable for low-temperature service?
S275JR is intended for standard ambient temperature environments. For colder service conditions, grades such as S275J0 or S275J2 are recommended due to improved impact toughness at lower temperatures.
Q11: What surface condition is supplied for S275JR channels?
S275JR channel steel is typically supplied in the hot-rolled condition with mill scale on the surface. Optional surface treatments such as shot blasting, priming, galvanizing, or painting can be provided upon request.
Q12: What lengths and sizes are available for S275JR channel steel?
S275JR channels are commonly supplied in standard lengths such as 6 m or 12 m, with cut-to-length services available. Section sizes vary depending on channel type and production range.