Hot Rolled S275JR Carbon Steel Flat Bars are widely used structural steel products designed for building construction, fabrication, and general engineering applications.
Produced in accordance with EN 10025-2, S275JR is a non-alloy structural steel grade known for its balanced strength, good weldability, and excellent cost performance, making it one of the most popular flat bar materials in the European and international markets.
The hot rolling process gives S275JR flat bars uniform mechanical properties, stable dimensions, and good surface quality, ensuring reliable performance in both load-bearing and fabrication-intensive projects.
Material Properties of S275JR Flat Bars
S275JR steel offers a minimum yield strength of 275 MPa, which provides sufficient structural strength for most building and fabrication uses. At the same time, its low carbon content improves weldability and forming performance, allowing the flat bars to be easily cut, drilled, bent, or welded without cracking or loss of strength.
Typical mechanical properties of S275JR flat bars include:
Yield strength: ≥ 275 MPa
Tensile strength: 410 – 560 MPa
Elongation: ≥ 23%
Impact test (JR): 27 J at +20°C
These properties make S275JR an ideal steel for frames, supports, brackets, base plates, and structural components where both strength and toughness are required.
Chemical Composition and Weldability
S275JR is a non-alloy carbon structural steel, with controlled amounts of carbon, manganese, silicon, phosphorus, and sulfur. This composition ensures:
Good weldability without the need for preheating in most cases
Stable mechanical performance after cutting or fabrication
Low risk of brittle fracture
Because of these characteristics, S275JR flat bars are widely used in construction sites, steel workshops, and mechanical fabrication plants.
Hot Rolled S275JR Flat Bar Manufacturing
Hot rolled S275JR flat bars are produced by rolling steel billets at high temperature. This process provides:
Better internal structure
Uniform strength distribution
High dimensional stability
Good surface finish
After hot rolling, the flat bars can be supplied in standard lengths (6 m, 12 m) or cut to size according to customer requirements. Surface treatments such as black, pickled, shot-blasted, or primed can also be applied when required.
Why Choose S275JR Carbon Steel Flat Bars
Compared with higher alloy or higher strength steels, S275JR offers a more economical solution while still meeting most structural requirements. Its easy processing, reliable mechanical performance, and wide availability make it a standard choice in the global steel market.
Whether for new building construction, equipment manufacturing, or steel fabrication, Hot Rolled S275JR Carbon Steel Flat Bars provide a durable, weldable, and cost-effective material solution.
What is material S275JR?
S275JR grade steel is a readily weldable low carbon manganese steel with good impact resistance. This material is commonly supplied in the untreated or normalised condition. Machinability of this material is similar to that of mild steel.
What is S275JR steel equivalent to?
Carbon Steel Grade Equivalents
| American ASTM / ASME / SAE | Europe EN | France NF |
|---|---|---|
| SAE1020 | C20E | |
| S275JR | E28-2 | |
| S275JR | E28-2 | |
| SAE1035 | C35E | XC38 |
What is the difference between S355JR and S275JR?
As to S275JR VS S355JR, actually they are totally not same thing. S275JR is carbon steel, while S355JR is low alloy steel. Both carbon steel S275JR and S355JR low alloy steel are under EN10025-2 standard. The S355JR low alloy steel is higher steel grade than carbon steel S275JR.
Is S275JR hot rolled?
The 2500 x 1250 x 6mm Hot Rolled Plate – S275JR is a structural steel plate produced to BS EN 10025-2 standards. Manufactured using the hot rolling process, this plate offers excellent formability, weldability, and strength, making it suitable for a wide range of fabrication and structural applications.
What does S235JR stand for?
The letter S stands for that the steel plate is structural. The number 235 indicates steel's yield strength. The letter JR means that the steel grade has undergone a Charpy impact test and is of high quality. The S235JR is a specification given to it, with each symbol indicating something different.