European standard H-beam S235JR, S275JR and S355JR are all structural steel grades in the European standard (EN 10025). The following is a detailed introduction to these three high-quality carbon structural steels:

European standard H-beam S235JR is a low-carbon steel with a low carbon content of about 0.16~0.23%. At the same time, the content of impurity elements such as sulfur and phosphorus is also low, not more than 0.045% and not more than 0.045% respectively.

Mechanical properties: The yield strength is usually around 235MPa, and the tensile strength is between 440~590MPa. It has good plasticity and toughness.

S275JR

Chemical composition: The carbon content of S275JR is slightly higher, about 0.21~0.27%. At the same time, the content of impurity elements such as sulfur and phosphorus is also slightly higher, not more than 0.040% and not more than 0.040% respectively.

Mechanical properties: Yield strength is usually around 275MPa, and tensile strength is between 490~660MPa. It has high strength and hardness, and has good processing performance.

S355JR

Chemical composition: S355JR is a medium carbon steel with a high carbon content of about 0.28~0.34%. At the same time, the content of impurity elements such as sulfur and phosphorus is also relatively low, not more than 0.040% and not more than 0.040% respectively.

Mechanical properties: Yield strength is usually around 355MPa, and tensile strength is between 590~760MPa. It has high strength and hardness, as well as excellent toughness and welding performance.

2. Application scenarios

S235JR

Due to its low-carbon chemical composition and good welding and machining properties, S235JR is widely used in building structures with low load requirements, such as bridges, building frames, etc.

S275JR

In the construction industry, S275JR is suitable for structural parts with medium load requirements, such as heavy industrial plants and foundations of high-rise buildings.

S355JR

In structural parts with high load requirements, such as large bridges, high-rise buildings, ships and heavy machinery, S355JR is more widely used.

3. Summary

European standard H-shaped steel S235JR, S275JR and S355JR have their own characteristics in chemical composition, mechanical properties and application scenarios. Users can choose the appropriate material according to specific needs to meet the design requirements and use environment of different projects. These materials also have good corrosion resistance, seismic resistance, and easy processing and installation, which are ideal for various construction projects.