S355JR High Frequency Welded Tube
Product introduction of high frequency welded pipe
S355JR high-strength low-alloy steel strips are instantaneously fused together using high-frequency current to form a precise and robust straight seam weld. To ensure superior performance, an online normalizing treatment is required after welding. This process refines the weld grains, ensuring that its toughness and strength are seamlessly integrated with the base material, completely eliminating weak areas in the weld. Therefore, this product not only inherits the inherent advantages of S355JR steel's high yield strength of 355MPa and excellent room-temperature impact toughness, but also features high dimensional accuracy, smooth inner wall, and good dynamic load performance, making it perfectly suited for various demanding engineering applications, from heavy structural supports to mechanical drive shafts.
Post-weld treatment of S355JR high-frequency straight seam welded pipe
For S355JR high-frequency welded pipe, we strictly adhere to the critical process of online normalizing of the weld seam. This treatment, through medium-frequency induction heating, transforms the hardened microstructure formed during rapid cooling during welding back into uniform and refined grains, ensuring that the mechanical properties of the weld zone perfectly match those of the S355JR base material. This significantly eliminates welding stress, improves the impact toughness and fatigue strength of the weld seam, and ensures the uniformity of the overall pipe performance and the reliability of the structure during long-term service.
Advantages of S355JR High-Frequency Welded Pipe
| Features | Description and advantages |
|---|---|
| High welding speed | The production efficiency is extremely high, reaching tens of meters per minute, making it suitable for mass production. |
| small heat-affected zone | Due to rapid and concentrated heating, the thermal impact on the base material (S355JR) is minimal, preserving the original mechanical properties of the material to the greatest extent possible. |
| high weld quality | The weld is smooth, flat, and continuous, with few internal defects. |
| high dimensional accuracy | The outer diameter and wall thickness are precisely controlled, making it particularly suitable for subsequent machining and assembly. |
| no welding consumables required | The welding process does not use welding wire or flux; it relies on the fusion of the base material itself, resulting in lower costs and a purer weld composition. |
About us
We specialize in exporting high-quality S355JR high-frequency welded pipes. Our products strictly adhere to EN 10219 standards, and their core advantages lie in their precise manufacturing process and essential weld normalizing treatment. This ensures the steel pipes' superior dynamic load performance and global standard compliance. We are committed to providing your engineering projects with reliable materials that combine strength, toughness, and safety.
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