What are the main material differences between S355JR and S235JR?
S235JR has a minimum yield strength of 235 MPa, which decreases with increasing thickness. Compared to S235JR, S355JR steel has a minimum yield strength of 355 MPa. The tensile strength of S235JR ranges from 360 MPa to 510 MPa, while that of S355JR ranges from 470 MPa to 630 MPa. S355JR has a higher tensile strength than S235JR. Both S235JR and S355JR are non-alloy structural steels. They are both composed of iron and carbon; the difference lies in the slightly higher carbon and manganese content of S355JR.
What are the characteristics of high-frequency welding technology?
The main characteristic of high-frequency (HF) welding is that it utilizes an electromagnetic field to generate heat within the material, thereby achieving rapid, precise, and strong welding.
What are the main engineering projects using S355JR high-frequency resistance welded pipe?
S355JR high-frequency resistance welded pipe is mainly used in civil engineering and construction projects, including building frames, bridges, and underground structures. They are also used in the petrochemical and municipal engineering industries, such as pipelines, scaffolding, and structural components for machinery and vehicles.
What is the typical wall thickness range for S355JR high-frequency resistance welded pipe?
The typical wall thickness range for S355JR high-frequency resistance welded (HFRW) pipe is between 1.0 mm and 20 mm, though specific ranges can vary depending on the manufacturer and the pipe's outer diameter.
Is the price of S355JR high-frequency resistance welded pipe higher or lower than that of spiral welded pipe?
The price of an S355JR high-frequency resistance (HFR) welded pipe is lower than that of a spiral welded pipe, as the HFR welded pipe is generally less expensive per unit of weight. While both are welded pipes, spiral welding can have higher production costs and size limitations compared to high-frequency resistance welding.
