TSTE355 is a type of high-strength low-alloy (HSLA) steel. It is a thermomechanically rolled fine-grain steel that conforms to the DIN 17102 standard. TSTE355 has a specified minimum yield strength of 355 MPa, which makes it an ideal choice for use in applications that require high strength and good ductility. This material is typically used in pressure vessels, boilers, pipelines, and other heavy-duty components that require high-temperature stability and good resistance to corrosion and wear. Additionally, TSTE355 is known for its good weldability, making it suitable for fabrication and welding processes.