HEB steel is produced in different grades, such as S235, S275, and S355, which significantly influence its mechanical performance. The grade number represents the minimum yield strength of the steel in megapascals (MPa). For instance, S235 grade HEB steel has a minimum yield strength of 235 MPa, suitable for applications with relatively low load requirements, like some light - duty industrial structures or interior building frames.
S275 grade HEB steel, with a minimum yield strength of 275 MPa, offers higher strength and is commonly used in medium - load applications, such as multi - story residential buildings and smaller commercial structures. S355 grade HEB steel, having a minimum yield strength of 355 MPa, is designed for heavy - duty applications, including large - scale industrial plants, high - rise buildings, and bridges. Higher - grade HEB steel also generally has better tensile strength, fatigue resistance, and ductility, making it more suitable for structures subjected to dynamic loads and harsh environmental conditions.
