What is a hot-rolled steel bar?Hot-rolled steel bars are bars produced by rolling under high-temperature conditions. Common cross-sections include round bars, square bars, flat bars, and hexagonal bars. Compared to cold-rolled/cold-drawn bars, hot-rolled bars often have an oxide scale on their surface. They have wider dimensional tolerances, but exhibit uniform internal structure, stable mechanical properties, and are suitable for environments with large diameters and large d...