Transformation: Hot-rolled steel used for windows and doors is processed by heating steel above its recrystallization temperature and then rolling it into shape, resulting in a strong, durable material with a uniform finish. It’s known for its excellent structural integrity and is often called “HR steel” or “rolled steel” by architects. Hot-rolled steel profiles provide exceptional strength and durability while maintaining a sleek, industrial look. The hot-rolling process ensures a smooth surface and precise dimensions, which enhances the profile’s ability to withstand structural loads and resist deformation, making it ideal for high-performance windows and doors.