The quality of raw materials has a significant impact on the performance of channel steel. High - quality steel billets with proper chemical composition and purity can ensure that the channel steel has good mechanical properties, such as high strength, good ductility, and corrosion resistance. For example, if the raw materials contain excessive impurities like sulfur and phosphorus, it will reduce the strength and toughness of the channel steel, and may also cause problems such as hot - shortness and cold - brittleness. Therefore, strict control of raw material quality is essential for producing high - performance channel steel.