Tube furnace tubes are typically made of materials such as stainless steel (0-1000°C), ceramics (1300-1700°C), silicon carbide (0-1400°C), or quartz glass (0-1150°C). These materials possess high temperature resistance and chemical corrosion resistance, making them suitable for various industrial and laboratory applications requiring high-temperature treatment or chemical reactions. The choice of material depends on factors such as the furnace tube's operating temperature, environmental corrosiveness, and mechanical strength to ensure safe operation and stable performance of the tube furnace.