... Conductivity High Spalling Resistance High Softening Temperature Furnace Al2O3 Alumina Ceramic Tubes High Purity ... steel continous temperature, various industrial furnace(containing vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in ... instrumentation, mechanical workout, military project etc industry.Furnace tube OD25~3031~4041~5051~6061~7071~8081~ ...