... materials.2.The cracking furnace, conversion furnace, heating equipment, refining equipment, reproduction equipment, hot blast stove, heating furnace, even-heating furnace, heat-processing furnace,resisitance furnace, tunnel kiln, shuttle ... .5~0.8Tensile strength (Mpa)1.1-4.8Expansion on heating (1000C)(%)0.5-0.6Thermal conductivity(350C)(W/m.k ...