Electric heating radiant tube filling by arrange U axial end of welding wire and ceramic racks, no block between inner core and outer protection casing, good heat dissipation.Nominal working temperature of 1000 degrees electric heating radiant tube, the material of resistance wire Cr20Ni80 or 0 cr21al6nb, surface temperature can reach 1200 degrees, use the electric heating radiant tube material the highest working temperature is 1000 degrees, brace is high alumina ceramic.Outer protective casing is cold drawn seamless thin-wall heat-resisting steel, material is cr25ni35si2 cr25ni20si2 1 or 1, the material is good high temperature oxidation resistance, high temperature creep strength is higher, has certain carburizing resistance, the radiant tube design and material selection safety coefficient is larger.Rated working temperature of 1200 degrees electric heating radiant tube, 0 cr27al7mo2 of resistance wire material, the surface of the working temperature can reach 1400 degrees, use the material of electric heating radiant tube short the highest working temperature is 1250 degrees, jade porcelain support frame is steel.Outer protective casing is cold drawn seamless thin-wall heat-resisting steel, material is Fe - Ni - Cr - Al - Re alloys, the material has high antioxidant capacity, 1300 degrees in oxidation atmosphere can work for a long time, short-term antioxidant 1360 degrees.Suitable for high temperature and low oxygen partial pressure and containing S, C environment work.The company design and manufacture of electric heating radiant tube, have high, medium and low temperature furnace with arbitrary selection and special atmosphere furnace with specifications.Outside the casing in a seamless high-temperature alloy tube and plate coil pipe, centrifugal cast pipe, special non-metallic carburizing casing resistance, etc.And according to the radiant tube heating element under the condition of all kinds of atmosphere and poor circulation, when using general resistance alloy not applicable cases.Company researchers developed a new kind of resistance alloy material for radiation tube.The material stable performance, high resistivity, temperature coefficient, adapt to the radiation tube heating element is used, with the use of the unique performance instead of the expensive imported materials.