The electric heating tube heating body is an electric heating wire, and the main ones are iron chromium aluminum and nickel chromium alloy wire. Iron-chromium-aluminum is relatively inexpensive, and iron-chromium-aluminum alloy wire is generally used in electric heating pipes which are not specifically described. Nickel-chromium alloy wire is more expensive. The difference between the two: the working temperature of the iron-chromium-aluminum alloy material can reach 1400 ° C, which is enough to meet the needs of electric heating tubes. However, nickel-chromium wire has good flexibility and good oxidation resistance, and iron-chromium-aluminum wire is relatively brittle. From this point, we can get one of the basic structures of electric heating tubes.