This article introduces the main materials and structural components of electric heating tubes, including the outer shell (copper, iron, stainless steel), resistance wire (Fe-Cr-Al, Ni-Cr), filler material (magnesium oxide powder), terminal studs, sealing parts and accessories. It explains the function of each material and the selection basis for different working environments such as water heating, oil heating, corrosive liquid heating and high-temperature air heating. The article clarifies the working principle and material composition of electric heating tubes to help users understand product performance and application scenarios. Read More