or corrosive environments. The most common types of sheaths are 304 stainless steel, 316 stainless steel, and incoloy 800. Incoloy has the highest temperature rating and is considered a superalloy.

Sealing

After the cartridge heater has been filled with MgO, a seal is applied to the open end of the cartridge heater (where the nichrome coil was introduced). This prevents the coil and the MgO from coming out, as well as

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