Common material and dielectric characteristics and maximum operating temperature of electric heating element standards - Industry Knowledge

Common materials and dielectric characteristics and maximum operating temperature of electric heating element standards, data source: People's Republic of China Machinery Industry Standard JB/T2379-2016 "Metal Tubular Electric Heating Element"

5.1.5 Materials:

The materials used to manufacture components should be reasonably selected according to their use requirements, should consider the working conditions, and should meet the provisions of their quality standards.

Common materials for component metal tubes, their allowable media characteristics and maximum operating temperature See Table 1.

The highest allowable surface load of commonly used materials for component metal tubes in common media shall comply with the provisions of Table 2.

The insulation filler material should be selected according to the operating temperature of the component. When the working temperature T≤ 400 °C, fill low-temperature magnesium oxide powder; When the working temperature is 400 °C< T≤ 600 °C, fill with medium temperature magnesium oxide powder; When the working temperature is 600 °C< T≤850 °C, fill with high-temperature magnesium oxide powder. Brass exit rods shall not be used for components with a maximum temperature above 450°C or temperatures exceeding 450°C that may be encountered during their processing.

Operating conditions

Materials and their grades

remark

Heating medium and characteristics

Maximum permissible temperature °C

air

175

Copper T4

400

Carbon steel 10

550

Stainless steel 06Cr18Ni10(304)