98.3---99.9% MgO Magnesia ceramic pipes tubes pin rod for cartridge
heater
Description:
1) The product is ued in controllable aural various heat treatment
furnace,to avoid the contact of elding burning outcome or to avoid
the corrosion of furnace gas to heating element.The process(the
conversion of elding burning or electric energy) is put into
refractory steel tube and let amount of heat radiate by wall of
tube.This device is called as heater tube.
2) Electrothermal heater tube will close the heating element in the
jacket,after electrify and heat up,the heat is indirectly radiated
to furnace liner and workpiece to be heated by bushing.The heat up
of heater tube is used in furnace with going protecting aural and
corrodent aural,such as continuous furnace,roller furnace, pit
furnace.
..
Specification:
The material of tube:
The electrothermal alloy material that heating tube apply should be
of higher resistance rate.The percent conversion of galvanothermy
is high.Because the heating tube is put in the bushing,the process
of heat transmission is different from that of open type heating
element.Its heat shield is big.The temperature of element must be
controlled at the course of temperature rise,to avoid temperature
excursion of element.
When the heater tube is closed and heated,the surface temperature
of heating element is higher roughly than temperature of hearth by
100 C~150 C.So temperature of furnace and atmosphere of temperature
of furnace are needed to analysed.Choose correct heating material.
The heater tube produced by gongtao company often apply
Cr20Ni80,Cr25A15,Cr21A16Nb,Cr27A17Mo2 ect.
Chemical content of each material is as below:
| Item | Cr | Ni | AI | Mn | P | S | C | Fe |
| Cr20Ni80 | 20-23 | margin | ≤0.5 | ≤0.6 | ≤0.02 | ≤0.02 | ≤0.08 | ≤1.0 |
| Cr25A15 | 23-26 | ≤0.06 | 4-7 | ≤0.07 | ≤0.02 | ≤0.02 | ≤0.06 | margin |
| Cr21A16Nb | 21-23 | ≤0.06 | 5-7 | ≤0.07 | ≤0.02 | ≤0.02 | ≤0.05 | margin |
| Cr27A17Mo2 | 26-28 | ≤0.06 | 5-7 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.05 | margin |
Component:
--Material: Alumina,Steatite,Cordierite,Mullite
--Can be made according to customers' drawing
--Chemically inert, anti-acid, anti-alkaline
--Superior reliability and durability
--Excellent resistance to heat. Maintain the mechanical strength in
high temperature circumstances.
