|
Main
Performance of Ni-Cr and Ni-Cr-Fe electric heating alloys
|
|
Cr20Ni80
|
Cr30Ni70
|
Cr15Ni60
|
Cr20Ni35
|
Cr20Ni30
|
|
Main
chemical
Comp-
osit-
ion
£¥
|
Ni
|
Rest
|
Rest
|
55.0~61.0
|
34.0~37.0
|
30.0~34.0
|
|
Cr
|
20.0~23.0
|
28.0~31.0
|
15.0~18.0
|
18.0~21.0
|
18.0~21.0
|
|
Fe
|
¡Ü1.0
|
¡Ü1.0
|
Rest
|
Rest
|
Rest
|
|
Max.continuous
service temp.of
element (¡æ)
|
1200
|
1250
|
1150
|
1100
|
1100
|
|
Melting point
(approx.) ¡æ
|
1400
|
1380
|
1390
|
1390
|
1390
|
|
Density
g/cm3
|
8.40
|
8.10
|
8.20
|
7.90
|
7.90
|
|
Resistivity
¦Ì¦¸.m,20¡æ
|
1.09
|
1.18
|
1.12
|
1.0
|
1.04
|
|
Elongation
%
|
¡Ý20
|
¡Ý20
|
¡Ý20
|
¡Ý20
|
¡Ý20
|
|
Thermal
conductivity
KJ/m.h.¡æ
|
60.3
|
45.2
|
45.2
|
43.8
|
43.8
|
|
Conefficient
of lineas
expansion
¦Á¡Á10-6/¡æ
|
18.0
|
17.0
|
17.0
|
19.0
|
19.0
|
|
Micrographic
structure
|
austenite
|
austenite
|
austenite
|
austenite
|
austenite
|
|
Magnetic
properties
|
non
magnetic
|
non
magnetic
|
non
magnetic
|
weak
magnetic
|
weak
magnetic
|
|
