Nickle chrome alloy description
NiCr 80: 20 Industrial furnaces (upto 1200° C), electric cooking equipment, precision resistors.
NiCr 70: 30 Industrial furnaces (upto 1230° C) with alternating oxidizing/reducing atmosphere, precision resistors.
NiCr 60: 15 Industrial furnaces (upto 1100° C), electrically heated equipment, high-resistance and potentiometer resistors.
NiCr 40: 20 Domestic heating appliances (upto 1050° C), furnaces in carburising or semi-reducing atmosphere.
NiCr 30: 20/ NiCr 20: 25 Industrial furnaces (upto 1050° C), heating elements of cooking equipment.
|
Property
|
Cr15Ni60
|
Cr20Ni80
|
Cr20Ni30
|
|
Main Chemical Composition(%)
|
15-18
|
20-23
|
18-21
|
|
55-61
|
Rest
|
30-34
|
|
Rest
|
--
|
Rest
|
|
Max continuous service Temp.of elements
|
1100
|
1150
|
1100
|
|
Density(g/cm3)
|
8.2
|
8.4
|
7.9
|
|
Melting point(approx )
|
1390
|
1400
|
1390
|
|
Elongating(%)
|
20
|
20
|
30
|
|
Resistivity at 20
|
1.12-1.15±0.05
|
1.09-1.14±0.05
|
1.04-1.06±0.05
|
|
Micrographic structure
|
Austenite A
|
Austenite A
|
Austenite A
|
|
Alloy
|
Ni%
|
Mn%
|
Fe%
|
Si%
|
Cr%
|
C%
|
|
NiCr 80:20
|
Bal.
|
Max 1.0
|
Max 1.0
|
1.00 - 1.50
|
19 - 21
|
Max 0.10
|
|
NiCr 70:30
|
Bal.
|
Max 1.0
|
Max 1.0
|
1.00 - 1.50
|
28 - 32
|
Max 0.10
|
|
NiCr 60:15
|
Min 57.0
|
Max 1.0
|
Bal.
|
1.00 - 1.50
|
14 - 17
|
Max 0.10
|
|
NiCr 40:20
|
Min 37.0
|
Max 1.0
|
Bal.
|
1.80 - 3.00
|
18 - 22
|
Max 0.10
|
|
NiCr 30:20
|
Min 28.0
|
Max 1.0
|
Bal.
|
1.80 - 3.00
|
18 - 22
|
Max 0.10
|
|
NiCr 20:25
|
Min 18.0
|
Max 1.0
|
Bal.
|
1.00 - 1.50
|
23 - 27
|
Max 0.10
|
|
Alloy
|
NiCr 80:20
|
NiCr 70:30
|
NiCr 60:15
|
NiCr 40:20
|
NiCr 30:20
|
NiCr 20:25
|
|
Tensile strength
Min-Max (N/mm 2 )
|
700-900
|
800-950
|
700-850
|
700-850
|
650-800
|
600-800
|
|
Elongation %
(L 0 =100 mm)
|
25-35
|
25-30
|
25-35
|
25-35
|
25-35
|
25-35
|
