Nichrome alloy wire for vacuum coating application

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Description

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

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