NIckel Resistance Wires
Electric Resistance Heating wires or strips,
electro-thermal wires or strips,
Heating Wires

Nichrome Resistance Heating Wires

 

 

Nichrome wires or strips

  Cr20Ni80,Cr30Ni70,Cr20Ni35,Cr20Ni30,Cr15Ni60,etc.

 

TYPE 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 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.

Condition of Supply

NiCr alloys are available in following conditions:

 

Bright AnnealedOxidized AnnealedBright DrawnNominal CompositionAlloyNi%Mn%Fe%Si%Cr%C%NiCr 80:20NiCr 70:30NiCr 60:15NiCr 40:20NiCr 30:20NiCr 20:25

Bal.	Max 1.0	Max 1.0	1.00 - 1.50	19 - 21	Max 0.10
Bal.	Max 1.0	Max 1.0	1.00 - 1.50	28 - 32	Max 0.10
Min 57.0	Max 1.0	Bal.	1.00 - 1.50	14 - 17	Max 0.10
Min 37.0	Max 1.0	Bal.	1.80 - 3.00	18 - 22	Max 0.10
Min 28.0	Max 1.0	Bal.	1.80 - 3.00	18 - 22	Max 0.10
Min 18.0	Max 1.0	Bal.	1.00 - 1.50	23 - 27	Max 0.10

 

Properties

Alloy

Specific Resistance
(Electrical Resistivity)
(µΩ-cm)Density
(g/cm³)Linear Expansion Coeff.
Bet RT & 1000°C (10-6/K)Maximum Operating
Temperature of Element (°C)
(in air) NiCr 80:20 NiCr 70:30 NiCr 60:15 NiCr 40:20 NiCr 30:20 NiCr 20 :25

108	8.4	17.0	1200
118	8.2	17.0	1250
112	8.2	17.0	1100
105	7.9	19.	1050
104	7.9	19.0	1000
95	7.8	17.0	1000

For Resistance (in Ω/m) of any size, divide the above resistivity with
(cross-sectional area in mm² of that size x 100).

R (Ω/m) = Resistivity (µΩ-cm) / A (in mm²) x 100

Size Range

 

 WireStripRibbonDia (mm)12 – 0.05--Width (mm)-5 - 1000.5 – 5Thickness (mm)-0.5 – 3.50.15  &  AboveMechanical Properties at Room TemperatureAlloyNiCr 80:20 NiCr 70:30 NiCr 60:15 NiCr 40:20 NiCr 30:20 NiCr 20:25 Tensile strength
Min-Max (N/mm2)Elongation %
(L0=100 mm)

700-900	800-950	700-850	700-850	650-800	600-800
25-35	25-30	25-35	25-35	25-35	25-35

Note: Other Grades of Nickel-Chromium resistance alloys are also available. Please contact us for more information.

 

 

Chromel A, Nikrothal 80, N8, Nichrome V, HAI-NiCr 80, Tophet A, Resistohm 80, Cronix 80, Protoloy, Nikrothal 8, Alloy A, MWS-650, Stablohm 650, NCHW1 Nikrothal 70, Chromel 70/30, N7, Hytemco, HAI-NiCr 70, Balco, Tophet 30, Resistohm 70, Cronix 70, Stablohm 710 Chromel C, Nikrothal 60, N6, HAI-NiCr 60, Tophet C, Resistohm 60, Cronifer II, Electroloy, Nichrome, Alloy C, Nikrothal 6, MWS-675, Stablohm 675, NCHW2 Chromel D, Nikrothal 40, N4, Chromax, HAI-NiCr 40, Tophet D, Resistohm 40, Cronifer III, 35-20 Ni-Cr, Alloy D, Nikrothal 4, MWS-610, Stablohm 610,nichrome ribbon