Nickel Chromium Nichrome 70 Ni70cr30/Nicr 70/30 resistance Wire for Heaters

Model NO.
NiCr 70/30
Grade
NiCr7030/Ni70Cr30/NiCr 70/30
Surface
Bright NiCr70/30 wire
craft
Annealing ribbon
Shape
round wire , Ribbon wire and strip
series alloy wires
ni80cr20/ni70cr30/ni60cr15/ni30cr20/ni20cr25
usage
heating element/resistance wire/household applianc
Purity
70%Ni
Standard
ASTM/GB/DIN
Resistivity
1.18 Ohm mm2/m
Transport Package
Packing in Coil Cartons, Pallet, Spools, Coils
Specification
in customers′ requirement
Trademark
TANKII
Origin
China
HS Code
75052200
Production Capacity
2000tons/Year
Reference Price
$ 23.40 - 25.20
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Product Description

Nickel Chromium Nichrome 70 Ni70cr30/Nicr 70/30 resistance Wire for Heaters

Common Name: Ni70Cr30, N7, HAI-NiCr70, Chromel70/30, Resistohm70, Balco, Tophet 30, Cronix 70, Alloy 710, Stablohm 710
 
Ni70Cr30 is a nickel-chromium alloy (NiCr alloy) characterized byHigh resistivity, good oxidation resistance,very good form stability,good ductility and excellent weldability. It is suitable for use at temperatures up to 1250°C.

Typical applications for Ni70Cr30 are used in electrical heating elements in industrial furnace,and well suited for reducing atmospheres. 

Properties/Grade
NiCr 80/20
NiCr 70/30
NiCr 60/15
NiCr 35/20
NiCr 30/20

Main Chemical Composition(%)
Ni
Bal.
Bal.
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
≤ 1.0
≤ 1.0
Bal.
Bal.
Bal.

Max Working Temperature(ºC)
1200
1250
1150
1100
1100

Resistivity at 20ºC
(μ Ω · m)
1.09
1.18
1.12
1.04
1.04

Density(g/cm3)
8.4
8.1
8.2
7.9
7.9

Thermal Conductivity
(KJ/m· h· ºC)
60.3
45.2
45.2
43.8
43.8

Coefficient of Thermal Expansion(α × 10-6/ºC)
18
17
17
19
19

Melting Point(ºC)
1400
1380
1390
1390
1390

Elongation(%)
> 20
> 20
> 20
> 20
> 20

Micrographic Structure
austenite
austenite
austenite
austenite
austenite

Magnetic Property
nonmagnetic
nonmagnetic
nonmagnetic
nonmagnetic
nonmagnetic

Product Description
G rade : Ni80Cr20 ,also called MWS-650,NiCrA,Tophet A,HAI-NiCr 80,Chromel A,Alloy A,N8,Resistohm 80, Stablohm 650,Nichorme V etc.

Chemical Content(%)

C

P

S

Mn

Si

Cr

Ni

Al

Fe

Other

Max

0.03

0.02

0.015

0.60

0.75~1.60

20.0~23.0

Bal.

Max 0.50

Max 1.0

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Mechanical Properties of nichrome wire

Max Continuous Service Temperature: 

1200 ºC

Resisivity 20 ºC :

1.09 ohm mm2/m

Density:

8.4 g/cm3

Thermal Conductivity:

60.3 KJ/m·h· ºC

Coefficient of Thermal Expansion:

18 α×10-6/ ºC

Melting Point:

1400 ºC

Elongation:

Min 20%

Micrographic Structure:

Austenite

Magnetic Property:

nonmagnetic

Temperature Factors Of Electrical Resistivity

20 ºC

100 ºC

200 ºC

300 ºC

400 ºC

500 ºC

600 ºC

1

1.006

1.012

1.018

1.025

1.026

1.018

700 ºC

800 ºC

900 ºC

1000 ºC

1100 ºC

1200 ºC

1300 ºC

1.01

1.008

1.01

1.014

1.021

1.025

-

Nickel Chromium Nichrome 70 Ni70cr30/Nicr 70/30 resistance Wire for Heaters
Nickel Chromium Nichrome 70 Ni70cr30/Nicr 70/30 resistance Wire for Heaters




 

 

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