high temperature ni70cr30 cr20ni80 nichrome wire resistance by factory

• Product Type: Wire
• Material: nickel Chrome
• Carbon Content: Low Carbon
• Transport Package: Wooden Case
• Specification: negotiable
• Trademark: TANKII
• Model NO.: ni70cr30
• Origin: Shanghai
• Production Capacity: 3000 Tons/Year

Product Description

high temperature ni70cr30 cr20ni80 nichrome wire resistance by factory
 

heat resistance wire is a type of high resistance electrical wire. The wire resists the flow of electricity, and converts the electrical energy into heat.

 

Nichrome, a non-magnetic alloy of nickel and chromium, is commonly used to make resistance wire because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.

The high nickel content, in combination with the high chromium content let the scaling temperature can reach to 1250ºC

Chrome Nickel wire was shaped by means of high speed automatic cooling machine of which the power capacity is controlled by computer, they are available as wire and ribbon(strip).

 

nichrome wire resistance Product forms and size range 

Nichrome Alloy Grade	Cr20Ni80,Cr20Ni30,Cr15Ni60,Cr20Ni35,Cr20Ni40
Form	Round wire,Flat wire,Strip,Bar,Spring shaped wire, Wave shaped strip,Radiant tube heater
Size	Wire: 0.030mm-10mm Ribbon: 0.05*0.2mm-2.0*6.0mm Strip: 0.5*5.0mm-5.0*250mm furnance spring wire according to customers requirement

 

nichrome wire resistance Features and advantages

1)The highest working temperature up to 1200 degree.

2)higher strength than iron chromium aluminum under high temperature

3)not easy to deform under high temperature

4)good plasticity

5)easy to repair,

6)high emissivity,

7)Non-magnetic

8)strong corrosion resistance,

9)long service life

 

Uses of nichrome wire

Chrome nickel wire resistance is widely used for making electric heating elements in home appliances and industrial furnaces.,various electrical resistors and locomotive braking resistor, infrared equipment, liquefied gas infrared heat-resisting net, different kinds of igniting and radiating electrodes and voltage-regulating resistors for motors and so on in Metallurgical machinery

 

nichrome wire resistance Main characteristics

Type		Cr20Ni80	Cr15Ni60	Cr30Ni70	Cr20Ni35	Cr20Ni30
Main chemical composition	Ni	Rest	55.0~61.0	Rest	34.0~37.0	30.0~34.0
	Cr	20.0~23.0	15.0~18.0	28.0~31.0	18.0~21.0	18.0~21.0
	Fe	≤1	Rest	≤1	Rest	Rest
Max Temperature(ºC)		1200	1150	1250	1100	1100
Resistance Temperature correction coefficient.(CT)		1.09±0.05	1.11±0.05	1.18±0.05	1.04±0.05	1.06±0.05
Melting point (ºC)		1400	1390	1380	1390	1390
Resistivityρ20ºC(10-6Ω.m)	800ºC	1.008	1.078	1.028	1.188	1.173
	1000ºC	1.014	1.095	1.033	1.219	1.201
	1200ºC	1.025		1.043
Fast life value	Tem.(ºC)	1175	1100	1200	1050	1050
	hour(h)	≥110	≥100	≥110	≥100	≥100
Specific gravity(g/cm3)		8.40	8.2	8.1	7.90	7.90
Elongation(%)		≥25	≥25	≥20	≥20	≥20
Thermal(kj/m.h.ºC)		60.3	45.2	45.2	43.8	43.8
Specific heat(20ºC)j/g.ºC		0.440	0.494	0.461	0.500	0.500
Extend strength(20~1000ºC)α*10-6ºC		18.0	17.0	17.1	19.0	19.0
Tensile strength(kg/mm2)		>85	>85	>85	>85	>85
Repeatedly bending(F/R)		>12	>12	>12	>12	>12
Microstructure		Austenitic	Austenitic	Austenitic	Austenitic	Austenitic

  

 

nichrome wire resistance Notice

Resistance electric heating wire has strong antioxidant properties, but a variety of gases in furnaces such as air, carbon, sulfur, hydrogen and nitrogen atmosphere, still have a certain impact on it.

 

Although these heating wires all have had antioxidant treatment, the transportation, winding, installation and other process will cause damage to a certain extent and reduce its service life.

 

In order to extend the service life, customers need to do pre oxidation treatment before using. The method is to heat alloy elements which have installed completely in the dry air to the temperature (lower 100-200C than its maximum using temperature), heat preservation for 5 to 10 hours, then cooling slowly with furnace.

 

Pictures of nichrome wire resistance