0.08mm Enamelled NICR alloy NiCr20AlSi/nichrome Karma Resistance Heating resistor wire

• Customization: Available
• Insulation Level: H, F
• Certification: ISO9001, RoHS
• Model NO.: Karma
• Application: Transformer, Instrument, Electrical Equipment, Motor
• Shape: Round Wire
• Conductor Material: Alloy Wire
• standard: GB/ASTM/JIS/BIS/DIN
• colour: red, blue, yellow etc.
• surface: bright
• Resistivity: 1.33 ohm mm2/m
• Diameter: 0.02-8.0mm
• sample order: accepted
• Temperature: 155C, 180C, 200C,220C etc.
• Transport Package: Waterproof Paper, Wooden Case
• Specification: SGS
• Trademark: TANKII
• Origin: Shanghai
• HS Code: 75052200
• Production Capacity: 2000tons/Year

Product Description

Karma Enamelled Wire Dia 0.08mm Resistance Heating Wire for Precision Instrument

Product Description

These enameled resistance wires have been broadly used for standard resistors, automobile
parts, winding resistors, etc. using the insulation processing best suited for these applications, taking full advantage of the distinctive features of enamel coating.

Furthermore, we will carry out enamel coating insulation of precious metal wire such as silver and platinum wire upon order. Please make use of this production-on-order. 

Karma  Property

name	code	Main Composition (%)				Standard
		Cr	Al	Fe	Ni
Karma	6J22	19~21	2.5~3.2	2.0~3.0	bal.	JB/T 5328

 

Name	Code	(20ºC)  Resisti   vity (μΩ.m)	(20ºC)  Temp. Coeff.  Of Resistance  (αX10-6/ºC)	(0~100ºC)  Thermal   EMF vs.   Copper  (μv/ºC)	Max.workin        g Temp.(ºC)	(%) Elongati     on	(N/mm2)  Tensile  Strength	Standard
Karma	6J22	1.33±0.07	≤±20	≤2.5	≤300	>7	≥780	JB/T 5328

4. Distinctive features of Karma resistance wire

1) Starting with Nickel Chromium electric heat wire Class 1, we replaced some of the Ni with
Al and other elements, and thus achieved a precision resistance material with improved
resistance temperature coefficient and heat electromotive force against copper.
With the addition of Al, we have succeeded in making volume resistivity 1.2 times greater
than Nickel Chromium electric heat wire Class 1 and the tensile strength 1.3 times greater.

2) The secondary temperature coefficient β of Karmalloy wire KMW is very small, - 0.03 × 10-6/ K2,

and the resistance temperature curve turns out to be almost a straight line within a wide
temperature range.

Therefore, the temperature coefficient is set to be the average temperature coefficient between
23 ~ 53 °C, but 1 × 10-6/K, the average temperature coefficient between 0 ~ 100 °C, also may
be adopted for the temperature coefficient.

3) Electromotive force against copper between 1 ~ 100 °C is also small, below + 2 μV/K, and

exhibits excellent stability over a period of many years.

4) If this is to be used as a precision resistance material, low temperature heat treatment is
required to eliminate processing distortions just as in the case of Manganin wire CMW.

Type of Insulation

Insulation-enamelled Name	Thermal LevelºC (working time 2000h)	Code Name	GB Code	ANSI. TYPE
Polyurethane enamelled wire	130	UEW	QA	MW75C
Polyester enamelled wire	155	PEW	QZ	MW5C
Polyester-imide enamelled wire	180	EIW	QZY	MW30C
Polyester-imide and polyamide-imide double coated enameled wire	200	EIWH (DFWF)	QZY/XY	MW35C
Polyamide-imide enamelled wire	220	AIW	QXY	MW81C