Basic Info.
Application
Electronics, Industrial
Standard
JIS, GB, DIN, ASTM
Treatment
Hydrogen Annealing
Tensile Strength, Ultimate, Annealed
827 MPa
Density ( @ 20.0° C/ 68.0° F)
8.10 G/Cm
Conductor Material
Ni-Cr-Al-Fe
Resistance
800 Ohm-CIR-Mil/FT or 0.000134 Ohm-Cm
Composition
Nickel: 75%, Chromium 20%, Aluminium: 2.5%, Copper
Transport Package
Carton Box
Specification
Base on customers′ request
Product Description
1. Karma alloy
Karma alloy is made up of copper, nickel, Aluminum and Iron as the main components. The resistivity is 2~3 times higher than MENTONG. It has lower temperature coefficient of resistance(TCR), lower thermal EMF versus copper, good permanence of resistance for a long period of time and strong anti oxidation. Its working temperature
range is wider than MENTONG (-60~300ºC). It is suitable for making fine precision resistance elements and strain.
2. Karma size
Wire: 0.018mm-10mm
Ribbon: 0.05*0.2mm-2.0*6.0mm
Strip: 0.5*5.0mm-5.0*250mm
Bar: 10-100mm
3.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.
Address:
No. 536 Laolu Road, Laogang Town, Pudong District, Shanghai, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Industrial Equipment & Components, Metallurgy, Mineral & Energy
Management System Certification:
ISO 9001, ISO 9000, ISO 20000
Company Introduction:
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.