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Resistance Alloys
( Electrical Resistance Alloys/Electrical Heating Alloys)

Overview

A resistive material is a material whose composition is adjusted so that it is difficult to conduct electricity (high electrical resistance) in metals.
They are mainly classified into two types: "materials for electric resistance" used for resistors, etc. and "materials for electric heating" used for heating elements, etc.

"Materials for electric resistancelimit the flow of current through metal resistance, and "materials for electric heating" are used to generate heat due to metal resistance when an electric current is applied.

We manufacture various types of resistor materials in small lots with high quality.

Examples of Applications

Various Resistors, Heaters, Heating Elements, etc.

Supported Shapes

It depends on material grade, so please confirm details on each material grade page.


Electrical Resistance Alloy

Lineup and Features

Please scroll horizontally to view.

 Alloy Type Typical Value Features 
Volume Resistivity
[μΩ・m]
TCR
[ppm/K]
Hardness
[HV] 
 Magnetism
 

NCH-1

Electrical resistance
nickel-chromium
alloys for general use
 1.08 50
[23-100℃]
 250 max None
  • High Resistivity
  • Good Heat Resistance, Corrosion Resistance, and Toughness
  • Low TCR
  • NCH-1 is superior to NCH-2
  •  Low Brazeability and Solderability
 

NCH-2

 1.12 150
[23-100℃] 
 250 max None

EVANOHM R®*1

-  1.33  About 25
[-65-125℃]
 220 max None
  • High Resistivity
  • Greater TCR than NCH-1

CN30

Electrical resistance
copper-nickel alloys
for general use
0.30 About 180
[20-105℃]
120 max None
  • General Resistivity
  • Lower TCR
  • Good Workability and Weldability

CN49

0.49 -80-40
[20-105℃]
120 max None

MANGANIN®*2

Electrical resistance
copper-manganese
alloys
for general use
0.44 ±20
[20-50℃]
120 max None
  • General Resistivity
  • Poor Corrosion Resistance and Oxidation Resistance
  • Good Workability and Weldability

ZERANIN®*2 30

- 0.29 ±10
[20-60℃]
 120 max None
  • Low Resistivity
  • Suitable for high-current sensing resistor applications
  • Good Workability and Weldability

TJR-1


(Stainless Steels)
- 1.42 ±50
[25-125℃]
250 max Strong
  • High Resistivity
  • Ferrite Stainless Steel With Great High‐Temperature Oxidation Resistance
  • Substitute for FCH 1

*1 Evanohm R is a registered trademark of Carpenter Technology Corporation.

*2 MANGANIN and ZERANIN are registered trademarks of Isabellenhutte.



 

Standards

Each standard is for reference only.

Please scroll horizontally to view.

Chemical Compositions Alloy Other Alloy Designations Standards
Germany DIN China GB Japan JIS
Ni-Cr  NCH-1  ISA-CHROM 80 NiCr8020 2080
Cr20Ni80
NCHRW1
GNC108R
 NCH-2   ISA-CHROM 60  NiCr6015 1560
Cr15Ni60
NCHRW2
GNC112R
Ni-Cr-Al   Evanohm R ® *1 ISAOHM NiCr20AlSi --- ---
Cu-Ni CN30 ISAZIN  CuNi23Mn B25 GCN30R 
CN49 ISOTAN CuNi44 6J40 GCN49R 
Cu-Mn-Ni MANGANIN® *2 MANGANIN CuMn12Ni 6J12
6J13
GCM44
Cu-Mn-Sn ZERANIN® *2 30 ZERANIN 30  CuMn7Sn 6J8 ---
Fe-Cr-Al TJR-1 Resistohm CrAl255  0Cr25Al5  FCH-1

*1 Evanohm R is a registered trademark of Carpenter Technology Corporation.

*2 MANGANIN and ZERANIN are registered trademark of Isabellenhutte.

Chemical Compositions

Please scroll horizontally to view.

Alloy  JIS C Si Mn Cu Al Cr Ni Sn Fe Others Density
NCH-1  GNC108 0.15
max
0.75-1.6 2.5
max
    19-21 77 min   1.0
max
  8.4
NCH-2  GNC112 0.15
max
0.75-1.6 1.5
max
    15-18 57 min   Bal.   8.3
EVANOHM R  -    1 2 2.5 20 73.5        8.1 
CN30  GCN30     1.5
max
      20-25     Cu+Ni+Mn 99 min  8.9
CN49  GCN49     0.5-2.5        42-48      Cu+Ni+Mn
99 min 
 
8.9
MANGANIN  GCM44      10-13       1-4      Cu+Ni+Mn 98 min 8.4 
ZERANIN30  -     7 Bal.         2.3     8.5
TJR-1
(Stainless Steels)
 -  0.015 max 1.0
max
1.0
max
  4.5-6 19-21     Bal.     7.3

Specifications:Adjustment of Conductor Resistance

We can adjust conductor resistance upon your request.
Even with the same material, conductor resistance varies depending on the product dimensions (thickness / width) and the degree of softening (tempering) of the product. By controlling these factors, we can achieve high-precision conductor resistance values.


■Difference between volume resistivityand conductor resistance.

  • Volume resistivity is a material-specific physical property and its unit is μΩ-m.It is affected by variations in composition of melting lot.
  • Conductor resistance is the resistance per meter length of reroll product, and its unit is Ω/m.

 

【Relationship between Volume Resisivity (ρ) and Conductor Resistance(R)】

Conductor Resistance(R) = Volume  Resistivity(ρ) Thickness(t)×Width(w)

 
ρ  : Volume Resistivity(μΩ・m)
t   :Thickness(mm)
w :Width(mm)

Advantages of TOKKIN

TOKKIN's materials for Electric Resistance have the following advantages.
  1. Fine adjustment of conductor resistance is possible.
    Even with the same material, there will be variations in volume resistivity depending on the melting lot and preparation.
    We guarantee highly accurate conductor resistance values by adjusting plate thickness while measuring resistance values during the process.
  2. Resistance temperature coefficient (TCR) is guaranteed.
    Depending on the material, we can guarantee Temperature Coefficient of Resistance (TCR) upon your request.
    [For example] Zeranin30: 20-60℃ ±10ppm
  3. Highly accurate thickness tolerances are guaranteed.
    In resistive materials, variations in thickness affect resistance. We guarantee highly accurate thickness tolerances with our long-cultivated technology.
  4. Small lot production is available.
    For resistor materials, we can manufacture small lot of 50 kg or more.
    *We can also flexibly accommodate orders of less than 50 kg for prototypes, etc. Please feel free to contact us.
  5.  Ultra-thin foil can also be manufactured.
    We manufacture from a minimum thickness of 0.030mm (30μm), and meet the market needs for smaller and thinner products.
  6. Hardness can be adjusted upon your request.
    By combination of cold rolling and heat treatment, we can adjust material's hardness to your requested one.

Electrical Heating Alloy

Lineup and Features

Please scroll horizontally to view.

Alloy Type Typical Value Features
Volume Resistivity
[μΩ・m]
Maximum
Operating
Temperature
[℃]
Hardness
[HV] 
Magnetism
 

NCH-1

 
Electrical resistance
nickel-chromium
alloys for heating
 1.08 1100 250 max None
  • Excellent oxidation resistance and high-temperature strength.
  • Use in sulfuric acid gas and in a hot and humid reducing atmosphere should be avoided.
 

NCH-2

 1.12 1000 250 max None

FCH-1

Iron-chromium
alloys for electrical
heating
 1.42 1200 250 max  Strong
  • Recommended for use at high temperatures.
  • It has good oxidation resistance, but its high-temperature strength is inferior to that of NCH.

FCH-2

1.23 1100 250 max Strong

CN5

Electrical resistance
copper-nickel alloys
for general use
0.05 300 120 max None
  • Low Resistivity
  • Low Operating Temperature
  • Good Workability and Weldability

CN10

0.10 300 120 max None

CN15

0.15 400 120 max None

TJH-1


(Stainless Steels)
- 1.42 1200 250 max Strong
  • Ferrite stainless steel with great high‐temperature oxidation resistance
  • Substitute for FCH 1(Contribute to cost reduction)

Standards

Each standard is for reference only.

Please scroll horizontally to view.

Chemical Compositions Alloy Other Alloy Designations Standards
Germany DIN China GB Japan JIS
Ni-Cr   NCH-1  ISA-CHROM 80 NiCr8020 2080
Cr20Ni80
NCHRW1
GNC108R
 NCH-2   ISA-CHROM 60  NiCr6015 1560
Cr15Ni60
NCHRW2
GNC112R
Cu-Ni CN5 ALLOY 30 CuNi2 --- GCN5R
CN10 ALLOY 60 CuNi6 B5 GCN10R 
CN15 ALLOY 90 CuNi10 BFe10-1-1 GCN15R
Fe-Cr-Al TJR-1 Resistohm CrAl255  0Cr25Al5  FCH-1

 

Chemical Compositions

Please scroll horizontally to view.

Alloy  JIS C Si Mn P S Al Cr Ni Fe Others Density
NCH-1 NCHRW1 0.15 max 0.75-1.6 2.5
max
      19-21 77 min 1.0
max
  8.4
NCH-2 NCHRW2 0.15 max 0.75-1.6 1.5
max
      15-18 57 min Bal.   8.3
FCH-1 FCHRW1 0.1 max 1.5 max 1.0
max
    4-6 23-26   Bal.    7.2
FCH-2 FCHRW2 0.1 max 1.5
max
1.0
max
    2-4 17-21   Bal.    7.4
CN5 GCN5     1.0
max
        0.5-3    Cu+Ni+Mn 99 min 8.9
CN10 GCN10     1.0
max
        4-7   Cu+Ni+Mn 99 min 8.9
CN15 GCN15     1.0
max
        8-12   Cu+Ni+Mn 98 min 8.9
TJH-1(Stainless Steels)  - 0.015 max 1.0
max 
1.0
max
0.04
max
0.03
max
4.5-6 19-21   Bal.   7.3

Specifications:Design of Heating Element

Heat Quantity depends on the product dimensions (thickness / width), volume resistivity(ρ), and coefficient of increase in resistance.
Please let us know your requirements so that we can propose the grade and dimensions that best suit your needs.



【Relationship between heat quantity (Q), volume resistivity (ρ), and coefficient of increase in resistance】

Heat Quantity(Q) = RI2T = I2・T・ρ・k  t・w

 
R  :Electric Resistance(Ω)
ρ  :Volume Resistivity(μΩ・m)
k  :Coefficient of Increase in Resistance
I   :Electric Current(A)
T  :Time(sec.)
t   :Thickness(mm)
w :Width(mm)

Advantages of TOKKIN

TOKKIN's materials for electric heating have the following advantages.
  1.  Highly accurate thickness tolerances are guaranteed.
    In resistive materials, variations in thickness affect resistance. We guarantee highly accurate thickness tolerances with our long-cultivated technology.
  2. Small lot production is available.
    For resistor materials, we can manufacture small lot of 50 kg or more.
    *We can also flexibly accommodate orders of less than 50 kg for prototypes, etc. Please feel free to contact us.
  3. Ultra-thin foil can also be manufactured.
    We manufacture from a minimum thickness of 0.030mm (30μm), and meet the market needs for smaller and thinner products.
  4. Hardness can be adjusted upon your request.
    By combination of cold rolling and heat treatment, we can adjust material's hardness to your requested one.

Download Technical Data

Catalogue of resistance alloy

Electrical Resistance alloy / Electrical Heating Alloys 

 

Related Pages

Metal Foils│Stainless Steel, Iron, Steel, Nonferrous Metal

We can make it to foils (less than 0.10 mm thick) in all the materials we manufacture.

We welcome your questions and inquiries regarding materials.