MachineU > China Products > Minerals & Metallurgy > Metals & Metal Products > Other Metals & Metal Products
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Specifications
Brand Name :
Senphus
Model Number :
Cr20Ni35
Certification :
ISO9001
Place of Origin :
China
MOQ :
5kg
Payment Terms :
T/T, D/P
Supply Ability :
30 Tons per day
Delivery Time :
3 days
Packaging Details :
Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated.
Place of Orig :
China
Type :
Ni-Cr-Fe alloys
Application :
Heating element and resistor
Color :
Shiny silver or dark gray
Density :
7.90
Resistivity at 20 ℃ :
1.04±0.05
Melting point（℃） :
1390
Thermal conductivity :
43.8(KJ/m h ℃ )
Elongation at rupture（% ) :
>20
Description

Cr20Ni35 Heat-Resistant Nickel-Chromium-Iron Alloy with High Positive Temperature Coefficient

NiCr Alloy Wire Cr20Ni35 is a high-performance nickel-chromium alloy composed of 20% chromium and 35% nickel, designed for high-temperature resistance, oxidation resistance, and corrosion resistance. This alloy is particularly known for its use in heating elements, resistors, and industrial applications that require stable performance at elevated temperatures. NiCr Alloy Wire Cr20Ni35 is a versatile material offering excellent high-temperature performance, corrosion resistance, and stable electrical resistivity, making it an ideal choice for applications like heating elements, resistors, thermocouples, and other high-temperature electrical components. Its ability to perform reliably in industrial furnaces, ovens, and electrical heating systems ensures it is widely used across industries where durability and performance under heat are essential. Despite its higher cost compared to other alloys, its superior performance in extreme conditions justifies its use in high-demand applications.

Chemical Composition Wt.%

Cr20Ni35

 % Ni Fe C Si Mn P S Cr
Min 34 1 18
Max 37 Rest 0.08 3 1 0.02 0.015 21

Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys

Type



Performance

 Cr30Ni70 Cr15Ni60 Cr20Ni35 Cr20Ni80 Cr20Ni30 Cr25Ni20
Main Chemical composition Ni Rest 55.0-61.0 34.0-37.0 Rest 30.0-34.0 19.0-22.0
Cr 28.0-31.0 15.0-18.0 18.0-21.0 20.0-23.0 18.0-21.0 24.0-26.0
Fe ≤ 1.0 Rest Rest ≤ 1.0 Rest Rest
Max. continuous service temp. of element (℃) 1250 1150 1100 1200 1100 1050
Resistivity at 20 ℃(μΩm) 1.18±0.05 1.12±0.05 1.04±0.05 1.09±0.05 1.06±0.05 0.95±0.05
Density(g/cm3) 8.10 8.20 7.90 8.40 7.90 7.15
Thermal condyctivity (KJ/m·h·℃) 45.2 45.2 43.8 60.3 43.8 43.8
Coefficient of lines expansion (α×10-6/℃) 17.0 17.0 19.0 18.0 19.0 19.0
Melting point (approx.)(℃) 1380 1390 1390 1400 1390 1400
Elonation at rupture(%) ＞20 ＞20 ＞20 ＞20 ＞20 ＞20
Micrographic structure Austenite Austenite Austenite Austenite Austenite Austenite
Magnetic properties Non-magnetic Low-magnetic Low-magnetic Non-magnetic Low-magnetic Non-magnetic
Note:The various grades of electric resistance alloy material are blended with the amountof rare earth, titanium and other trace elements, to improve the processing performance andextend the period of the uselife.

Key Features of NiCr Alloy Wire Cr20Ni35:

  • Composition:

Nickel (Ni): 35% (provides excellent high-temperature stability and good electrical resistivity).

Chromium (Cr): 20% (enhances oxidation resistance and improves strength at high temperatures).

Iron (Fe): The balance, used to enhance the overall mechanical properties of the alloy.

Carbon (C): Low content to improve machinability and prevent carbide precipitation during heat exposure.

  • High-Temperature Resistance:

Designed to withstand continuous exposure to temperatures up to 1100°C (2012°F).

Maintains strength and stability at elevated temperatures, making it suitable for resistive heating applications and other high-heat environments.

  • Oxidation and Corrosion Resistance:

Oxidation Resistance: The alloy has a high degree of oxidation resistance due to the chromium content, which forms a stable oxide layer that prevents further oxidation.

Corrosion Resistance: With its significant chromium content, it also offers resistance to corrosion in many environments, particularly oxidizing atmospheres at high temperatures.

  • Electrical Resistivity:

Stable Electrical Resistivity: Offers a predictable and stable resistance under high temperatures, making it ideal for heating elements, resistors, and thermocouples.

Good Heat Generation Efficiency: Due to its resistive properties, it generates heat efficiently when used in electrical heating applications.

  • Mechanical Properties:

Strength and Ductility: Provides good tensile strength at high temperatures and remains ductile enough for fabrication.

Thermal Fatigue Resistance: Resistant to thermal cycling, making it ideal for applications that undergo repeated heating and cooling cycles.

  • Weldability and Fabrication:

Weldable: Can be welded using standard welding techniques such as TIG (GTAW) and MIG (GMAW) welding, with minimal risk of cracking or other issues.

Formability: Easily drawn into wires, rods, and other shapes for a variety of applications, particularly in heating elements and electrical components.

​Applications:

  • Heating Elements: Commonly used in industrial furnaces, electric heating elements, and ovens where high-temperature stability is critical.
  • Resistors: Used in the manufacturing of precision resistors and resistor grids that require stable electrical resistance.
  • Thermocouples and Sensors: Suitable for high-temperature thermocouples and temperature sensing elements.
  • Electrical Components: Often found in electrical heating components such as toasters, dryers, water heaters, and other similar products.
  • High-Temperature Applications: Also used in some chemical processing applications that require materials resistant to high heat and oxidation.

Technical data of wires

Dia. (mm) Cross-sectional area (mm²) Weight/Meter (g/m) Resistance/Meter at 20 ℃ (Ω/m) Dia. (mm) Cross-sectional area (mm²) Weight/Meter (g/m) Resistance/Meter at 20 ℃ (Ω/m)
0.018 0.000255 0.002117 3410-4610 0.25 0.04909 0.4074 20.88-23.54
0.020 0.000314 0.002606 2940-3740 0.28 0.06158 0.5111 16.64-18.76
0.022 0.000380 0.003154 2440-3100 0.30 0.07069 0.5867 14.49-16.35
0.025 0.000491 0.004075 1880-2400 0.32 0.07548 0.6265 12.74-14.36
0.028 0.000616 0.005113 1530-1870 0.33 0.08553 0.7099 12.20-13.40
0.030 0.000707 0.005868 1338-1696 0.38 0.1134 0.9412 9.13-10.09
0.032 0.000804 0.006673 1180-1440 0.40 0.1257 1.0433 8.24-9.108
0.035 0.000962 0.007985 981-1200 0.41 0.132 1.0956 7.68-8.89
0.040 0.001257 0.01043 780.7-954.1 0.45 0.159 1.3197 6.51-7.196
0.045 0.00159 0.0132 594-726 0.50 0.1963 1.6293 5.273-5.829
0.050 0.001963 0.01629 499.6-610.6 0.55 0.2376 1.9721 4.518-4.994
0.055 0.00238 0.01975 407-477 0.60 0.2827 2.3464 3.797-4.197
0.063 0.00312 0.02590 321.41-377.31 0.65 0.3318 2.7539 3.235-3.575
0.070 0.00385 0.03196 260.5-305.9 0.70 0.3848 3.1938 2.789-3.083
0.080 0.005027 0.04172 199.5-234.1 0.75 0.4418 3.6669 2.43-2.686
0.090 0.006362 0.0528 157.6-185.0 0.80 0.5027 4.1724 2.136-2.36
0.100 0.007854 0.0652 127.7-149.9 0.85 0.5674 4.7094 1.891-2.091
0.110 0.009852 0.08177 105.5-123.9 0.90 0.6362 5.2805 1.687-1.865
0.120 0.01227 0.1018 88.67-104.1 0.95 0.7088 5.883 1.46-1.62
0.140 0.01539 0.1277 65.85-75.77 1.00 0.7854 6.5188 1.367-1.511
0.150 0.01767 0.1467 56.75-66.63 1.10 0.9503 7.8875 1.13-1.26
0.160 0.02011 0.01669 50.42-58.00 1.12 0.9852 8.1772 1.05-1.17
0.170 0.022700 0.1884 44.18-51.86 1.18 1.0936 9.0769 0.95-1.05
0.180 0.02545 0.2112 40.26-45.40 1.20 1.313 10.8979 0.79-0.87
0.190 0.02835 0.2353 35.37-41.53 1.30 1.327 11.0141 0.78-0.86
0.200 0.03142 0.2608 32.62-36.78 1.40 1.539 12.7737 0.70-0.77
0.212 0.035300 0.2930 28.41-33.35 1.50 1.767 14.6661 0.60-0.67
0.220 0.03801 0.3155 26.65-30.39 1.60 2.011 16.8924 0.52-0.58

The tolerance or wires diameter

Wires Dia.(mm) Tolerance
0.018-0.025 ±0.001
0.028-0.035 ±0.0015
0.040-0.055 ±0.002
0.070 ±0.0025
0.08-0.10 ±0.003
0.11-0.14 ±0.004
0.16-0.20 ±0.005
0.22-0.25 ±0.006
0.28-0.30 ±0.007
0.32-0.40 ±0.01
0.41-0.50 ±0.015
0.55-0.80 +0.02/-0.03
0.85-1.00 +0.02/-0.03
1.10-1.50 ±0.03
Note:special specification can be produced as per client's request.

Technical data of ribbon

Thickness × Width(mm) Resistance/meter(20 ℃) (Ω/m) Surface area/ohm (20℃) (cm2/Ω) Weight/meter (g/m) Surface area/meter (cm2/m)
0.09x2.5 5.27 9.84 1.72 51.8
0.08x0.2 74 0.0756 0.122 5.6
0.08x0.3 49.4 0.154 0.183 7.6
0.08x0.4 37 0.259 0.244 9.6
0.08x0.5 29.6 0.392 0.305 11.6
0.08x0.6 24.7 0.551 0.367 13.6
0.08x0.7 21.2 0.737 0.428 15.6
0.08x0.8 18.5 0.951 0.489 17.6
0.08x0.9 16.5 1.19 0.55 19.6
0.08x1.0 14.8 1.46 0.611 21.6
0.08x1.2 12.3 2.07 0.733 25.6
0.08x1.5 9.87 3.2 0.916 31.6
0.08x1.8 8.23 4.57 1.1 37.6
0.08x2.0 7.4 5.62 1.22 41.6
0.07x0.2 84.6 0.0638 0.107 5.4
0.07x0.3 56.4 0.131 0.16 7.4
0.07x0.4 42.3 0.222 0.214 9.4
0.07x0.5 33.9 0.337 0.267 11.4
0.07x0.6 28.2 0.475 0.321 13.4
0.07x0.7 24.2 0.637 0.374 15.4
0.07x0.8 21.2 0.822 0.428 17.4
0.07x0.9 18.8 1.03 0.481 19.4
0.07x1.0 16.9 1.26 0.535 21.4
0.07x1.2 14.1 1.8 0.641 25.4
0.07x1.5 11.3 2.78 0.802 31.4
0.06x0.2 98.7 0.0527 0.0916 5.2
0.06x0.3 65.8 0.109 0.137 7.2
0.06x0.4 49.4 0.186 0.183 9.2
0.06x0.5 39.5 0.284 0.229 11.2
0.06x0.6 32.9 0.401 0.275 13.2
0.06x0.7 28.2 0.539 0.321 15.2
0.06x0.8 24.7 0.697 0.367 17.5
0.06x0.9 21.9 0.875 0.412 19.2
0.06x1.0 19.7 1.07 0.458 21.2
0.06x1.2 16.5 1.53 0.55 25.2
0.05x0.2 118 0.0422 0.0764 5.00
0.05x0.3 79 0.0886 0.115 7.00
0.05x0.4 59.2 0.152 0.153 9.00
0.05x0.5 47.4 0.232 0.191 11.00
0.05x0.6 39.5 0.329 0.229 13.00
0.05x0.7 33.9 0.443 0.267 15.0
0.05x0.8 29.6 0.574 0.305 17.0
0.05x0.9 16.3 0.722 0.344 19.0
0.05x1.0 23.7 0.886 0.382 21.0
Ribbon is rolled by the wire, the actual cross-sectional area of the ribbon is smaller 8％ than calculated by the rectangular.

Advantages of NiCr Alloy Wire Cr30Ni35:

  • High-Temperature Performance: Excellent resistance to high-temperature oxidation, making it suitable for environments up to 1100°C (2012°F).
  • Good Electrical Resistivity: Ideal for use in heating elements, resistors, and other electrical applications where stable resistivity is required.
  • Corrosion Resistance: Resists corrosion in a range of high-temperature, oxidizing conditions.
  • Fatigue and Thermal Cycling Resistance: Withstands repeated heating and cooling without degradation.
  • Fabrication Flexibility: Can be easily fabricated into wire forms for a range of applications, especially in industrial and electrical environments.

Limitations of NiCr Alloy Wire Cr30Ni35:

  • Cost: As with most high-performance alloys, it may be more expensive compared to other metals like stainless steel, which may limit its application in cost-sensitive areas.
  • Limited Resistance to Strong Acids: While it is highly resistant to oxidation, it may not perform as well in strongly acidic or highly corrosive environments compared to specialized alloys like Inconel or Hastelloy.
  • Cold Work Hardening: Can work-harden during cold-forming processes, requiring specialized handling or processing methods to prevent cracking or damage.

Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature CoefficientCr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature CoefficientCr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

Send your message to this supplier
Send Now

Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

Ask Latest Price
Watch Video
Product Detail
Brand Name :
Senphus
Model Number :
Cr20Ni35
Certification :
ISO9001
Place of Origin :
China
MOQ :
5kg
Payment Terms :
T/T, D/P
Contact Supplier
video
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient
Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

Jiangyin Chengxin Alloy Material Co., Ltd ，

Verified Supplier
1 Years
jiangsu, changzhou
Since 2003
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Pure Nickel Metal, NiCr Alloy, CuNi Alloy
Total Annual :
230000000-240000000
Employee Number :
1400~1500
Certification Level :
Verified Supplier
Discover similar products
View More

Find Similar Products By Category:

Supplier Homepage Products NiCr Alloy
MachineU China Products Minerals & Metallurgy Metals & Metal Products Other Metals & Metal Products
Contact Supplier
Submit Requirement