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NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
Specifications
Brand Name :
Senphus
Model Number :
Cr25Ni20
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 :
7.15
Resistivity at 20 ℃ :
0.95±0.05
Melting point（℃） :
1400
Thermal conductivity(KJ/m h ℃ ) :
43.8
Elongation at rupture（% ) :
>20
Name :
Cr25Ni20
Description

NiCr Alloy Wire Cr25Ni20 Perfect Combination of Oxidation Resistance Thermal Stability and Moderate Electrical Resistivity

Cr25Ni20 NiCr Alloy Wire is a nickel-chromium-based alloy consisting of 25% chromium and 20% nickel, designed for high-temperature applications. It is commonly used in environments where oxidation and corrosion resistance are crucial, as well as where moderate electrical resistivity is required. This alloy offers a combination of excellent high-temperature stability, oxidation resistance, and reliability in industrial applications, particularly in heating elements, resistors, and furnace components. Cr25Ni20 NiCr Alloy Wire is an excellent choice for high-temperature applications where oxidation resistance, electrical resistivity, and thermal durability are critical. Its performance in demanding environments like industrial furnaces, heating elements, and resistors makes it a versatile and reliable material in industries such as power generation, chemical processing, and electronics. While it is more costly than some other alloys, its ability to perform at high temperatures with excellent corrosion and oxidation resistance justifies its use in critical applications.

Chemical Composition Wt.%

Cr25Ni20

 % Ni Fe C Si Mn P S Cr
Min 19 24
Max 22 Bal. 0.02 0.8 0.8 0.02 0.015 26

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.

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

Some key features of Cr25Ni20 include:

  • Composition:

Nickel (Ni): 20% (provides excellent high-temperature strength and resistance to oxidation).

Chromium (Cr): 25% (enhances the alloy’s resistance to oxidation and scaling at high temperatures).

Iron (Fe): Balance (used for structural integrity and to keep the alloy cost-effective).

Other Elements: Trace amounts of silicon, manganese, and carbon for improving strength, workability, and weldability.

  • High-Temperature Resistance:

Oxidation Resistance: The 25% chromium content provides superior oxidation resistance, especially at elevated temperatures up to 1000°C (1832°F), ensuring long service life in environments where oxidation could degrade other materials.

Thermal Cycling Resistance: The alloy can endure repeated heating and cooling cycles without significant deterioration, making it suitable for industrial processes where temperature fluctuations are common.

  • Electrical Resistivity:

Moderate Electrical Resistivity: The alloy maintains a stable electrical resistance at elevated temperatures, making it suitable for applications like resistors and heating elements that require precise electrical properties.

Temperature Coefficient of Resistance (TCR): It exhibits a moderate TCR, which is important for applications where resistance needs to remain relatively stable as the temperature changes.

  • Corrosion and Scaling Resistance:

Corrosion Resistance: The high chromium content also enhances the alloy’s resistance to sulfidation and oxidizing environments, making it well-suited for use in high-temperature furnaces, chemical processing, and heat exchangers.

Scaling Resistance: Performs well in environments with scaling tendencies, thanks to the protective oxide layer formed by chromium.

  • Mechanical Properties:

Tensile Strength and Ductility: Offers good tensile strength at high temperatures, allowing it to be used in applications that require mechanical stability under thermal stress.

Ductility: Sufficiently ductile for drawing into wire, strips, or coils for various applications, including heating elements and resistors.

  • Weldability and Fabrication:

Weldability: The alloy can be welded using standard techniques like TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding, although care must be taken to avoid excessive heat to prevent embrittlement in the weld area.

Formability: Easily drawn into wire or formed into different shapes for manufacturing resistors, heating elements, and other components.

Applications:

  • Heating Elements: Widely used in industrial heating elements, furnaces, and electric heating systems that operate at high temperatures.
  • Resistors: Suitable for precision resistors and resistance temperature detectors (RTDs), where stable and consistent electrical resistance is required at elevated temperatures.
  • Furnace Components: Frequently used in parts of high-temperature furnaces, electric ovens, and dryers where reliable performance in harsh conditions is needed.
  • Thermocouples and Temperature Sensors: Can be used in thermocouples and temperature sensors, where high-temperature stability and oxidation resistance are required.

Advantages of Cr25Ni20 NiCr Alloy Wire:

  • High-Temperature Durability: Performs excellently in environments with temperatures up to 1000°C (1832°F), making it ideal for high-temperature applications like heating elements and industrial furnaces.
  • Superior Oxidation Resistance: The 25% chromium content provides excellent resistance to oxidation, ensuring long life even in harsh conditions.
  • Electrical Resistivity: Provides stable electrical resistivity, which is essential for applications like resistors and heating elements that require predictable performance over time.
  • Corrosion Resistance: Good resistance to sulfidation and scaling, making it reliable in high-temperature industrial applications.
  • Versatility: Easily processed into wire, strips, or coils, and can be welded for various uses in heating systems, furnaces, and other high-temperature applications.

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.

NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical ResistivityNiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical ResistivityNiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity

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Product Detail
Brand Name :
Senphus
Model Number :
Cr25Ni20
Certification :
ISO9001
Place of Origin :
China
MOQ :
5kg
Payment Terms :
T/T, D/P
Contact Supplier
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NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity
NiCr Alloy Wire Cr25Ni20 Perfect Combination Of Oxidation Resistance Thermal Stability And Moderate Electrical Resistivity

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
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