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NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
Specifications
Brand Name :
Senphus
Model Number :
Cr30Ni70
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 :
8.10
Resistivity at 20 ℃ :
1.18±0.05
Melting point（℃） :
1380
Thermal conductivity(KJ/mh ℃ ) :
45.2
Elongation at rupture（% ) :
>20
Description

NiCr Alloy Cr30Ni70 for High-Temperature Applications in Furnaces and Heat-Treating Equipment

Cr30Ni70 is a versatile nickel-chromium alloy known for its high resistivity, excellent corrosion resistance, and high-temperature stability. With 30% chromium and 70% nickel, it offers superior performance in corrosive and high-temperature environments. This alloy is widely used in electric heating elements, furnace components, and high-temperature structural parts. Its applications span across the chemical, aerospace, and metallurgical industries, as well as in household appliances and industrial ovens. Cr30Ni70's high resistivity makes it ideal for electric heating elements, while its corrosion resistance and thermal stability make it suitable for use in corrosive and high-temperature applications. Its physical properties, such as a low coefficient of thermal expansion and good mechanical strength, further enhance its utility in a variety of demanding applications.

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.

Chemical Composition Wt.% Cr30Ni60 % Ni Fe C Si Mn P S Cr Al
Min 0.75 28
Max Rest 0.08 0.08 1.6 0.6 0.02 0.015 31 0.5

Some key features of Cr30Ni70 include:

  1. Corrosion Resistance: Cr30Ni70 exhibits excellent resistance to various corrosive media, including oxidation, acids, and alkalis. The addition of chromium significantly enhances the alloy's corrosion resistance, providing good oxidation resistance in both oxidizing and reducing atmospheres, and relatively high resistance to environments containing sulfides and chlorides.

  2. High-Temperature Performance: Cr30Ni70 maintains high oxidation resistance up to 1200°C and retains stable resistivity at high temperatures. It is suitable for long-term use in environments with temperatures ranging from 1000 to 1100°C, where it can still perform excellently.

  3. Electrical Resistivity and Conductivity: Cr30Ni70 has a relatively high electrical resistivity, making it an ideal choice for electric heating elements. Its typical resistivity value is 1.18μΩ·m, and it maintains a stable resistivity even at high temperatures.

  4. Mechanical Properties: Cr30Ni70 also performs well in terms of mechanical properties, with moderate ductility and tensile strength, which meets the manufacturing requirements for complex-shaped electric heating elements. Its mechanical parameters at room temperature are as follows: tensile strength ≥550MPa, elongation ≥20%.

  5. Thermal Stability and Coefficient of Thermal Expansion: Cr30Ni70 has excellent thermal stability at high temperatures, maintaining dimensional stability in high-temperature environments. Its coefficient of thermal expansion is 13.0×10⁻⁶/K (20-1000°C), and this relatively low coefficient of thermal expansion makes it dimensionally stable in environments with rapid temperature changes.

  6. Chemical Composition: The main chemical components of Cr30Ni70 include nickel (Ni) about 70%, chromium (Cr) about 30%, and trace amounts of iron (Fe), manganese (Mn), silicon (Si), carbon (C), phosphorus (P), and sulfur (S).

  7. Physical Properties: The density of Cr30Ni70 is 8.1-8.45 g/cm³, the melting point is 1370-1410℃, and the thermal conductivity is 14 W/(m·K).

These characteristics make Cr30Ni70 alloy widely used in various fields such as chemical industry, aerospace, energy, and metallurgy, especially in applications that require high corrosion resistance and high-temperature performance.

Applications:

  1. Heating Elements in Furnaces: Cr30Ni70 is used as heating elements in periodic heat treatment furnaces with temperatures below 1050°C, such as carburizing furnaces and bell jar furnaces

  2. Heat-Resistant Structural Parts: It serves as high-quality heat-resistant steel structure parts, like shafts and burning frames in furnaces

  3. Metallurgical Industry: Cr30Ni70 is used in high-temperature furnace equipment such as furnace tubes and other high-temperature apparatus due to its stability and corrosion resistance at high temperatures

  4. Chemical Industry: The alloy is used in the production of reactors and pipelines that are resistant to high temperatures and corrosion

  5. Electric Heating Industry: Cr30Ni70, with its high resistivity, is suitable for manufacturing electric heating wires and resistors

  6. Aerospace: It is used in high-temperature engine parts and heat barrier materials, especially in turbines and combustion chambers

  7. Household Appliances: Cr30Ni70 is used in electric heating elements in household appliances such as electric ovens, water heaters, and ironing boards

  8. Industrial Ovens: The alloy is used in industrial ovens and furnaces, including wirewound resistors and metal film resistors

  9. Injection Molds and Soldering Irons: Cr30Ni70 is also used in injection molds and soldering irons due to its high-temperature resistance and stability

These applications highlight the versatility and importance of Cr30Ni70 in various industries where high temperatures and耐腐蚀性 are critical factors.

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.

NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating EquipmentNiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating EquipmentNiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment

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Product Detail
Brand Name :
Senphus
Model Number :
Cr30Ni70
Certification :
ISO9001
Place of Origin :
China
MOQ :
5kg
Payment Terms :
T/T, D/P
Contact Supplier
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NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment
NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment

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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