Nickel-Chromium Alloy Wires
Cr20Ni35/Cr20Ni30 resistance wire
- Features:
- Cr20Ni35/Cr20Ni30 is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent cold working properties, good weldability. Both Cr20Ni35 and Cr20Ni30 are mature nickel-chromium based heating alloys. Cr20Ni35 is slightly superior in high-temperature stability, corrosion resistance and service life, suitable for high-end applications; Cr20Ni30 offers cost advantages, suitable for large-scale medium-temperature applications. Both have similar resistivity and can be used interchangeably in the 800-1000℃ temperature range. Selection should comprehensively consider specific operating temperature, environmental conditions, and cost budget.
- Cr20Ni35 Resistance Wire is also known as Chromel D, Nikrothal 40, N4, Chromax, HAI-NiCr 40, Tophet D, Resistohm 40, Cronifer III, 35-20 Ni-Cr, Alloy D, Nikrothal 4, MWS-610, Stablohm 610
- Advantages:
- At high temperatures, Cr20Ni35/Cr20Ni30 can maintain stable mechanical properties, and their antioxidant performance is stable below 1000ºC. The corrosion rate is extremely low in strong acid, strong alkali, and reducing atmospheres, such as in 5% sulfuric acid where the corrosion rate is significantly lower than that of stainless steel.
- Specifications:
- Bright and soft annealed finish: 0.025 - 1.6mm; Acid-pickled finish: 1.0 -12.0mm; Rods: 6.0-150.0mm
Flat wire: width from 0.2 - 6.0mm and thickness from 0.08 - 1.0mm; Wide strip: width from 5.0 - 300mm and thickness from 0.05 - 4.0mm
Product Description
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Chemical Composition:| Alloy | C | P | S | Mn | Si | Cr | Ni | Al | Fe |
|---|---|---|---|---|---|---|---|---|---|
| ≤ | |||||||||
| Cr20Ni35 | 0.08 | 0.02 | 0.015 | 1.0 | 1.0~3.0 | 18.0~21.0 | 34.0~37.0 | - | Remainder |
| Cr20Ni30 | 0.08 | 0.02 | 0.015 | 1.0 | 1.0~3.0 | 18.0~21.0 | 30.0~34.0 | - | Remainder |
| Max. continuous service Temp. | 1100ºC | Resistivity at 20ºC (μΩ·m) | 1.04±0.05 |
| Density | 7.90 g/cm3 | Thermal conductivity(20ºC) | 13 W/(m·K) |
| Average linear expansion coefficient(20-1000ºC) | 19.0×10-6/K | Specific heat capacity | 0.50 J/(g·K) |
| Approx. melting point | 1390ºC | Elongation | Diameter≤3.0mm: ≥20% Diameter>3.0mm: ≥25% |
| Tensile strength(Rm/MPa) | ≥600 | Accelerated life test | ≥80h/1100ºC |
| Micrographic structure | Austenite | Magnetic properties | Non-magnetic |
|
Diameter
(mm) |
Ohm per meter
(20ºC Ω/m) |
Length per kg
(m/kg) |
Weight per meter
(g/m) |
Diameter
(mm) |
Ohm per meter
(20ºC Ω/m) |
Length per kg
(m/kg) |
Weight per meter
(g/m) |
|---|---|---|---|---|---|---|---|
| 0.05 | 529.668 | 64467.88 | 0.01551 | 1.1 | 1.0944 | 133.20 | 7.50761 |
| 0.06 | 367.825 | 44769.36 | 0.02234 | 1.2 | 0.9196 | 111.92 | 8.93468 |
| 0.07 | 270.239 | 32891.78 | 0.03040 | 1.3 | 0.7835 | 95.37 | 10.48584 |
| 0.08 | 206.902 | 25182.77 | 0.03971 | 1.4 | 0.6756 | 82.23 | 12.16109 |
| 0.09 | 163.478 | 19897.49 | 0.05026 | 1.5 | 0.5885 | 71.63 | 13.96044 |
| 0.1 | 132.417 | 16116.97 | 0.06205 | 1.6 | 0.5173 | 62.96 | 15.88388 |
| 0.11 | 109.436 | 13319.81 | 0.07508 | 1.7 | 0.4582 | 55.77 | 17.93141 |
| 0.12 | 91.956 | 11192.34 | 0.08935 | 1.8 | 0.4087 | 49.74 | 20.10303 |
| 0.13 | 78.353 | 9536.67 | 0.10486 | 1.9 | 0.3668 | 44.65 | 22.39875 |
| 0.15 | 58.852 | 7163.10 | 0.13960 | 2.0 | 0.3310 | 40.29 | 24.81856 |
| 0.17 | 45.819 | 5576.81 | 0.17931 | 2.2 | 0.2736 | 33.30 | 30.03046 |
| 0.19 | 36.681 | 4464.53 | 0.22399 | 2.4 | 0.2299 | 27.98 | 35.73873 |
| 0.21 | 30.027 | 3654.64 | 0.27362 | 2.6 | 0.1959 | 23.84 | 41.94337 |
| 0.25 | 21.187 | 2578.72 | 0.38779 | 2.8 | 0.1689 | 20.56 | 48.64438 |
| 0.27 | 18.164 | 2210.83 | 0.45232 | 3.0 | 0.1471 | 17.91 | 55.84176 |
| 0.29 | 15.745 | 1916.41 | 0.52181 | 3.2 | 0.1293 | 15.74 | 63.53552 |
| 0.31 | 13.779 | 1677.10 | 0.59627 | 3.4 | 0.1145 | 13.94 | 71.72564 |
| 0.35 | 10.810 | 1315.67 | 0.76007 | 3.6 | 0.1022 | 12.44 | 80.41214 |
| 0.40 | 8.276 | 1007.31 | 0.99274 | 3.8 | 0.0917 | 11.16 | 89.59501 |
| 0.45 | 6.539 | 795.90 | 1.25644 | 4.0 | 0.0828 | 10.07 | 99.27424 |
| 0.50 | 5.297 | 644.68 | 1.55116 | 4.5 | 0.0654 | 7.96 | 125.64397 |
| 0.55 | 4.377 | 532.79 | 1.87690 | 5.0 | 0.0530 | 6.45 | 155.11601 |
| 0.60 | 3.678 | 447.69 | 2.23367 | 5.5 | 0.0438 | 5.33 | 187.69037 |
| 0.65 | 3.134 | 381.47 | 2.62146 | 6.0 | 0.0368 | 4.48 | 223.36705 |
| 0.70 | 2.702 | 328.92 | 3.04027 | 6.5 | 0.0313 | 3.81 | 262.14605 |
| 0.80 | 2.069 | 251.83 | 3.97097 | 7.0 | 0.0270 | 3.29 | 304.02737 |
| 0.85 | 1.833 | 223.07 | 4.48285 | 7.5 | 0.0235 | 2.87 | 349.01101 |
| 0.90 | 1.635 | 198.97 | 5.02576 | 8.0 | 0.0207 | 2.52 | 397.09698 |
| 0.95 | 1.467 | 178.58 | 5.59969 | 8.5 | 0.0183 | 2.23 | 448.28526 |
| 1.00 | 1.324 | 161.17 | 6.20464 | 9.0 | 0.0163 | 1.99 | 502.57586 |
The above parameters are based on Chinese National Standard GB/T1234-2012. The tolerance of resistance per meter: 0.03-0.06mm is ±10%; 0.07-0.12mm is ±8%; 0.13-0.17mm is ±7%; 0.18-0.32mm is ±6%; A wire diameter above 0.32mm is ±5%. We provide nickel-chromium alloy products in various shapes, such as wires, ribbons, and rods. Other alloys like Cr20Ni80, Cr30Ni70 and Cr15Ni60 are also available upon request.