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Home Products Cr20Ni35/Cr20Ni30 Resistance Wire
Cr20Ni35 wire
Cr20Ni30 wire
NiCr4020 wire

Cr20Ni35/Cr20Ni30 bright soft resistance wires

Features:
Cr20Ni35/Cr20Ni30 is a high-temperature nickel chromium alloy mainly composed of chromium (Cr) and nickel (Ni). The alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability. The melting point of Cr20Ni35/Cr20Ni30 is as high as 1390ºC, the working temperature can reach 1100ºC, and the short-term tolerance temperature can reach 1250ºC.
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. Typical applications for Cr20Ni35/Cr20Ni30 are night-storage heaters, convection heaters, heavy duty rheostats and fan heaters. Both alloys are also used for heating cables and rope heaters in defrosting and de-icing elements, electric blankets and pads, car seats, baseboard heaters and floor heaters, resistors.
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

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
Physical Properties:
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 α×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
Technical parameters:
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.