Shanghai Tankii Alloy Material Co.,Ltd

Shanghai Tankii Alloy Material Co.,Ltd

 

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Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor

Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor

    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
    • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor
  • Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor

    Product Details:

    Place of Origin: Shanghai, China
    Brand Name: TANKII
    Certification: ISO9001: 2008
    Model Number: Ni80Cr20

    Payment & Shipping Terms:

    Minimum Order Quantity: 20kg
    Price: Negotiated
    Packaging Details: Spool, carton, plywod case with plastic film as clients required
    Delivery Time: 7-12 DAYS
    Payment Terms: L/C, T/T, Western Union, Paypal
    Supply Ability: 200+TON+MONTH
    Contact Now
    Detailed Product Description
    Material: Nichrome Density: 8.4g/cm3
    Melting Point: 1400 Treatment: Cold Rolled
    Surface: Bright Or Oxidised Free Sample: Available

    Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip for Braking Resistor

     

    The "80/20" nickel-chromium alloy in wire or strip form is used extensively as the heating element in resistance heating applications. An accepted means for evaluating the performance of a heating element is by ASTM life test B76-65. In this test, a constant temperature of 2175°F on a 0.0253 inch diameter wire, maintained by resistance heating, is applied at "2 minute on - 2 minute off" intervals until failure by burnout occurs. This life test may be significantly accelerated by raising the wire being tested to a temperature of 2200°F, while keeping all other test conditions the same. In addition, carrying out the test as a constant temperature test, by changing the power supplied to the sample during the test, is a more severe test than a constant voltage test or constant current test which have been used in the past. In a constant voltage test, the input voltage is maintained constant throughout the test. Because of high temperature oxidation, the effective diameter of the wire decreases, causing an increase in resistance. This in turn cause a decrease in electrical current flowing through the wire, because of the constant voltage. The net result is a decrease in power supplied to the wire, and a significant decrease in test temperature. Therefore, the test temperature toward the end of a constant voltage life test could be 100°F lower than the initial temperature. On this basis, the constant temperature test is much more severe than the constant voltage test and results from these tests should not be directly compared without an understanding of the boundary condition of these two tests. The average life to failure at 2200°F of a commercial 80/20 nickel-chromium alloy produced is 197 hours.

    The beneficial effect of zirconium upon operating life of the 80/20 nickel-chromium alloy heating elements is known. The addition of calcium and zirconium to such an alloy increases its operating life. The addition of aluminum with calcium and zirconium to nickel-chromium-iron alloys also does the same. Subsequently the addition of calcium, aluminum and rare earths to improve life of nickel-chromium-iron alloys over lives obtainable for such alloys containing calcium, aluminum and zirconium. Zirconium has also been added to nickel-chromium-iron alloys of the superalloy type, high temperature resistant and corrosion resistant

     

    Diámetro (mm) Ω /m Área de sección por ohmios(cm2/Ω ) a las 20Ω. Peso por metro(g/m). Área de superficie por metro (cm2/m). Área de sección (mm2)
    10.00 0.0185 17000 558 314 El 78,5
    9.50 0.0205 14600 503 298 70.9
    9.00 0.0228 12400 452 283 63.6
    8.50 0.0256 10500 403 267 56.7
    8.00 0.0288 8710 357 251 50.3
    7.50 0.0328 7180 314 236 44.2
    7.00 0.0377 5840 273 220 38.5
    6.50 0.0437 4670 236 204 33.2
    6.00 0.0513 3680 201 188 28.3
    5.50. 0.061 2830 169 173 23.8
    5.00 0.0738 2130 139 157 19.6
    4.80 0.0801 1880 128 151 18.1
    4.50 0.0912 1550 113 141 15.9
    4.20 0,105 1260 98.4 132 13.9
    4.00 0,115 1090 El 89,2 126 12.6
    3.80 0.128 934 80.5 119 11.3
    3.50 0,151 730 68.3 110 9.62
    3.20 0,180 558 57.1 101 8.04
    3.00 0.205 459 50.2 94.2 7.07
    2.80          
    2.50 0,295 266 34.9 El 78,5 4.91
    2.20 0.381 181 27 69.1 3.80
    2.00 0.462 136 22.3 62.8 3.14
    1.90 0.511 117 20.1 59.7 2.84
    1.80 0.570 99.2 18.1 56.5 2.54
    1.70 0.639 83.6 16.1 53.4 2.27
    1.60 0.721 El 69,7 14.3 50.3 2.01
    1.50 0,821 57.4 12.5 47.1 1.77
    1.40 0.942 46.7 10.9 44.0 1.54
    1.30 1.09 37.4 9.42 40.8 1.33
    1.20 1.28 29.4 8.03 37.7 1.13
    1.10 1.53 22.6 6.75 34.6 0.95
    1.00 1.85 17 5.58 31.4 0,785
    0.95 2.05 14.6 5.03 29.8 0,709"
    0.90 2.28 12.4 4.52 28.3 0.636
    0.85 2.56 10.5 4.03 26.7 0,567
    0.80 2.88 8,71 3.57 25.1 0.503
    0.75 3.28 7.18 3.14 23.6 0,442
    0.70 3.77 5.84 2.73 22.0 0.385
    0.65 4.37 4.67 2.36 20.4 0.332
    0.60 5.13 3.68 2.01 18.8 0.283
    0.55 6.1. 2,83 1.69 17.3 0.238
    0.50 7.38 2.13 1.39 15.7 0.196
    0.48 8.01 1.88 1.28 15.1. 0.181
    0.45 9.12 1.55 1.13 14.1. 0.159
    0,42 10.5 1.26 0.984 13.2 0.139
    0.40 11.5 1.09 0.892 12.6 0.126
    0.38 12.8 0.934 0.805 11.9 0.113
    0.35 15.1. 0.73 0.683 11.0 0.0962
    0.32 18 0.558 0.571 10.1. 0.0804
    0.30 20.5 0.459 0.502 9.42 0.0707
    0.28 23.5 0,374 0,437 8.8 0.0616
    0.26 27.3 0.299 0.377 8.17 0.0531
    0.25 29.5 0,266 0.349 7.85 0.0491
    0.24 32.1 0,235 0.321 7.54 0.0452
    0.23 34.9 0.207 0,295 7.23 0.0415
    0.22 38.1 0.181 0.27 6,91 0,038
    0.21 El 41,9 0.158 0,246 6.6 0.0346
    0.20 46.2 0,136 0.223 6.28 0.0314
    0.19 51.1 0.117 0.201 5.97 0.0284
    0.18 57 0.0992 0.181 5.65 0.0254
    0.17 El 63,9 0.0836 0.161 5.34 0.0227
    0.16 72,1 0.0697 0,143 5.03 0.0201
    0.15 82.1 0.0574 0,125 4,71 0.0177
    0.14 94.2 0.0467 0.109 4.40 0.0154
    0.13 109 0.0374 0.0942 4.08 0.0133
    0.12 128 0.0294 0.0803 3.77 0.0113
    0.11 153 0.0226 0.0675 3.46 0.0095
    0.10 185 0,017 0.0558 3.14 0.00785
    0.09 228 0.0124 0.0452 2,83 0.0636
    0.08 288 0.00871 0.0357 2.51 0.00503
    0.07 377 0.00584 0.0273 2.20 0.00385
    0.06 513 0.00368 0.0201 1.88 0.00283
    0.05 738 0.00213 0.0139 1.57 0.001

     

     

    However, the addition of zirconium to nickel-chromium alloys for the purpose of extending life of heating elements of these alloys has several attendant disadvantages, including a detrimental effect upon workability of the alloys at addition levels approaching 0.2 weight percent, loss of zirconium during charging into the alloy melt, and variations of such charge losses from melt to melt. All of these factors have led to difficulty and expense in producing heating element alloys of predictably long operating lives by the addition of zirconium.

     

     

    It is felt that significant increases in the operating life of an 80/20 nickel-chromium alloy without attendant processing difficulties would enable longer life of heating elements incorporating these alloys, or alternatively enable smaller size heating elememts without a corresponding reduction in operating life, and that accordingly such increases in operating life would be an advancement in the art.

     

    Electric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking ResistorElectric Heat Strips Tape N8/Ni80cr20 Nikrothal 8 Resistance Strip For Braking Resistor

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