Categories: Heating materials , Resistance materials

Content:
Kanthal® A-1 and Kanthal® APM
Kanthal® A, Kanthal® AF and Kanthal® AE
Kanthal® D
Alkrothal®
Nikrothal® 80, Nikrothal® TE and Nikrothal® 70
Nikrothal® 60
Nikrothal® 40 and Nikrothal® 20
Nifethal® 70
Nifethal® 52
Cuprothal®

Kanthal® A-1 and Kanthal® APM

Wire dimensions and properties

Resistivity 1.45 Ω mm2/m (872 Ω/cmf). Density 7.10 g /cm3 (0.256 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400
Ct 1.00 1.00 1.00 1.00 1.00 1.01 1.02 1.02 1.03 1.03 1.04 1.04 1.04 1.04 1.05
Diameter, mm Resistance at 20°C Surface area per Ω Weight Surface area Cross sectional area
Kanthal® A-1 Kanthal® APM Ω/m cm2/Ω* g/m cm2/m mm2
10.0 10.0 0.0185 17017 558 314 78.5
9.5 9.5 0.0205 14590 503 298 70.9
9.27 0.0215 13555 479 291 67.5
8.25 8.25 0.0271 9555 380 259 53.5
8.0 8.0 0.0288 8713 357 251 50.3
7.35 7.35 0.0342 6757 301 231 42.4
7.0 7.0 0.0377 5837 273 220 38.5
6.54 0.0432 4760 239 205 33.6
6.5 6.5 0.0437 4673 236 204 33.2
6.0 6.0 0.0513 3676 201 188 28.3
5.83 0.0543 3372 190 183 26.7
5.5 5.5 0.0610 2831 169 173 23.8
5.0 5.0 0.0738 2127 139 157 19.6
4.75 4.75 0.0818 1824 126 149 17.7
4.62 0.0865 1678 119 145 16.8
4.5 4.5 0.0912 1551 113 141 15.9
4.25 4.25 0.102 1306 101 134 14.2
4.11 0.109 1181 94.2 129 13.3
4.06 0.112 1139 91.9 128 12.9
4.0 4.0 0.115 1089 89.2 126 12.6
3.75 3.75 0.131 897 78.4 118 11.0
3.65 0.139 827 74.3 115 10.5
3.5 3.5 0.151 730 68.3 110 9.62
3.35 0.165 640 62.6 105 8.81
3.25 3.25 0.175 584 58.9 102 8.30
3.2 0.180 558 57.1 101 8.04
3.0 3.0 0.205 459 50.2 94.2 7.07
2.95 0.212 437 48.5 92.7 6.83
2.9 2.9 0.220 415 46.9 91.1 6.61
2.8 2.8 0.235 374 43.7 88.0 6.16
2.65 0.263 317 39.2 83.3 5.52
2.6 2.6 0.273 299 37.7 81.7 5.31
2.5 2.5 0.295 266 34.9 78.5 4.91
2.4 0.321 235 32.1 75.4 4.52
2.34 0.337 218 30.5 73.5 4.30
2.3 2.3 0.349 207 29.5 72.3 4.15
2.25 0.365 194 28.2 70.7 3.98
2.2 2.2 0.381 181 27.0 69.1 3.80
2.05 0.439 147 23.4 64.4 3.30
2.03 0.448 142 23.0 63.8 3.24
2.0 2.0 0.462 136 22.3 62.8 3.14
1.83 0.551 104 18.7 57.5 2.63
1.8 1.8 0.570 99 18.1 56.5 2.54
1.7 1.7 0.639 83.6 16.1 53.4 2.27
1.6 0.695 73.7 14.8 51.2 2.09
1.6 0.721 69.7 14.3 50.3 2.01
1.5 1.5 0.821 57.4 12.5 47.1 1.77
1.4 0.942 46.7 10.9 44.0 1.54
1.3 1.09 37.4 9.42 40.8 1.33
1.2 1.2 1.28 29.4 8.03 37.7 1.13
1.1 1.53 22.6 6.75 34.6 0.950
1.0 1.0 1.85 17.0 5.58 31.4 0.785

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Kanthal® A, Kanthal® AF and Kanthal® AE

Wire dimensions and properties

Resistivity 1.39 Ω mm2/m (836 Ω/cmf). Density 7.15 g /cm3 (0.258 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Ct 1.00 1.00 1.01 1.01 1.02 1.03 1.04 1.04 1.05 1.05 1.06 1.06 1.06 1.06
Diameter, mm Resistance at 20°C Surface area per Ω Weight Surface area Cross sectional area
Kanthal® A Kanthal® AF Ω/m cm2/Ω* g/m cm2/m mm2
10.0 10.0 0.0177 17751 562 314 78.0
8.25 0.0260 9968 382 259 53.5
8.0 0.0277 9089 359 251 50.3
7.5 0.0315 7489 316 236 44.2
7.35 0.0328 7048 303 231 42.4
7.0 0.0361 6089 275 220 38.5
6.54 0.0414 4965 240 205 33.6
6.5 0.0419 4875 237 204 33.2
6.0 0.0492 3834 202 188 28.3
5.83 0.0521 3517 191 183 26.7
5.5 0.0585 2953 170 173 23.8
5.2 0.0655 2496 152 163 21.2
5.0 0.0708 2219 140 157 19.6
4.75 0.0784 1902 127 149 17.7
4.62 0.0829 1750 120 145 16.8
4.5 0.0874 1618 114 141 15.9
4.25 0.0980 1363 101 134 14.2
4.11 0.105 1232 94.9 129 13.3
4.0 0.111 1136 89.8 126 12.6
3.75 0.126 936 79.0 118 11.0
3.65 0.133 863 74.8 115 10.5
3.5 0.144 761 68.8 110 9.62
3.25 0.168 609 59.3 102 8.30
3.2 0.173 582 57.5 101 8.04
3.0 0.197 479 50.5 94.2 7.07
2.9 0.210 433 47.2 91.1 6.61
2.8 0.226 390 44.0 88.0 6.16
2.6 0.262 312 38.0 81.7 5.31
2.5 0.283 277 35.1 78.5 4.91
2.4 0.307 245 32.3 75.4 4.52
2.3 0.335 216 29.7 72.3 4.15
2.25 0.350 202 28.4 70.7 3.98
2.2 0.366 189 27.2 69.1 3.80
2.0 0.442 142 22.5 62.8 3.14
1.8 0.546 104 18.2 56.5 2.54
1.7 0.612 87.2 16.2 53.4 2.27
1.65 0.650 79.7 15.3 51.8 2.14
1.6 0.691 72.7 14.4 50.3 2.01
1.5 0.787 59.9 12.6 47.1 1.77
1.4 0.903 48.7 11.0 44.0 1.54
1.3 1.05 39.0 9.49 40.8 1.33
1.2 1.23 30.7 8.09 37.7 1.13
1.1 1.46 23.6 6.79 34.6 0.950
1.0 1.77 17.8 5.62 31.4 0.785
0.95 1.96 15.2 5.07 29.8 0.709
0.90 0.90 2.18 12.9 4.55 28.3 0.636
0.85 0.85 2.45 10.9 4.06 26.7 0.567
0.80 0.80 2.77 9.09 3.59 25.1 0.503
0.75 0.75 3.15 7.49 3.16 23.6 0.442
0.70 0.70 3.61 6.09 2.75 22.0 0.385
0.65 0.65 4.19 4.87 2.37 20.4 0.332
0.60 0.60 4.92 3.83 2.02 18.8 0.283
0.55 0.55 5.85 2.95 1.70 17.3 0.238
0.50 0.50 7.08 2.22 1.40 15.7 0.196
0.45 0.45 8.74 1.62 1.14 14.1 0.159
0.40 0.40 11.1 1.14 0.898 12.6 0.126
0.35 0.35 14.4 0.761 0.688 11.0 0.0962
0.30 0.30 19.7 0.479 0.505 9.42 0.0707
0.25 28.3 0.277 0.351 7.85 0.0491
0.20 44.2 0.142 0.225 6.28 0.0314
0.15 78.7 0.060 0.126 4.71 0.0177

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Kanthal® D

Wire dimensions and properties

Resistivity 1.35 Ω mm2/m (812 Ω/cmf). Density 7.25 g /cm3 (0.262 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Ct 1.00 1.00 1.01 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.07 1.07 1.08 1.08
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
8.0 0.0269 9358 364 251 50.3
6.5 0.0407 5019 241 204 33.2
6.0 0.0477 3948 205 188 28.3
5.5 0.0568 3041 172 173 23.8
5.0 0.0688 2285 142 157 19.6
4.75 0.0762 1959 128 149 17.7
4.5 0.0849 1666 115 141 15.9
4.25 0.0952 1403 103 134 14.2
4.06 0.104 1223 93.9 128 12.9
4.0 0.107 1170 91.1 126 12.6
3.75 0.122 964 80.1 118 11.0
3.65 0.129 889 75.9 115 10.5
3.5 0.140 784 69.8 110 9.62
3.25 0.163 627 60.1 102 8.30
3.0 0.191 493 51.2 94.2 7.07
2.95 0.198 469 49.6 92.7 6.8
2.8 0.219 401 44.6 88.0 6.16
2.65 0.245 340 40.0 83.3 5.5
2.5 0.275 286 35.6 78.5 4.91
2.0 0.430 146 22.8 62.8 3.14
1.8 0.531 107 18.4 56.5 2.54
1.7 0.595 89.8 16.5 53.4 2.27
1.6 0.671 74.9 14.6 50.3 2.01
1.5 0.764 61.7 12.8 47.1 1.77
1.4 0.877 50.2 11.2 44.0 1.54
1.3 1.02 40.2 9.62 40.8 1.33
1.2 1.19 31.6 8.20 37.7 1.13
1.1 1.42 24.3 6.89 34.6 0.950
1.0 1.72 18.3 5.69 31.4 0.785
0.95 1.90 15.7 5.14 29.8 0.709
0.90 2.12 13.3 4.61 28.3 0.636
0.85 2.38 11.2 4.11 26.7 0.567
0.80 2.69 9.36 3.64 25.1 0.503
0.75 3.06 7.71 3.20 23.6 0.442
0.70 3.51 6.27 2.79 22.0 0.385
0.65 4.07 5.02 2.41 20.4 0.332
0.60 4.77 3.95 2.05 18.8 0.283
0.55 5.68 3.04 1.72 17.3 0.238
0.50 6.88 2.28 1.42 15.7 0.196
0.45 8.49 1.67 1.15 14.1 0.159
0.42 9.74 1.35 1.00 13.2 0.139
0.40 10.7 1.17 0.911 12.6 0.126
0.35 14.0 0.784 0.698 11.0 0.0962
0.32 16.8 0.599 0.583 10.1 0.0804
0.30 19.1 0.493 0.512 9.42 0.0707
0.28 21.9 0.401 0.446 8.80 0.061
0.25 27.5 0.286 0.356 7.85 0.0491
0.22 35.5 0.195 0.276 6.91 0.0380
0.20 43.0 0.146 0.228 6.28 0.0314
0.19 47.6 0.125 0.206 5.97 0.0284
0.18 53.1 0.107 0.184 5.65 0.0254
0.17 59.5 0.0898 0.165 5.34 0.0227
0.16 67.1 0.0749 0.146 5.03 0.0201
0.15 76.4 0.0617 0.128 4.71 0.0177
0.14 87.7 0.0502 0.112 4.40 0.0154
0.13 102 0.0402 0.0962 4.08 0.0133

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Alkrothal®

Wire dimensions and properties

Resistivity 1.25 Ω mm2/m (744 Ω/cmf). Density 7.28 g /cm3 (0.263 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100
Ct 1.00 1.00 1.02 1.03 1.04 1.05 1.08 1.09 1.10 1.11 1.11 1.12
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
6.5 0.0377 5421 242 204 33.2
6.0 0.0442 4264 206 188 28.3
5.5 0.0526 3284 173 173 23.8
5.0 0.0637 2467 143 157 19.6
4.75 0.0705 2115 129 149 17.7
4.5 0.0786 1799 116 141 15.9
4.25 0.0881 1515 103 134 14.2
4.0 0.0995 1263 91.5 126 12.6
3.75 0.113 1041 80.4 118 11.0
3.5 0.130 846 70.0 110 9.62
3.25 0.151 678 60.4 102 8.30
3.0 0.177 533 51.5 94.2 7.07
2.8 0.203 433 44.8 88.0 6.16
2.6 0.235 347 38.7 81.7 5.31
2.5 0.255 308 35.7 78.5 4.91
2.2 0.329 210 27.7 69.1 3.80
2.0 0.398 158 22.9 62.8 3.14
1.9 0.441 135 20.6 59.7 2.84
1.8 0.491 115 18.5 56.5 2.54
1.7 0.551 97.0 16.5 53.4 2.27
1.6 0.622 80.9 14.6 50.3 2.01
1.5 0.707 66.6 12.9 47.1 1.77
1.4 0.812 54.2 11.2 44.0 1.54
1.3 0.942 43.4 9.66 40.8 1.33
1.2 1.11 34.1 8.23 37.7 1.13
1.1 1.32 26.3 6.92 34.6 0.95
1.0 1.59 19.7 5.72 31.4 0.785
0.95 1.76 16.9 5.16 29.8 0.709
0.90 1.96 14.4 4.63 28.3 0.636
0.85 2.20 12.1 4.13 26.7 0.567
0.80 2.49 10.1 3.66 25.1 0.503
0.75 2.83 8.33 3.22 23.6 0.442
0.70 3.25 6.77 2.80 22.0 0.385
0.65 3.77 5.42 2.42 20.4 0.332
0.60 4.42 4.26 2.06 18.8 0.283
0.55 5.26 3.28 1.73 17.3 0.238
0.50 6.37 2.47 1.43 15.7 0.196
0.475 7.05 2.12 1.29 14.9 0.177
0.45 7.86 1.80 1.16 14.1 0.159
0.425 8.81 1.52 1.03 13.4 0.142
0.40 9.95 1.26 0.915 12.6 0.126
0.375 11.3 1.04 0.804 11.8 0.110
0.35 13.0 0.846 0.700 11.0 0.0962
0.32 15.5 0.647 0.585 10.1 0.0804
0.30 17.7 0.533 0.515 9.42 0.0707
0.28 20.3 0.433 0.448 8.80 0.0616
0.26 23.5 0.347 0.387 8.17 0.0531
0.25 25.5 0.308 0.357 7.85 0.0491
0.24 27.6 0.273 0.329 7.54 0.0452
0.23 30.1 0.240 0.302 7.23 0.0415
0.22 32.9 0.210 0.277 6.91 0.0380
0.21 36.1 0.183 0.252 6.60 0.0346
0.20 39.8 0.158 0.229 6.28 0.0314
0.19 44.1 0.135 0.206 5.97 0.0284
0.18 49.1 0.115 0.185 5.65 0.0254
0.17 55.1 0.0970 0.165 5.34 0.0227
0.16 62.2 0.0809 0.146 5.03 0.0201
0.15 70.7 0.0666 0.129 4.71 0.0177
0.14 81.2 0.0542 0.112 4.40 0.0154
0.13 94.2 0.0434 0.0966 4.08 0.0133

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Nikrothal® 80, Nikrothal® TE and Nikrothal® 70

Wire dimensions and properties

Nikrothal® 80: Resistivity 1.09 Ω mm2/m (655 Ω/cmf). Density 8.30 g /cm3 (0.300 lb/in3).

Nikrothal® TE: Resistivity 1.19 Ω mm2/m (716 Ω/cmf). Density 8.10 g /cm3 (0.293 lb/in3).

Nikrothal® 70: Resistivity 1.18 Ω mm2/m (709 Ω/cmf). Density 8.10 g /cm3 (0.293 lb/in3).

To obtain resistance at working temperature, multiply by the factor Ct in the following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100 1200
Nikrothal® 80 Ct 1.00 1.01 1.02 1.03 1.04 1.05 1.04 1.04 1.04 1.04 1.05 1.06 1.07
Nikrothal® TE Ct 1.00 1.02 1.03 1.04 1.05 1.06 1.06 1.06 1.06 1.06 1.07 1.07 1.08
Nikrothal® 70  Ct 1.00 1.01 1.02 1.03 1.04 1.05 1.05 1.04 1.04 1.04 1.05 1.06 1.06

For different alloys, multiply the figures in the table with:

Alloy Resistance at 20°C, Ω/m Surface area per Ω , cm2/Ω Weight, g/m
Nikrothal® TE 1.092 0.916 0.976
Nikrothal® 70 1.083 0.924 0.976
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
10 0.0139 22637 652 314 78.5
9.5 0.0154 19408 588 298 70.9
9.0 0.0171 16502 528 283 63.6
8.25 0.0204 12711 444 259 53.5
8.0 0.0217 11590 417 251 50.3
7.5 0.0247 9550 367 236 44.2
7.0 0.0283 7764 319 220 38.5
6.5 0.0328 6217 275 204 33.2
6.0 0.0386 4890 235 188 28.3
5.83 0.0408 4486 222 183 26.7
5.5 0.0459 3766 197 173 23.8
5.0 0.0555 2830 163 157 19.6
4.75 0.0615 2426 147 149 17.7
4.5 0.0685 2063 132 141 15.9
4.25 0.0768 1738 118 134 14.2
4.0 0.0867 1449 104 126 12.6
3.75 0.0987 1194 91.7 118 11.0
3.65 0.104 1101 86.8 115 10.5
3.5 0.113 971 79.9 110 9.62
3.25 0.131 777 68.9 102 8.30
3.0 0.154 611 58.7 94.2 7.07
2.8 0.177 497 51.1 88.0 6.16
2.6 0.205 398 44.1 81.7 5.31
2.5 0.222 354 40.7 78.5 4.91
2.3 0.262 275 34.5 72.3 4.15
2.0 0.347 181 26.1 62.8 3.14
1.8 0.428 132 21.1 56.5 2.54
1.6 0.542 92.7 16.7 50.3 2.01
1.5 0.617 76.4 14.7 47.1 1.77
1.4 0.708 62.1 12.8 44.0 1.54
1.3 0.821 49.7 11.0 40.8 1.33
1.2 0.964 39.1 9.39 37.7 1.13
1.0 1.39 22.6 6.52 31.4 0.785
0.95 1.54 19.4 5.88 29.8 0.709
0.90 1.71 16.5 5.28 28.3 0.636
0.85 1.92 13.9 4.71 26.7 0.567
0.80 2.17 11.6 4.17 25.1 0.503
0.75 2.47 9.55 3.67 23.6 0.442
0.70 2.83 7.76 3.19 22.0 0.385
0.65 3.28 6.22 2.75 20.4 0.332
0.60 3.86 4.89 2.35 18.8 0.283
0.55 4.59 3.77 1.97 17.3 0.238
0.50 5.55 2.83 1.63 15.7 0.196
0.45 6.85 2.06 1.32 14.1 0.159
0.40 8.67 1.45 1.04 12.6 0.126
0.35 11.3 0.971 0.799 11.0 0.0962
0.32 13.6 0.742 0.668 10.1 0.0804
0.30 15.4 0.611 0.587 9.42 0.0707
0.28 17.7 0.497 0.511 8.80 0.0616
0.25 22.2 0.354 0.407 7.85 0.0491
0.22 28.7 0.241 0.316 6.91 0.0380
0.20 34.7 0.181 0.261 6.28 0.0314
0.19 38.4 0.155 0.235 5.97 0.0284
0.18 42.8 0.132 0.211 5.65 0.0254
0.17 48.0 0.111 0.188 5.34 0.0227
0.16 54.2 0.0927 0.167 5.03 0.0201
0.15 61.7 0.0764 0.147 4.71 0.0177
0.14 70.8 0.0621 0.128 4.40 0.0154
0.13 82.1 0.0497 0.110 4.08 0.0133

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Nikrothal® 60

Wire dimensions and properties

Resistivity 1.11 Ω mm2/m (668 Ω/cmf). Density 8.20 g /cm3 (0.296 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100 1200
Ct 1.00 1.02 1.04 1.05 1.06 1.08 1.09 1.09 1.10 1.10 1.11 1.12 1.13
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
6.0 0.0393 4801 232 188 28.3
5.5 0.0467 3698 195 173 23.8
5.0 0.0565 2779 161 157 19.6
4.75 0.0626 2382 145 149 17.7
4.5 0.0698 2026 130 141 15.9
4.25 0.0782 1706 116 134 14.2
4.0 0.0883 1423 103 126 12.6
3.75 0.101 1172 90.6 118 11.0
3.5 0.115 953 78.9 110 9.62
3.25 0.134 763 68.0 102 8.30
3.0 0.157 600 58.0 94.2 7.07
2.8 0.180 488 50.5 88.0 6.16
2.6 0.209 391 43.5 81.7 5.31
2.5 0.226 347 40.3 78.5 4.91
2.2 0.292 237 31.2 69.1 3.80
2.0 0.353 178 25.8 62.8 3.14
1.9 0.391 152 23.2 59.7 2.84
1.8 0.436 130 20.9 56.5 2.54
1.7 0.489 109 18.6 53.4 2.27
1.6 0.552 91.0 16.5 50.3 2.01
1.5 0.628 75.0 14.5 47.1 1.77
1.4 0.721 61.0 12.6 44.0 1.54
1.3 0.836 48.8 10.9 40.8 1.33
1.2 0.981 38.4 9.27 37.7 1.13
1.1 1.17 29.6 7.79 34.6 0.950
1.0 1.41 22.2 6.44 31.4 0.785
0.95 1.57 19.1 5.81 29.8 0.709
0.90 1.74 16.2 5.22 28.3 0.636
0.85 1.96 13.7 4.65 26.7 0.567
0.80 2.21 11.4 4.12 25.1 0.503
0.75 2.51 9.38 3.62 23.6 0.442
0.70 2.88 7.62 3.16 22.0 0.385
0.65 3.35 6.10 2.72 20.4 0.332
0.60 3.93 4.80 2.32 18.8 0.283
0.55 4.67 3.70 1.95 17.3 0.238
0.50 5.65 2.78 1.61 15.7 0.196
0.475 6.26 2.38 1.45 14.9 0.177
0.45 6.98 2.03 1.30 14.1 0.159
0.425 7.82 1.71 1.16 13.4 0.142
0.40 8.83 1.42 1.03 12.6 0.126
0.375 10.1 1.17 0.906 11.8
0.35 11.5 0.953 0.789 11.0
0.32 13.8 0.728 0.659 10.1
0.30 15.7 0.600 0.580 9.42
0.28 18.0 0.488 0.505 8.80
0.26 20.9 0.391 0.435 8.17
0.25 22.6 0.347 0.403 7.85
0.24 24.5 0.307 0.371 7.54
0.23 26.7 0.270 0.341 7.23
0.22 29.2 0.237 0.312 6.91
0.21 32.0 0.206 0.284 6.60
0.20 35.3 0.178 0.258 6.28
0.19 39.1 0.152 0.232 5.97
0.18 43.6 0.130 0.209 5.65
0.17 48.9 0.109 0.186 5.34
0.16 55.2 0.0910 0.165 5.03
0.15 62.8 0.0750 0.145 4.71
0.14 72.1 0.0610 0.126 4.40
0.13 83.6 0.0488 0.109 4.08

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Nikrothal® 40 and Nikrothal® 20

Wire dimensions and properties

Nikrothal® 40: Resistivity 1.04 Ω mm2/m (626 Ω/cmf). Density 7.90 g /cm3 (0.285 lb/in3).

Nikrothal® 20: Resistivity 0.95 Ω mm2/m (572 Ω/cmf). Density 7.80 g /cm3 (0.281 lb/in3).

To obtain resistance at working temperature, multiply by the factor Ct in the following table.

°C 20 100 200 300 400 500 600 700 800 900 1000 1100
Nikrothal® 40 Ct 1.00 1.03 1.06 1.10 1.12 1.15 1.17 1.19 1.21 1.22 1.23 1.24
Nikrothal® 20  Ct 1.00 1.04 1.10 1.14 1.17 1.21 1.12 1.16 1.28 1.30 1.32 1.34

For different alloys, multiply the figures in the table with:

Alloy Resistance at 20°C, Ω/m Surface area per Ω , cm2/Ω Weight, g/m
Nikrothal® 20 0.913 1.095 0.987
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
10 0.0139 22637 652 314 78.5
9.5 0.0154 19408 588 298 70.9
9.0 0.0171 16502 528 283 63.6
8.25 0.0204 12711 444 259 53.5
8.0 0.0217 11590 417 251 50.3
7.5 0.0247 9550 367 236 44.2
7.0 0.0283 7764 319 220 38.5
6.5 0.0328 6217 275 204 33.2
6.0 0.0386 4890 235 188 28.3
5.83 0.0408 4486 222 183 26.7
5.5 0.0459 3766 197 173 23.8
5.0 0.0555 2830 163 157 19.6
4.75 0.0615 2426 147 149 17.7
4.5 0.0685 2063 132 141 15.9
4.25 0.0768 1738 118 134 14.2
4.0 0.0867 1449 104 126 12.6
3.75 0.0987 1194 91.7 118 11.0
3.65 0.104 1101 86.8 115 10.5
3.5 0.113 971 79.9 110 9.62
3.25 0.131 777 68.9 102 8.30
3.0 0.154 611 58.7 94.2 7.07
2.8 0.177 497 51.1 88.0 6.16
2.6 0.205 398 44.1 81.7 5.31
2.5 0.222 354 40.7 78.5 4.91
2.3 0.262 275 34.5 72.3 4.15
2.0 0.347 181 26.1 62.8 3.14
1.8 0.428 132 21.1 56.5 2.54
1.6 0.542 92.7 16.7 50.3 2.01
1.5 0.617 76.4 14.7 47.1 1.77
1.4 0.708 62.1 12.8 44.0 1.54
1.3 0.821 49.7 11.0 40.8 1.33
1.2 0.964 39.1 9.39 37.7 1.13
1.0 1.39 22.6 6.52 31.4 0.785
0.95 1.54 19.4 5.88 29.8 0.709
0.90 1.71 16.5 5.28 28.3 0.636
0.85 1.92 13.9 4.71 26.7 0.567
0.80 2.17 11.6 4.17 25.1 0.503
0.75 2.47 9.55 3.67 23.6 0.442
0.70 2.83 7.76 3.19 22.0 0.385
0.65 3.28 6.22 2.75 20.4 0.332
0.60 3.86 4.89 2.35 18.8 0.283
0.55 4.59 3.77 1.97 17.3 0.238
0.50 5.55 2.83 1.63 15.7 0.196
0.45 6.85 2.06 1.32 14.1 0.159
0.40 8.67 1.45 1.04 12.6 0.126
0.35 11.3 0.971 0.799 11.0 0.0962
0.32 13.6 0.742 0.668 10.1 0.0804
0.30 15.4 0.611 0.587 9.42 0.0707
0.28 17.7 0.497 0.511 8.80 0.0616
0.25 22.2 0.354 0.407 7.85 0.0491
0.22 28.7 0.241 0.316 6.91 0.0380
0.20 34.7 0.181 0.261 6.28 0.0314
0.19 38.4 0.155 0.235 5.97 0.0284
0.18 42.8 0.132 0.211 5.65 0.0254
0.17 48.0 0.111 0.188 5.34 0.0227
0.16 54.2 0.0927 0.167 5.03 0.0201
0.15 61.7 0.0764 0.147 4.71 0.0177
0.14 70.8 0.0621 0.128 4.40 0.0154
0.13 82.1 0.0497 0.110 4.08 0.0133

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Nifethal® 70

Wire dimensions and properties

Resistivity 0.20 Ω mm2/m (120 Ω/cmf). Density 8.45 g /cm3 (0.305 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 150 200 250 300 350 400 450 500
Ct 1.00 1.42 1.68 1.91 2.19 2.47 2.75 3.03 3.34 3.66
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
1.8 0.0786 719 21.5 56.5 2.54
1.7 0.0881 606 19.2 53.4 2.27
1.6 0.0995 505 17.0 50.3 2.01
1.5 0.113 416 14.9 47.1 1.77
1.4 0.130 339 13.0 44.0 1.54
1.3 0.151 271 11.2 40.8 1.33
1.2 0.177 213 9.56 37.7 1.13
1.1 0.210 164 8.03 34.6 0.950
1.0 0.255 123 6.64 31.4 0.785
0.95 0.282 106 5.99 29.8 0.709
0.90 0.314 89.9 5.38 28.3 0.636
0.85 0.352 75.8 4.79 26.7 0.567
0.80 0.398 63.2 4.25 25.1 0.503
0.75 0.453 52.0 3.73 23.6 0.442
0.70 0.520 42.3 3.25 22.0 0.385
0.65 0.603 33.9 2.80 20.4 0.332
0.60 0.707 26.6 2.39 18.8 0.283
0.55 0.842 20.5 2.01 17.3 0.238
0.50 1.02 15.4 1.66 15.7 0.196
0.475 1.13 13.2 1.50 14.9 0.177
0.45 1.26 11.2 1.34 14.1 0.159
0.425 1.41 9.47 1.20 13.4 0.142
0.40 1.59 7.90 1.06 12.6 0.126
0.375 1.81 6.51 0.933 11.8 0.110
0.35 2.08 5.29 0.813 11.0 0.0962
0.32 2.49 4.04 0.680 10.1 0.0804
0.30 2.83 3.33 0.597 9.42 0.0707
0.28 3.25 2.71 0.520 8.80 0.0616
0.26 3.77 2.17 0.449 8.17 0.0531
0.25 4.07 1.93 0.415 7.85 0.0491
0.24 4.42 1.71 0.382 7.54 0.0452
0.23 4.81 1.50 0.351 7.23 0.0415
0.22 5.26 1.31 0.321 6.91 0.0380
0.21 5.77 1.14 0.293 6.60 0.0346
0.20 6.37 0.987 0.265 6.28 0.0314
0.19 7.05 0.846 0.240 5.97 0.0284
0.18 7.86 0.719 0.215 5.65 0.0254
0.17 8.81 0.606 0.192 5.34 0.0227
0.16 9.95 0.505 0.170 5.03 0.0201
0.15 11.3 0.416 0.149 4.71 0.0177
0.14 13.0 0.339 0.130 4.40 0.0154
0.13 15.1 0.271 0.112 4.08 0.0133
0.12 17.7 0.213 0.0956 3.77 0.0113
0.11 21.0 0.164 0.0803 3.46 0.00950
0.10 25.5 0.123 0.0664 3.14 0.00785

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Nifethal® 52

Wire dimensions and properties

Resistivity 0.43 Ω mm2/m (220 Ω/cmf). Density 8.20 g /cm3 (0.296 lb/in3).

To obtain resistivity at working temperature, multiply by factor Ct in following table.

°C 20 100 150 200 250 300 350 400 450 500
Ct 1.00 1.33 1.53 1.73 1.93 2.13 2.32 2.49 2.64 2.77
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
1.8 0.169 335 20.9 56.5 2.54
1.7 0.189 282 18.6 53.4 2.27
1.6 0.214 235 16.5 50.3 2.01
1.5 0.243 194 14.5 47.1 1.77
1.4 0.279 157 12.6 44.0 1.54
1.3 0.324 126 10.9 40.8 1.33
1.2 0.380 99.2 9.27 37.7 1.13
1.1 0.452 76.4 7.79 34.6 0.950
1.0 0.547 57.4 6.44 31.4 0.785
0.95 0.607 49.2 5.81 29.8 0.709
0.90 0.676 41.8 5.22 28.3 0.636
0.85 0.758 35.2 4.65 26.7 0.567
0.80 0.855 29.4 4.12 25.1 0.503
0.75 0.973 24.2 3.62 23.6 0.442
0.70 1.12 19.7 3.16 22.0 0.385
0.65 1.30 15.8 2.72 20.4 0.332
0.60 1.52 12.4 2.32 18.8 0.283
0.55 1.81 9.55 1.95 17.3 0.238
0.50 2.19 7.17 1.61 15.7 0.196
0.475 2.43 6.15 1.45 14.9 0.177
0.45 2.70 5.23 1.30 14.1 0.159
0.425 3.03 4.40 1.16 13.4 0.142
0.40 3.42 3.67 1.030 12.6 0.126
0.375 3.89 3.03 0.906 11.8 0.110
0.35 4.47 2.46 0.789 11.0 0.0962
0.32 5.35 1.88 0.659 10.1 0.0804
0.30 6.08 1.55 0.580 9.42 0.0707
0.28 6.98 1.26 0.505 8.80 0.0616
0.26 8.10 1.01 0.435 8.17 0.0531
0.25 8.76 0.897 0.403 7.85 0.0491
0.24 9.51 0.793 0.371 7.54 0.0452
0.23 10.3 0.698 0.341 7.23 0.0415
0.22 11.3 0.611 0.312 6.91 0.0380
0.21 12.4 0.531 0.284 6.60 0.0346
0.20 13.7 0.459 0.258 6.28 0.0314
0.19 15.2 0.394 0.232 5.97 0.0284
0.18 16.9 0.335 0.209 5.65 0.0254
0.17 18.9 0.282 0.186 5.34 0.0227
0.16 21.4 0.235 0.165 5.03 0.0201
0.15 24.3 0.194 0.145 4.71 0.0177
0.14 27.9 0.157 0.126 4.40 0.0154
0.13 32.4 0.126 0.1088 4.08 0.0133
0.12 38.0 0.0992 0.0927 3.77 0.0113
0.11 45.2 0.0764 0.0779 3.46 0.00950
0.10 54.7 0.0574 0.0644 3.14 0.00785

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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Cuprothal®

Wire dimensions and properties

Cuprothal® 49: Resistivity 0.49 Ω mm2/m (295 Ω/cmf). Density 8.90 g /cm3 (0.321 lb/in3).

Cuprothal® 30: Resistivity 0.30 Ω mm2/m (180 Ω/cmf). Density 8.90 g /cm3 (0.321 lb/in3).

Cuprothal® 15: Resistivity 0.15 Ω mm2/m (90 Ω/cmf). Density 8.90 g /cm3 (0.321 lb/in3).

Cuprothal® 10: Resistivity 0.10 Ω mm2/m (60 Ω/cmf). Density 8.90 g /cm3 (0.321 lb/in3).

Cuprothal® 05: Resistivity 0.05 Ω mm2/m (30 Ω/cmf). Density 8.90 g /cm3 (0.321 lb/in3).

To obtain resistance at working temperature, multiply by the factor Ct in the following table.

°C 20 100 200 300 400 500 600
Cuprothal® 49 Ct 1.000 1.002 1.002 1.001 1.005 1.017 1.037
Cuprothal® 30 Ct 1.000 1.020 1.030 1.040 1.060 – –
Cuprothal® 15 Ct 1.000 1.035 1.070 1.110 1.150 – –
Cuprothal® 10 Ct 1.000 1.060 1.110 1.190 – – –
Cuprothal® 05 Ct 1.000 1.110 1.250 1.400 – – –

For different alloys, multiply the figures in the table with:

Alloy Resistance at 20°C, Ω/m Surface area per Ω , cm2/Ω Weight, g/m
Cuprothal® 49 1.0 1.0 1.0
Cuprothal® 30 0.612 1.63 1.0
Cuprothal® 15 0.306 3.29 1.0
Cuprothal® 10 0.204 4.93 1.0
Cuprothal® 05 0.102 9.86 1.0
Diameter Resistance at 20°C Resistance at 20°C Weight Surface area Cross sectional area
mm Ω/m cm2/Ω* g/m cm2/m mm2
10 0.0062 50355 699 314 78.5
9.5 0.0069 43173 631 298 70.9
9.0 0.0077 36709 566 283 63.6
8.25 0.0092 28275 476 259 53.5
8.0 0.0097 25782 447 251 50.3
7.5 0.0111 21244 393 236 44.2
7.35 0.0115 19994 378 231 42.4
7.0 0.0127 17272 343 220 38.5
6.5 0.0148 13829 295 204 33.2
6.0 0.0173 10877 252 188 28.3
5.5 0.0206 8378 211 173 23.8
5.0 0.0250 6294 175 157 19.6
4.75 0.0277 5397 158 149 17.7
4.5 0.0308 4589 142 141 15.9
4.25 0.0345 3866 126 134 14.2
4.0 0.0390 3223 112 126 12.6
3.75 0.0444 2655 98.3 118 11.0
3.5 0.0509 2159 85.6 110 9.62
3.25 0.0591 1729 73.8 102 8.30
3.0 0.0693 1360 62.9 94.2 7.07
2.8 0.0796 1105 54.8 88.0 6.16
2.6 0.0923 885 47.3 81.7 5.31
2.5 0.100 787 43.7 78.5 4.91
2.2 0.129 536 33.8 69.1 3.80
2.0 0.156 403 28.0 62.8 3.14
1.9 0.173 345 25.2 59.7 2.84
1.8 0.193 294 22.6 56.5 2.54
1.7 0.216 247 20.2 53.4 2.27
1.6 0.244 206 17.9 50.3 2.01
1.5 0.277 170 15.7 47.1 1.77
1.4 0.318 138 13.7 44.0 1.54
1.3 0.369 111 11.8 40.8 1.33
1.2 0.433 87.0 10.1 37.7 1.13
1.1 0.516 67.0 8.46 34.6 0.950
1.0 0.624 50.4 6.99 31.4 0.785
0.95 0.691 43.2 6.31 29.8 0.709
0.90 0.770 36.7 5.66 28.3 0.636
0.85 0.864 30.9 5.05 26.7 0.567
0.80 0.975 25.8 4.47 25.1 0.503
0.75 1.11 21.2 3.93 23.6 0.442
0.70 1.27 17.3 3.43 22.0 0.385
0.65 1.48 13.8 2.95 20.4 0.332
0.60 1.73 10.9 2.52 18.8 0.283
0.55 2.06 8.38 2.11 17.3 0.238
0.50 2.50 6.29 1.75 15.7 0.196
0.475 2.77 5.40 1.58 14.9 0.177
0.45 3.08 4.59 1.42 14.1 0.159
0.425 3.45 3.87 1.26 13.4 0.142
0.40 3.90 3.22 1.12 12.6 0.126
0.375 4.44 2.66 0.983 11.8
0.35 5.09 2.16 0.856 11.0
0.32 6.09 1.65 0.716 10.1
0.30 6.93 1.36 0.629 9.42
0.28 7.96 1.11 0.548 8.80
0.26 9.23 0.885 0.473 8.17
0.25 10.0 0.787 0.437 7.85
0.24 10.8 0.696 0.403 7.54
0.23 11.8 0.613 0.370 7.23
0.22 12.9 0.536 0.338 6.91
0.21 14.1 0.466 0.308 6.60
0.20 15.6 0.403 0.280 6.28
0.19 17.3 0.345 0.252 5.97
0.18 19.3 0.294 0.226 5.65
0.17 21.6 0.247 0.202 5.34
0.16 24.4 0.2063 0.179 5.03
0.15 27.7 0.1699 0.157 4.71
0.14 31.8 0.1382 0.137 4.40
0.13 36.9 0.1106 0.118 4.08

* cm2/Ω = I2 × Ct /p (I = Current, Ct = temperature factor, p = surface load W/cm2)

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