Alloy 290 (Manganin)

Composition Copper: 84%, Manganese: 12%, Nickel: 4%
Resistance 290 ohm-cir-mil/ft 0.0000482 ohm-cm
Maximum Recommended Operating Temperature 572° F 300° C
Melting Point 1868° F 1020° C
Density ( @ 20.0° C/ 68.0° F) 0.296 lb/in³ 8.19 g/cc
Tensile Strength, Ultimate, Annealed 70000 psi 483 MPa
Tensile Strength, Ultimate, Hard Drawn 150000 psi 1034 MPa
Temperature Coefficient of Resistance 0.000015
Magnetic Properties None

Amperage vs. Temperature*

AWG Dia. 100° C 200° C 300° C 400° C 500° C 600° C 700° C
20 0.0320 4.82 6.45 8.35 10.61 13.18 15.91 18.99
21 0.0285 3.92 5.43 7.10 9.01 11.13 13.37 15.86
22 0.0253 3.18 4.57 6.03 7.64 9.38 11.22 13.24
23 0.0226 2.62 3.89 5.18 6.55 8.01 9.54 11.19
24 0.0201 2.15 3.31 4.44 5.61 6.82 8.09 9.45
25 0.0179 1.78 2.83 3.82 4.82 5.84 6.90 8.02
26 0.0159 1.47 2.42 3.29 4.15 5.00 5.89 6.82
27 0.0142 1.24 2.09 2.86 3.60 4.33 5.08 5.87
28 0.0126 1.04 1.80 2.47 3.11 3.73 4.36 5.03
29 0.0113 0.89 1.57 2.17 2.73 3.26 3.81 4.39
30 0.0100 0.76 1.36 1.88 2.36 2.82 3.29 3.79
31 0.0089 0.66 1.19 1.64 2.06 2.46 2.87 3.31
32 0.0080 0.58 1.05 1.46 1.83 2.18 2.54 2.94
33 0.0071 0.51 0.92 1.27 1.60 1.91 2.22 2.58
34 0.0063 0.45 0.81 1.12 1.40 1.67 1.96 2.28
35 0.0056 0.41 0.72 0.98 1.23 1.47 1.73 2.03
36 0.0050 0.37 0.64 0.87 1.09 1.31 1.54 1.82

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Diameter and Resistance

Diameter Resistance
AWG in. mm Min. Nom. Max. LB/KFT FT/LB
8 0.1285 3.2639 0.0167 0.0176 0.0184 45.997 22
9 0.1144 2.9058 0.0211 0.0222 0.0233 36.456 27
10 0.1019 2.5883 0.0265 0.0279 0.0293 28.925 35
11 0.0907 2.3038 0.0335 0.0353 0.0370 22.916 44
12 0.0808 2.0523 0.0422 0.0444 0.0466 18.186 55
13 0.0720 1.8288 0.0531 0.0559 0.0587 14.441 69
14 0.0641 1.6281 0.0671 0.0706 0.0741 11.446 87
15 0.0571 1.4503 0.0845 0.0889 0.0934 9.082 110
16 0.0508 1.2903 0.1068 0.1124 0.1180 7.189 139
17 0.0453 1.1506 0.1343 0.1413 0.1484 5.716 175
18 0.0403 1.0236 0.1696 0.1786 0.1875 4.524 221
19 0.0359 0.9119 0.2138 0.2250 0.2363 3.590 279
20 0.0320 0.8128 0.2690 0.2832 0.2974 2.852 351
21 0.0285 0.7239 0.3392 0.3570 0.3749 2.263 442
22 0.0253 0.6426 0.4304 0.4531 0.4757 1.783 561
23 0.0226 0.5740 0.5394 0.5678 0.5962 1.423 703
24 0.0201 0.5105 0.6819 0.7178 0.7537 1.125 889
25 0.0179 0.4547 0.8598 0.9051 0.9503 0.893 1120
26 0.0159 0.4039 1.0898 1.1471 1.2045 0.704 1420
27 0.0142 0.3607 1.3663 1.4382 1.5101 0.562 1780
28 0.0126 0.3200 1.7353 1.8267 1.9180 0.442 2261
29 0.0113 0.2870 2.1576 2.2711 2.3847 0.356 2811
30 0.0100 0.2540 2.7550 2.9000 3.0450 0.279 3590
31 0.0089 0.2261 3.4781 3.6612 3.8442 0.221 4532
32 0.0080 0.2032 4.3047 4.5313 4.7578 0.178 5609
33 0.0071 0.1803 5.4652 5.7528 6.0405 0.140 7121
34 0.0063 0.1600 6.9413 7.3066 7.6720 0.111 9045
35 0.0056 0.1422 8.7851 9.2474 9.7098 0.087 11447
36 0.0050 0.1270 10.6720 11.6000 12.5280 0.070 14359
37 0.0045 0.1143 13.1753 14.3210 15.4667 0.056 17728
38 0.0040 0.1016 16.6750 18.1250 19.5750 0.045 22437
39 0.0035 0.0889 21.7796 23.6735 25.5673 0.034 29305
40 0.0031 0.0787 27.7627 30.1769 32.5911 0.027 37356
41 0.0028 0.0711 34.0306 36.9898 39.9490 0.022 45789
42 0.0025 0.0635 42.6880 46.4000 50.1120 0.017 57438
43 0.0022 0.0559 55.1240 59.9174 64.7107 0.013 74171
44 0.0020 0.0508 66.7000 72.5000 78.3000 0.011 89747
45 0.00176 0.0447 84.2588 93.6209 102.9830 0.009 115892
46 0.00157 0.0399 105.8866 117.6518 129.4170 0.007 145639
47 0.00140 0.0356 133.1633 147.9592 162.7551 0.005 183156
48 0.00124 0.0315 169.7451 188.6056 207.4662 0.004 233472
49 0.00111 0.0282 211.8335 235.3705 258.9076 0.003 291362
50 0.00099 0.0251 266.2994 295.8882 325.4770 0.003 366275

*Data was recorded from an experiment conducted in a controlled environment. Straight uninsulated wire was heated inside a closed container to limit heat loss due to convection. Thermal imaging camera was used to measure wire temperatures. Your results may vary. Pelican Wire Company (PWC) experimental data is provided strictly “as is” without any other warranty or guaranty of any kind. PWC shall not be liable for any indirect, special, incidental, consequential or punitive loss or damage of any kind, including but not limited to lost profits (regardless of whether or not PWC knows or should know of the possibility of such loss or damages). Any users of this product shall hold harmless and indemnify PWC against any and all loss, damage, injury, liability and claims for injury or death of any person.

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