The Arklay S. Richards Co., Inc. offers two types of resistance heating ribbon. The RICHARDS NRA or Type A resistance heating ribbon is composed of 80% Nickel and 20% Chromium. It has a lower temperature coefficient of resistance when compared to Type C resistance ribbon. The Type A resistance ribbon has a usable temperature range up to 1150°C or 2100°F. The RICHARDS NRC or Type C resistance heating ribbon is composed of 60% Nickel, 16% Chromium, and the balance Iron. The Type C has a usable temperature range up to 1000°C or 1850°F. It has a higher coefficient of resistance when compared to the Type A ribbon. Both types of ribbon have excellent corrosion resistance. The Type C is very useful in applications where a high resistance is required within a limited space. In heating and technical applications, the Type A is most commonly used. The Type A and Type C resistance ribbon are both offered in large or small spool sizes. Phone one of our sales engineers for details.
CHROMEL A- Ribbon NRA
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RESISTANCE - Ohms per foot | ||||||||||||||
THICKNESS | WIDTH | |||||||||||||
1/64 in. | 1/32 in. | 1/16 in. | 1/32 in. | 1/8 in. | 3/16 in. | 1/4 in. | 3/8 in. | 1/2 in. | 5/8 in. | 3/4 in. | 1 in. | |||
Code 1 | Inches | Millimeters | 0.396 | .794 mm | 1.59 mm | 2.38 mm | 3.18 mm | 4.76 mm | 6.35 mm | 9.53 mm | 12.70 mm | 15.88 mm | 19.05 mm | 25.40 mm |
Code 2 | ||||||||||||||
01 | 02 | 03 | 06 | 08 | 12 | 16 | 24 | 32 | 40 | 48 | 64 | |||
01 | 0.102 | 2.59 | .02128 | .01333 | .01000 | .008000 | .006667 | .005000 | ||||||
02 | 0.091 | 2.31 | .02385 | .01495 | .01121 | .008967 | .007473 | .005604 | ||||||
03 | 0.081 | 2.06 | .02679 | .01679 | .01259 | .01007 | .008395 | .006296 | ||||||
04 | 0.072 | 1.83 | .03014 | .01889 | .01417 | .01133 | .009444 | .007083 | ||||||
05 | 0.064 | 1.63 | .04521 | .03391 | .02125 | .01594 | .01275 | .01063 | .007969 | |||||
06 | 0.057 | 1.45 | .05077 | .03807 | .02386 | .01790 | .01432 | .01193 | .008947 | |||||
07 | 0.051 | 1.295 | .05674 | .04255 | .02667 | .02000 | .01600 | .01333 | .01000 | |||||
08 | 0.045 | 1.143 | .06430 | .04823 | .03022 | .02267 | .01813 | .01517 | .01133 | |||||
09 | 0.040 | 1.016 | .1085 | .07234 | .05426 | .03400 | .02550 | .02040 | .01700 | .01275 | ||||
10 | 0.036 | 0.914 | .1206 | .08038 | .06028 | .03778 | .02833 | .02267 | .01889 | .01417 | ||||
11 | 0.032 | 0.813 | .1356 | .09043 | .06782 | .04250 | .03188 | .02550 | .02125 | .01594 | ||||
12 | 0.0285 | 0.724 | .1523 | .1015 | .07615 | .04772 | .03579 | .02863 | .02386 | .01790 | ||||
13 | 0.0253 | 0.6426 | .1716 | .1144 | .08578 | .05376 | .04032 | .03225 | .02688 | .02016 | ||||
14 | 0.0226 | 0.5740 | .1921 | .1204 | .09027 | .06018 | .04513 | .03611 | .03009 | .02257 | ||||
15 | 0.0201 | 0.5105 | .4319 | .2879 | .2159 | .1353 | .11015 | .06766 | .05075 | .04060 | .03383 | .02537 | ||
16 | 0.0179 | 0.4547 | .4850 | .3233 | .2425 | .1520 | .1140 | .07598 | .05698 | .04559 | .03799 | .02849 | ||
17 | 0.0159 | 0.4039 | 1.092 | .5460 | .3640 | .2730 | .1711 | .1283 | .08554 | .06415 | .05232 | .04277 | .03208 | |
18 | 0.0142 | 0.3607 | 1.223 | .6113 | .4076 | .3057 | .1915 | .1437 | .09578 | .07183 | .05747 | .04789 | .03592 | |
19 | 0.0126 | 0.3200 | 1.378 | .6890 | .4593 | .3445 | .2159 | .1619 | .1079 | .08095 | .06476 | .05397 | .04048 | |
20 | 0.0113 | 0.2870 | 1.536 | .7682 | .5121 | .3841 | .2407 | .1805 | .1204 | .09027 | .07221 | .06018 | .04513 | |
21 | 0.0100 | 0.2540 | 3.472 | 1.736 | .8681 | .5787 | .4340 | .2720 | .2040 | .1360 | .1020 | .08160 | .06800 | .05100 |
22 | 0.0089 | 0.2261 | 3.902 | 1.951 | .9754 | .6503 | .4877 | .3056 | .2292 | .1528 | .1146 | .09169 | .07640 | .05730 |
23 | 0.0080 | 0.2032 | 4.340 | 2.170 | 1.085 | .7234 | .6145 | .3400 | .2550 | .1700 | .1275 | .1020 | .08500 | .06375 |
24 | 0.0071 | 0.1803 | 4.891 | 2.445 | 1.223 | .8151 | .6923 | .3831 | .2873 | .1915 | .1437 | .1149 | .09578 | .07183 |
25 | 0.0063 | 0.1600 | 5.512 | 2.756 | 1.378 | .9186 | .7803 | .4317 | .3238 | .2159 | .1619 | .1295 | .1079 | .08095 |
26 | 0.0056 | 0.1422 | 6.201 | 3.100 | 1.550 | 1.170 | .8778 | .4857 | .3643 | .2429 | .1821 | .1457 | .1214 | .09107 |
27 | 0.0050 | 0.1270 | 6.945 | 3.472 | 1.736 | 1.311 | .9831 | .5440 | .4080 | .2720 | .2040 | .1632 | .1360 | .1020 |
28 | 0.0045 | 0.1143 | 7.716 | 3.858 | 1.929 | 1.456 | 1.092 | .6044 | .4533 | .3022 | .2267 | .1813 | .1511 | .1133 |
29 | 0.0040 | 0.1016 | 8.681 | 4.340 | 2.458 | 1.639 | 1.229 | .6800 | .5100 | .3400 | .2550 | .2040 | .1700 | .1275 |
30 | 0.0035 | 0.0889 | 9.921 | 4.960 | 2.809 | 1.873 | 1.404 | .7771 | .5829 | .3886 | .2914 | .2331 | .1943 | .1457 |
31 | 0.0031 | 0.0787 | 11.20 | 5.601 | 3.171 | 2.114 | 1.586 | .8774 | .6581 | .4387 | .3290 | .2632 | .2194 | .1645 |
32 | 0.00275 | 0.0699 | 12.63 | 6.313 | 3.575 | 2.383 | 1.788 | .9891 | .7418 | .4945 | .3709 | .2967 | .2473 | .1855 |
33 | 0.00250 | 0.0635 | 13.89 | 6.945 | 3.933 | 2.622 | 1.966 | 1.088 | .8160 | .5440 | .4080 | .3264 | .2720 | .2040 |
34 | 0.00225 | 0.0559 | 15.43 | 7.716 | 4.369 | 2.913 | 2.185 | 1.209 | .9067 | .6044 | .4533 | .3627 | .3022 | .2267 |
35 | 0.00200 | 0.0508 | 17.36 | 9.831 | 4.916 | 3.277 | 2.458 | 1.360 | 1.020 | .6800 | .5100 | .4080 | .3400 | .2550 |
CHROMEL C- Ribbon NRC
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Resistance - Ohms Per Foot | ||||||||||||||||||||||
THICKNESS | WIDTH | |||||||||||||||||||||
1/64 in. | 1/32 in. | 1/16 in. | 1/32 in. | 1/8 in. | 3/16 in. | 1/4 in. | 3/8 in. | 1/2 in. | 5/8 in. | 3/4 in. | 1 in. | |||||||||||
Code1 | Inches | Millimeters | 0.396 | .794 mm | 1.59 mm | 2.38 mm | 3.18 mm | 4.76 mm | 6.35 mm | 9.53 mm | 12.70 mm | 15.88 mm | 19.05 mm | 25.40 mm | ||||||||
Code 2 | ||||||||||||||||||||||
01 | 02 | 03 | 06 | 08 | 12 | 16 | 24 | 32 | 40 | 48 | 64 | |||||||||||
01 | 0.102 | 2.59 | .02211 | .01386 | .01039 | .008314 | .006928 | .005196 | ||||||||||||||
02 | 0.091 | 2.31 | .02478 | .01553 | .01165 | .009319 | .007766 | .005824 | ||||||||||||||
03 | 0.081 | 2.06 | .02784 | .01745 | .01309 | .01047 | .008724 | .006543 | ||||||||||||||
04 | 0.072 | 1.83 | .03132 | .01963 | .01472 | .01178 | .009815 | .007361 | ||||||||||||||
05 | 0.064 | 1.63 | .04699 | .03524 | .02208 | .01656 | .01325 | .01104 | .008281 | |||||||||||||
06 | 0.057 | 1.45 | .05276 | .03957 | .02480 | .01860 | .01488 | .01240 | .009298 | |||||||||||||
07 | 0.051 | 1.295 | .05896 | .04422 | .02771 | .02078 | .01663 | .01386 | .01039 | |||||||||||||
08 | 0.045 | 1.143 | .06682 | .05012 | .03141 | .02356 | .01884 | .01570 | .01178 | |||||||||||||
09 | 0.040 | 1.016 | .1128 | .07518 | .05638 | .03533 | .02650 | .02120 | .01767 | .01325 | ||||||||||||
10 | 0.036 | 0.914 | .1253 | .08353 | .06265 | .03926 | .02944 | .02356 | .01963 | .01472 | ||||||||||||
11 | 0.032 | 0.813 | .1410 | .09397 | .07048 | .04417 | .03313 | .02650 | .02208 | .01656 | ||||||||||||
12 | 0.0285 | 0.724 | .1583 | .1055 | .07913 | .04959 | .03719 | .02975 | .02480 | .01860 | ||||||||||||
13 | 0.0253 | 0.6426 | .1783 | .1189 | .08914 | .05586 | .04190 | .03352 | .02793 | .02095 | ||||||||||||
14 | 0.0226 | 0.5740 | .1996 | .1251 | .09381 | .06254 | .04690 | .03752 | .03127 | .02345 | ||||||||||||
15 | 0.0201 | 0.5105 | .4488 | .2992 | .2244 | .1406 | .1055 | .07032 | .05274 | .04219 | .03516 | .02637 | ||||||||||
16 | 0.0179 | 0.4547 | .5040 | .3360 | .2520 | .1579 | .1184 | .07896 | .05922 | .04737 | .03948 | .02961 | ||||||||||
17 | 0.0159 | 0.4039 | 1.135 | .5674 | .3783 | .2837 | .1778 | .1333 | .08889 | .06667 | .05333 | .04444 | .03333 | |||||||||
18 | 0.0142 | 0.3607 | 1.271 | .6353 | .4235 | .3177 | .1991 | .1493 | .09953 | .07465 | .05972 | .04977 | .03732 | |||||||||
19 | 0.0126 | 0.3200 | 1.432 | .7160 | .4773 | .3580 | .2243 | .1683 | .1122 | .08413 | .06730 | .05609 | .04006 | |||||||||
20 | 0.0113 | 0.2870 | 1.597 | .7983 | .5322 | .3992 | .2501 | .1876 | .1251 | .09381 | .07504 | .06254 | .04690 | |||||||||
21 | 0.0100 | 0.2540 | 3.609 | 1.804 | .9021 | .6014 | .4511 | .2827 | .2120 | .1413 | .1060 | .08480 | .07067 | .05300 | ||||||||
22 | 0.0089 | 0.2261 | 4.055 | 2.027 | 1.014 | .6758 | .5068 | .3176 | .2382 | .1588 | .1191 | .09528 | .07940 | .05955 | ||||||||
23 | 0.0080 | 0.2032 | 4.511 | 2.255 | 1.128 | .7518 | .6386 | .3533 | .2650 | .1767 | .1325 | .1060 | .08833 | .06625 | ||||||||
24 | 0.0071 | 0.1803 | 5.082 | 2.541 | 1.271 | .8471 | .7195 | .3981 | .2886 | .1991 | .1493 | .1194 | .09953 | .07465 | ||||||||
25 | 0.0063 | 0.1600 | 5.728 | 2.864 | 1.432 | .9546 | .8109 | .4487 | .3365 | .2243 | .1683 | .1346 | .1122 | .08413 | ||||||||
26 | 0.0056 | 0.1422 | 6.444 | 3.222 | 1.611 | 1.216 | .9122 | .5048 | .3786 | .2524 | .1893 | .1514 | .1262 | .09464 | ||||||||
27 | 0.0050 | 0.1270 | 7.217 | 3.609 | 1.804 | 1.362 | 1.022 | .5653 | .4240 | .2827 | .2120 | .1696 | .1413 | .1060 | ||||||||
28 | 0.0045 | 0.1143 | 8.019 | 4.009 | 2.005 | 1.514 | 1.135 | .6281 | .4711 | .3141 | .2356 | .1884 | .1570 | .1178 | ||||||||
29 | 0.0040 | 0.1016 | 9.021 | 4.511 | 2.554 | 1.703 | 1.277 | .7067 | .5300 | .3533 | .2650 | .2120 | .1767 | .1325 | ||||||||
30 | 0.0035 | 0.0889 | 10.31 | 5.155 | 2.919 | 1.946 | 1.460 | .8076 | .6057 | .4038 | .3029 | .22423 | .2019 | .1514 | ||||||||
31 | 0.0031 | 0.0787 | 11.64 | 5.820 | 3.296 | 2.197 | 1.648 | .9118 | .6839 | .4559 | .3419 | .2735 | .2280 | .1710 | ||||||||
32 | 0.00275 | 0.0699 | 13.12 | 6.561 | 3.715 | 2.477 | 1.858 | 1.028 | .7709 | .5139 | .3855 | .3084 | .2570 | .1927 | ||||||||
33 | 0.00250 | 0.0635 | 14.43 | 7.217 | 4.087 | 2.724 | 2.043 | 1.131 | .8480 | .5653 | .4240 | .3392 | .2827 | .2120 | ||||||||
34 | 0.00225 | 0.0559 | 16.04 | 8.019 | 4.541 | 3.027 | 2.270 | 1.256 | .9422 | .6281 | .4711 | .3769 | .3141 | .2356 | ||||||||
35 | 0.00200 | 0.0508 | 18.04 | 10.22 | 5.108 | 3.406 | 2.554 | 1.413 | 1.06 | .7067 | .5300 | .4240 | .3533 | .2650 |
© Copyright 2005 Arklay S. Richards Co., Inc. |