Heater Ribbon

Resistance Ribbon Type - A | Resistance Ribbon Type - C

Heater Ribbon

Nichrome Ribbon Types

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. The Type A has a lower temperature coefficient of resistance when compared to the Type C resistance ribbon. The Type A resistance ribbon has a usable temperature range up to 1150°C or 2100°F.

Composition

Richards NRC or Type C resistance heating ribbon is composed of 60% Nickel, 16% Chromium, and the balance of 24% Iron. Type C ribbon has a usable temperature range up to 1000°C or 1850°F. It also has a higher coefficient of resistance when compared to the Type A. Both types of ribbon have excellent corrosion resistance.

Applications

The Type C ribbon is very useful in applications where a high resistance is required within a limited space. In heating and technical applications, the Type A ribbon is most commonly used. The Type A and Type C resistance ribbon are both offered in large or small spool sizes.

Specifications

  • Type A and Type C Alloys
  • High Electrical Resistance
  • Excellent Corrosion Resistance
  • Available in thicknesses from .002" to .102"
  • Available in widths from 1/64" to 1.0"

Resistance Table for Type A Ribbon

Nichrome A Ribbon Part Number Example: Part number is NRA then Code 1 then Code 2  NRA0424 has Code 1 as number 04 (thickness of .072") and code 2 has number 24 or (width of 3/8")

Part Number = NRA + Code 1 + Code 2 Ribbon Type A (80% Ni, 20% Cr)            
UnitsInches.0156.0312.0625.0937.1250.1875.2500.3750.5000.6250.75001.000
UnitsFractions (Inches)1/641/321/163/321/83/161/43/81/25/83/41
UnitsMillimeters.397.7941.592.383.184.766.359.5312.715.8819.0525.4
Code 1 ThicknessCode 2Widths
Code 1InchesMillimeters010204060812162432404864
010.1022.590.021280.013330.010.0080.0066670.005
020.0912.310.023850.014950.011210.0089670.0074730.005604
030.0812.060.026790.016790.012590.010070.0083950.006296
040.0721.830.030140.018890.014170.011330.0094440.007083
050.0641.630.045210.033910.021250.015940.012750.010630.007969
060.0571.450.050770.038070.023860.01790.014320.011930.008947
070.0511.2950.056740.042550.026670.020.0160.013330.01
080.0451.1430.06430.048230.030220.022670.018130.015170.01133
090.041.0160.10850.072340.054260.0340.02550.02040.0170.01275
100.0360.9140.12060.080380.060280.037780.028330.022670.018890.01417
110.0320.8130.13560.090430.067820.04250.031880.02550.021250.01594
120.02850.7240.15230.10150.076150.047720.035790.028630.023860.0179
130.02530.64260.17160.11440.085780.053760.040320.032250.026880.02016
140.02260.5740.19210.12040.090270.060180.045130.036110.030090.02257
150.02010.51050.43190.28790.21590.13530.110150.067660.050750.04060.033830.02537
160.01790.45470.4850.32330.24250.1520.1140.075980.056980.045590.037990.02849
170.01590.40391.0920.5460.3640.2730.17110.12830.085540.064150.052320.042770.03208
180.01420.36071.2230.61130.40760.30570.19150.14370.095780.071830.057470.047890.03592
190.01260.321.3780.6890.45930.34450.21590.16190.10790.080950.064760.053970.04048
200.01130.2871.5360.76820.51210.38410.24070.18050.12040.090270.072210.060180.04513
210.010.2543.4721.7360.86810.57870.4340.2720.2040.1360.1020.08180.0680.051
220.00890.22613.9021.9510.97540.65030.48770.30560.22920.15280.11460.091690.07640.0573
230.0080.20324.342.171.0850.72340.61450.340.2550.170.12750.1020.0850.06375
240.00710.18034.8912.4451.2230.81510.69230.38310.28730.19150.14370.11490.095780.07183
250.00630.165.5122.7561.3780.91860.78030.43170.32380.21590.16190.12950.10790.08095
260.00560.14226.2013.11.551.170.87780.48570.36430.24290.18210.14570.12140.09107
270.0050.1276.9453.4721.7361.3110.98310.5440.4080.2720.2040.16320.1360.102
280.00450.11437.7163.8581.9291.4561.0920.60440.45330.30220.22670.18130.15110.1133
290.0040.10168.6814.342.4581.6391.2290.680.510.340.2550.2040.170.1275
300.00350.08899.9214.962.8091.8731.4040.77710.58290.38860.29140.23310.19430.1457
310.00310.078711.25.6013.1712.1141.5860.87740.65810.43870.3290.26320.21940.1645
320.002750.069912.636.3133.5752.3831.7880.98910.74180.49450.37090.29670.24730.1855
330.00250.063513.896.9453.9332.6221.9661.0880.8160.5440.4080.32640.2720.204
340.002250.055915.437.7164.3692.9132.1851.2090.90670.60440.45330.36270.30220.2267
350.0020.050817.369.8314.9163.2772.4581.361.020.680.510.4080.340.255

Resistance Table for Type C Ribbon

Nichrome C Ribbon Part Number Example: Part number is NRA then Code 1 then Code 2  NRC0424 has Code 1 as number 04 (thickness of .072") and code 2 has number 24 or (width of 3/8")

Part Number = NRC + Code 1 + Code 2 Heater Ribbon Type C (60% Ni, 16% Cr, 24% Fe)            
UnitsInches.0156.0312.0625.0937.1250.1875.2500.3750.5000.6250.75001.000
UnitsFractions (Inches)1/641/321/163/321/83/161/43/81/25/83/41
UnitsMillimeters.397.7941.592.383.184.766.359.5312.715.8819.0525.4
ThicknessCode Widths
Code 1InchesMillimeters010204060812162432404864
010.1022.590.022110.013860.010390.0083140.0069280.005196
020.0912.310.024780.015530.011650.0093190.0077660.005824
030.0812.060.027840.017450.013090.010470.0087240.006543
040.0721.830.031320.019630.014720.011780.0098150.007361
050.0641.630.046990.035240.022080.016560.013250.011040.008281
060.0571.450.052760.039570.02480.01860.014880.01240.009298
070.0511.2950.058960.044220.027710.020780.016630.013860.01039
080.0451.1430.066820.050120.031410.023560.018840.01570.01178
090.041.0160.11280.075180.056380.035330.02650.02120.017670.01325
100.0360.9140.12530.083530.062650.039260.029440.023560.019630.01472
110.0320.8130.1410.093970.070480.044170.33130.02650.022080.01656
120.02850.7240.15830.10550.079130.049590.037190.029750.02480.0186
130.02530.64260.17830.11890.089140.055860.04190.033520.027930.02095
140.02260.5740.19960.12510.093810.062540.04690.037520.031270.02345
150.02010.51050.44880.29920.22440.14060.10550.070320.052740.042190.035160.02637
160.01790.45470.5040.3360.2520.15790.11840.078960.059220.047370.039480.02961
170.01590.40391.1350.56740.37830.28370.17780.13330.088890.066670.053330.044440.03333
180.01420.36071.2710.63530.42350.31770.19910.14930.099530.074650.059720.049770.03732
190.01260.321.4320.7160.47730.3580.22430.16830.11220.084130.06730.056090.04006
200.01130.2871.5970.79830.53220.39920.25010.18760.12510.093810.075040.062540.0469
210.010.2543.6091.8040.90210.60140.45110.28270.2120.14130.1060.08480.070670.053
220.00890.22614.0552.0271.0140.67580.50680.31760.23820.15880.11910.095280.07940.05955
230.0080.20324.5112.2551.1280.75180.63860.35330.2650.17670.13250.1060.088330.06625
240.00710.18035.0822.5411.2710.84710.71950.39810.28860.19910.14930.11940.099530.07465
250.00630.165.7282.8641.4320.95460.81090.44870.33650.22430.16830.13460.11220.0841
260.00560.14226.4443.2221.6111.2160.91220.50480.37860.25240.18930.15140.12620.09464
270.0050.1277.2173.6091.8041.3621.0220.56530.4240.26270.2120.16960.14130.106
280.00450.11438.0194.0092.0051.5141.1350.62810.47110.31410.23560.18840.1570.1178
290.0040.10169.0214.5112.5541.7031.2770.70670.530.35330.2650.2120.17670.1325
300.00350.088910.315.1552.9191.9461.460.80760.60570.40380.30290.24230.20190.1514
310.00310.078711.645.823.2962.1971.6480.91180.68390.45590.34190.27350.2280.171
320.002750.069913.126.5613.7152.4771.8581.0280.77090.51390.38550.30840.2570.1927
330.00250.063514.437.2714.0872.7242.0431.1310.8480.56530.4240.33920.28270.212
340.002250.055916.048.0194.5413.0272.271.2560.94220.62810.47110.37690.31410.2356
350.0020.050818.0410.225.1083.4062.5541.4131.060.70670.530.4240.35330.265

Accessories and Related Products

Heater Ribbon

Resistance Heater Ribbon Specifications

Heater Ribbon Type Resistivity Ohms/Sq Mil Foot Density
Type A 510 Ohms/Square mil foot at 68°F .3039 Lbs/Ci
Type C 530 Ohms/Square mil foot at 68°F .2979 Lbs/Ci

Heater Wire