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6J40 Constantan-Type Copper-Nickel Alloy Resistor Element for Industrial Applications

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6J40 Constantan-Type Copper-Nickel Alloy Resistor Element for Industrial Applications

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Brand Name : Senphus

Model Number : 6J40/6J40X/6J40P/6J40D

Place of Origin : China

MOQ : 5kg

Payment Terms : T/T, D/P

Supply Ability : 30 Tons per day

Delivery Time : 3 days

Packaging Details : Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated.

Place of Orig : Jiangsu, China

Type : Constantan

Application : Variable Resistor and Strain Sensor

Color : Silvery White

Certification : ISO9001

Product name : 6J40 Constantan Wire

Dessity : 8.9g/mm

Temp. Coeff. of resistance : -40~40

Max. working Temp. : 500

Elongation : ≥15

Tensile Strength : ≥390

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6J40 Constantan-Type Copper-Nickel Alloy Resistor Element for Industrial Applications

A constant alloy is a type of metal alloy that is designed to maintain its properties under a wide range of conditions, often focused on maintaining consistent electrical, thermal, or mechanical performance over time. These alloys are commonly used in electrical applications, thermocouples, resistance wires, and heating elements due to their stable properties.

One of the best-known constant alloys is Constantan, a copper-nickel alloy, which is particularly famous for its constant electrical resistance over a wide temperature range.

The defining feature of a constant alloy, like Constantan, is its ability to maintain stable electrical and thermal properties over a wide range of conditions, including temperature fluctuations. These alloys are essential in precise, high-performance applications such as temperature sensing (thermocouples), resistor manufacturing, and heating elements, where consistent and reliable material performance is critical.

Chemical composition

Name Code Main Composition(%) Density
Cu Mn Ni Cr g/mm2
Constantan 6J40 Bal. 1~2 39~41 -- 8.9

Properties

Name Code Resistivity(20℃)(μΩm) Temp.Coeff.Of Resistance (20℃)(α×10-6/℃) (0~100℃) Thermal EMF vs. Copper (μv/℃) Max. Working Temp. (℃) Elongation(%) Tensile Strength(N/mm2)
Constantan 6J40 0.48±0.03 -40~+40 45 ≤500 ≥15 ≥390

Diameter and Tolerance

Diameter 0.02~0.028 0.032~0.10 0.112~0.28 0.315~0.50 0.56~1.0 1.06~1.60 1.70~2.12 2.24~3.00 3.15~4.50
Tolerance ±0.002 ±0.003 ±0.005 ±0.010 ±0.015 ±0.020 ±0.025 ±0.030 ±0.035

Some key features of 6J40 include:

  • High Voltage Capability‌:

The 6J40 is designed to handle high voltage levels, making it suitable for applications requiring substantial electrical input.

  • ‌Robust Current Handling‌:

This component can manage significant current flows, ensuring reliable performance even under heavy loads.

  • ‌Low Noise Operation‌:

The 6J40 operates with minimal noise, which is beneficial for applications where noise interference could be problematic.

  • ‌Stable Performance‌:

It offers stable performance characteristics, ensuring consistent operation over extended periods.

  • ‌Versatile Application‌:

Due to its features, the 6J40 can be used in a variety of applications, including but not limited to power amplification and signal processing.

Note‌:
The 6J40's specific features make it a valuable component in electrical and electronic systems, particularly where high voltage, current handling, and low noise are essential.

Applications:

  • Electronic and Electrical Industry‌: 6J40 alloy is used for manufacturing high-precision electronic components such as resistors, capacitors, and connectors.‌
  • ‌Marine and Ocean Engineering‌: Due to its excellent corrosion resistance, 6J40 alloy is employed in the marine and ocean engineering sectors to produce seawater-resistant parts.‌
  • ‌Petrochemical Industry‌: In the petrochemical field, 6J40 alloy is utilized for manufacturing corrosion-resistant pipelines, valves, and other equipment.‌
  • ‌Aerospace Industry‌: This alloy finds application in the aerospace sector for producing high-temperature and corrosion-resistant components like engine exhaust manifolds.‌
  • ‌Other Uses‌: 6J40 is also suitable for use in AC circuits as precision resistors, sliding resistors, resistance strain gauges, and for thermocouples and thermocouple compensation.‌
  • These diverse applications highlight the versatility and utility of 6J40 alloy across various industries.‌

Constantan (6J40) Technical data of wires

Dia(m) Cross-sectional area(m²) Weight/m (g/m) Resistance/m at 20℃(Ω/m) Dia(m) Cross-sectional area(m²) Weight/m (g/m) Resistance/m at 20℃(Ω/m)
0.020 0.000314 0.00279 1375-1681 0.224 0.03941 0.350 11.4-12.9
0.022 0.000318 0.00337 1136-1389 0.250 0.04909 0.436 9.19-10.37
0.025 0.000491 0.00434 880-1076 0.280 0.06158 0.5468 7.33-8.26
0.028 0.000616 0.00547 702-857 0.315 0.07793 0.6920 5.85-6.47
0.032 0.000804 0.00714 549-645 0.355 0.09898 0.8789 4.61-5.09
0.036 0.001018 0.00904 434-509 0.400 0.12570 1.116 3.63-4.01
0.040 0.001257 0.01116 351-413 0.450 0.15900 1.412 2.87-3.17
0.045 0.001509 0.01412 278-326 0.500 0.19630 1.744 2.32-2.57
0.050 0.001963 0.01744 225-264 0.560 0.24630 2.19 1.87-2.03
0.056 0.002463 0.02187 179-210 0.630 0.31170 2.77 1.48-1.60
0.063 0.003117 0.02768 142-166 0.710 0.39590 3.52 1.16-1.26
0.071 0.003959 0.03516 112-131 0.750 0.44180 3.92 1.04-1.13
0.080 0.005027 0.04464 87.9-103.1 0.800 0.50270 4.46 0.917-0.993
0.090 0.006362 0.05650 69.4-81.5 0.850 0.56740 5.04 0.812-0.880
0.100 0.007854 0.06970 56.2-66.0 0.900 0.63620 5.65 0.724-0.785
0.112 0.009852 0.08749 45.3-52.1 0.950 0.70880 6.29 0.650-0.704
0.125 0.012270 0.10900 36.4-41.9 1.000 0.78540 6.97 0.587-0.636
0.140 0.015390 0.13670 29.0-33.4 1.060 0.88250 7.84 0.522-0.566
0.150 0.017670 0.15690 25.3-29.1 1.120 0.98520 8.75 0.468-0.507
0.160 0.020110 0.17850 22.2-25.5 1.180 1.09400 9.71 0.421-0.456
0.170 0.022700 0.20160 19.7-22.6 1.250 1.22700 10.9 0.375-0.407
0.180 0.025450 0.22600 17.5-20.2 1.320 1.36800 12.15 0.337-0.365
0.190 0.028350 0.25200 15.7-18.1 1.400 1.53900 13.67 0.299-0.324
0.200 0.031420 0.27900 14.4-16.2 1.500 1.76700 15.69 0.261-0.282
0.212 0.035300 0.31350 12.8-14.4 1.600 2.01100 17.86 0.229-0.248

Constantan strip resistance value (Ω/m)

Width


Thickness		 6.3 8.0 10.0 12.5 16.0 20.0 25.0 31.5 40.0
0.180 0.150 　 　 　 　 　 　 　 　
0.200 0.405 　 　 　 　 　 　 　 　
0.224 0.362 0.2850 　 　 　 　 　 　 　
0.250 0.324 0.2550 0.196 　 　 　 　 　 　
0.280 0.289 0.2280 0.175 　 　 　 　 　 　
0.315 0.257 0.2030 0.155 0.124 　 　 　 　 　
0.355 0.228 0.1800 0.138 0.110 　 　 　 　 　
0.400 0.203 0.1600 0.122 0.980 0.0765 　 　 　 　
0.450 0.180 0.1420 0.109 0.0871 0.0680 0.0544 0.0435 　 　
0.500 0.162 0.1280 0.098 0.0784 0.0612 0.0490 0.0392 　 　
0.560 0.145 0.1140 0.0875 0.0700 0.0547 0.0437 0.0350 　 　
0.630 0.129 0.1010 0.0777 0.0622 0.0486 0.0389 0.0311 　 　
0.710 0.114 0.0900 0.0690 0.0552 0.0431 0.0345 0.0276 　 　
0.800 0.101 0.0800 0.0612 0.0490 0.0383 0.0306 0.0245 0.0194 0.0153
0.900 0.090 0.0710 0.0544 0.0435 0.0340 0.0272 0.0218 0.0173 0.0136
1.000 0.081 0.0640 0.0490 0.0392 0.0306 0.0245 0.0196 0.0155 0.0122
1.120 0.072 0.0570 0.0437 0.0350 0.0273 0.0219 0.0175 0.0139 0.0109
1.250 0.065 0.0510 0.0392 0.0313 0.0245 0.0196 0.0157 0.0124 0.0098
1.400 0.058 0.0460 0.0350 0.0280 0.0219 0.0175 0.0140 0.0111 0.0088
1.600 0.051 0.0400 0.0306 0.0245 0.0191 0.0153 0.0122 0.0097 0.0077
1.800 0.045 0.0350 0.0272 0.0218 0.0170 0.0136 0.0109 0.0086 0.00680
2.000 0.041 0.0320 0.0245 0.0196 0.0153 0.0122 0.0098 0.0078 0.0061

Constantan&Manganin wire table

Dia.(mm) Sectional area nominal value(mm2) Resistance per meter (Ω/m)
6J12X 6J8X 6J13X 6J40X
Nominal value(mm) Tolerance Nominal value (Ω/m) Tolerance Nominal value (Ω/m) Tolerance Nominal value (Ω/m) Tolerance Nominal value (Ω/m) Tolerance
0.020 ±0.002 0.000314 1496 ±10% 　 　 　 　 1528 ±10%
0.022 0.000380 1236 1263
0.025 0.000491 957 978
0.028 0.000616 763 780
0.032 ±0.003 0.000804 584 ±8% 　 ±8% 　 ±8% 597 ±8%
0.036 0.001018 462 472
0.040 0.001257 374 382
0.045 0.001590 296 302
0.050 0.001963 239 244
0.056 0.002463 191 195
0.063 0.003117 151 154
0.071 0.003959 119 121
0.080 0.005027 93.5 69.6 87.5 95.5
0.090 0.006362 73.9 55.0 69.2 75.5
0.100 0.007854 59.8 44.6 56.0 61.1
0.112 ±0.005 0.009852 47.7 ±7% 35.5 ±7% 44.7 ±7% 48.7 ±7%
0.125 0.01227 38.3 28.5 35.9 39.1
0.140 0.01539 30.5 22.7 28.6 31.2
0.160 0.02011 23.4 17.4 21.9 23.9
0.180 0.02545 18.5 13.8 17.3 18.9
0.200 ±0.005 0.03142 15.0 ±6% 11.1 ±6% 14.0 ±6% 15.3 ±6%
0.224 0.03941 11.9 8.88 11.2 12.2
0.250 0.04909 9.57 7.13 8.96 9.78
0.280 0.06158 7.63 5.68 7.15 7.80
0.315 ±0.010 0.007793 6.03 ±5% 4.49 ±5% 5.65 ±5% 6.16 ±5%
0.355 0.09898 4.75 3.54 4.45 4.85
0.400 0.1257 3.74 2.79 3.50 3.82
0.450 0.1590 2.96 2.20 2.77 3.02
0.500 ±0.015 0.1963 2.39 ±4% 1.78 ±4% 2.24 ±4% 2.44 ±4%
0.560 0.2463 1.91 1.42 1.79 1.95
0.630 0.3117 1.51 1.12 1.41 1.51
0.710 0.3959 1.19 0.884 1.11 1.21
0.750 0.4418 1.06 0.792 1.00 1.09
0.800 0.5027 0.935 0.696 0.875 0.955
0.850 0.5674 0.828 0.617 0.775 0.846
0.900 0.6362 0.739 0.550 0.692 0.755
0.950 0.7088 0.663 0.494 0.621 0.677
1.000 0.7854 0.598 0.446 0.560 0.611
1.060 ±0.020 0.8852 0.533 ±4% 0.397 ±4% 0.499 ±4% 0.544 ±4%
1.120 0.9852 0.477 0.355 0.447 0.487
1.180 1.094 0.430 0.320 0.402 0.439
1.250 1.227 0.383 0.285 0.359 0.391
1.320 1.368 0.343 0.256 0.322 0.351
1.400 1.539 0.305 0.227 0.286 0.312
1.500 1.767 0.266 0.198 0.249 0.272
1.600 2.011 0.234 0.174 0.219 0.239
1.700 ±0.025 2.270 0.207 ±4% 0.154 ±4% 0.194 ±4% 0.211 ±4%
1.800 2.545 0.185 0.138 0.173 0.189
1.900 2.835 0.166 0.123 0.155 0.169
2.000 3.142 0.15 0.111 0.140 0.153
2.120 3.530 0.133 0.0992 0.125 0.136
2.240 ±0.030 3.941 0.119 ±4% 0.0888 ±4% 0.112 ±4% 0.122 ±4%
2.360 4.374 0.107 0.0800 0.101 0.110
2.500 4.909 0.0957 0.0713 0.0896 0.0978
2.650 5.515 0.0852 0.0635 0.0798 0.0870
2.800 6.158 0.0763 0.0568 0.0715 0.0780
3.000 7.069 0.0665 0.0495 0.0622 0.0679
3.150 ±0.035 7.793 0.0603 ±4% 0.0449 ±4% 0.0565 ±4% 0.0616 ±4%
3.350 8.814 0.0533 0.0397 0.0499 0.0545
3.550 9.898 0.0475 0.0354 0.0445 0.0485
3.750 11.04 0.0426 0.0317 0.0398 0.0435
4.000 12.57 0.0374 0.0279 0.0350 0.0382
4.250 14.19 0.0331 0.0247 0.0310 0.0338
4.500 15.90 0.0296 0.0220 0.0277 0.0302
4.750 ±0.040 17.72 0.0265 ±4% 0.0198 ±4% 0.0248 ±4% 0.0271 ±4%
5.000 19.63 0.0239 0.0178 0.0224 0.0244
5.300 ±0.050 22.06 0.0213 ±4% 0.0159 ±4% 0.0199 ±4% 0.0218 ±4%
5.600 24.63 0.0191 0.0142 0.0179 0.0195
6.000 ±0.060 28.27 0.0166 ±4% 0.0124 ±4% 0.0156 ±4% 0.017 ±4%
6.300 31.17 0.0151 0.0112 0.0141 0.0154

6J40 Constantan-Type Copper-Nickel Alloy Resistor Element for Industrial Applications6J40 Constantan-Type Copper-Nickel Alloy Resistor Element for Industrial Applications


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