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6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
Specifications
Brand Name :
Senphus
Model Number :
6J40/6J40X/6J40P/6J40D
Place of Origin :
China
MOQ :
5kg
Price :
--
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
Description

6J40 Constantan Flat Wire Precision Wire for Electronics Manufacturing and Scientific Instrumentation

The 6J40 Constantan flat wire is a specific type of Constantan (a copper-nickel alloy), commonly used in precision applications requiring stable electrical resistance, durability, and resistance to temperature variations. This wire is typically used in applications like thermocouples, resistors, strain gauges, and heating elements, among others.

The 6J40 Constantan flat wire is a versatile material known for its stable electrical resistance, mechanical durability, and corrosion resistance. These key features make it highly suitable for precision applications like thermocouples, resistors, and heating elements where consistent performance and long-term reliability are essential. Its combination of thermoelectric properties, low temperature coefficient, and durability ensures it is an ideal choice for high-precision industrial, scientific, and commercial applications.

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:

1. Stable Electrical Resistance:

  • Constantan is renowned for its stable resistance across a wide temperature range. The 6J40 flat wire variant offers a low temperature coefficient of resistance, which means that its electrical resistance does not change significantly with temperature fluctuations.
  • This makes it ideal for precision applications such as temperature sensors (thermocouples) and resistors where consistent performance is crucial.

2. Alloy Composition:

  • The 6J40 Constantan wire is an alloy of approximately 55% copper and 45% nickel, which provides a balanced combination of electrical properties and mechanical strength. This composition results in a wire that is highly resistant to corrosion and wear, ensuring long-term reliability in demanding environments.

3. Durability and Strength:

  • 6J40 Constantan flat wire is mechanically strong and durable, making it resistant to physical wear and tear. Its ability to withstand high temperatures and stress makes it suitable for use in heating elements, electrical contacts, and other high-performance industrial applications.

4. High Precision and Accuracy:

  • Due to its stable resistance and low temperature coefficient, the 6J40 flat wire is particularly useful in precision measurement applications. It’s commonly used in resistors, strain gauges, and load cells, where accuracy and repeatability are paramount.

5. Corrosion Resistance:

  • The copper-nickel composition gives 6J40 Constantan excellent corrosion resistance, making it suitable for use in environments exposed to moisture, chemicals, or other harsh conditions. This feature is essential in outdoor or industrial applications where the wire may be exposed to environmental stresses.

6. Non-magnetic Properties:

  • Constantan alloys, including 6J40, are non-magnetic, which makes them ideal for applications where magnetic interference needs to be avoided, such as in sensitive electrical devices, instrumentation, or magnetically sensitive environments.

7. Thermoelectric Properties (Thermocouples):

  • Due to its thermoelectric properties, 6J40 Constantan is widely used in thermocouples (temperature sensors), where it is paired with other metals like Chromel (nickel-chromium) to form a temperature-measuring junction. The Seebeck effect generates a voltage based on temperature differences between the metals, which is used to determine temperature.

8. Formability:

  • The flat wire form of 6J40 Constantan makes it easy to shape or wind into various configurations for specific applications. Its ductility allows for easy manipulation, which is beneficial for use in intricate sensor devices, wire-wound resistors, and precision electronics.

9. Temperature Range:

  • 6J40 Constantan can operate effectively across a wide temperature range, typically from -200°C to 250°C (or higher, depending on the specific application), making it suitable for both low and high-temperature environments.

Applications:

  • Thermocouples: Used for temperature measurement in industrial and scientific applications.
  • Resistors and Strain Gauges: Common in high-precision electronics and instrumentation for accurate measurements.
  • Heating Elements: Employed in resistance heating applications where high electrical resistance is needed for heat generation.
  • Load Cells: Used in weighing systems and force measurement instruments.
  • Electrical Components: Used in electrical contacts, precision resistors, and other sensitive components that require stable resistance.

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 Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation

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6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation

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Product Detail
Brand Name :
Senphus
Model Number :
6J40/6J40X/6J40P/6J40D
Place of Origin :
China
MOQ :
5kg
Price :
--
Payment Terms :
T/T, D/P
Contact Supplier
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6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation
6J40 Constantan Flat Wire Precision Wire For Electronics Manufacturing And Scientific Instrumentation

Jiangyin Chengxin Alloy Material Co., Ltd ，

Verified Supplier
2 Years
jiangsu, changzhou
Since 2003
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Inconel Alloy, Monel Alloy, Thermocouple Wire
Total Annual :
230000000-240000000
Employee Number :
1400~1500
Certification Level :
Verified Supplier
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