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6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
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 for Precision Electronics and Scientific Applications

The 6J40 Constantan flat wire is a specific variant of Constantan, a copper-nickel alloy widely used for its stable electrical resistance and other key properties. This flat wire version is especially used in precision applications such as thermocouples, strain gauges, and resistive elements.

The 6J40 Constantan flat wire is a versatile and reliable material known for its stable electrical resistance, low temperature coefficient, and durability. These key features make it suitable for precision temperature measurement, resistors, strain gauges, and heating elements. Its corrosion resistance, non-magnetic properties, and ability to perform consistently in a wide range of temperatures make it an ideal choice for high-performance applications in industries like electronics, industrial sensors, and scientific instrumentation.

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

  • 6J40 Constantan flat wire has high electrical stability, maintaining a consistent resistance across a wide temperature range. This makes it highly reliable for use in applications requiring stable and predictable resistance over time.

2. Low Temperature Coefficient of Resistance

  • One of the hallmark features of 6J40 Constantan is its low temperature coefficient of resistance (TCR), meaning that its resistance doesn't change much with temperature fluctuations. This is crucial for applications like precision thermocouples, where accurate and stable measurements are necessary despite environmental temperature changes.

3. Alloy Composition (Copper-Nickel)

  • The 6J40 variant consists of approximately 55% copper and 45% nickel. This specific composition offers a balanced combination of electrical conductivity and mechanical strength, making it suitable for long-term and high-performance applications.

4. Excellent Corrosion Resistance

  • 6J40 Constantan offers good resistance to corrosion, making it durable in harsh environments where exposure to moisture, chemicals, or other corrosive elements is common. This feature makes it especially useful in industrial and outdoor applications.

5. Thermoelectric Properties (for Thermocouples)

  • The alloy has excellent thermoelectric properties, which is why 6J40 Constantan flat wire is widely used in thermocouples for temperature sensing. When paired with another metal (like Chromel), it generates a measurable voltage based on the temperature difference between the two metals, making it ideal for accurate temperature measurement.

6. Mechanical Durability and Strength

  • 6J40 Constantan wire is durable and resistant to mechanical wear, making it well-suited for applications requiring reliable long-term performance, such as resistors, strain gauges, and electrical contacts.

7. Ductility and Formability

  • The wire is relatively ductile and can be easily drawn into thin strands or formed into flat wire shapes without compromising its structural integrity. This makes it easy to work with in applications where the wire needs to be shaped or wound, such as precision resistors or heating elements.

8. Non-magnetic

  • 6J40 Constantan is a non-magnetic material, which is an important feature when used in environments where magnetic interference could affect performance, such as in sensitive electronic equipment or instrumentation.

9. High Precision and Accuracy

  • Due to its stable electrical properties and low temperature coefficient, 6J40 Constantan flat wire is used in high-precision applications like resistors, load cells, and strain gauges. The wire ensures accurate readings and consistent performance over time.

10. Wide Temperature Range

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

Applications:

  • Thermocouples: Widely used in industrial temperature sensors.
  • Resistors: For precision resistors in sensitive circuits.
  • Strain Gauges: For measuring strain and force in structural testing.
  • Heating Elements: In applications that require high resistance and heat generation.
  • Load Cells: In weighing systems where precise force measurement is needed.

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 For Precision Electronics And Scientific Applications6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications

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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 For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications
6J40 Constantan Flat Wire For Precision Electronics And Scientific Applications

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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