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6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
Specifications
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.
Certification :
ISO9001
Place of Orig :
Jiangsu, China
Type :
Constantan Flat Wire
Application :
Variable Resistor and Strain Sensor
Color :
Silvery White
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

Precision Resistance Wire 6J40 Constantan Flat Wire for Precision Temperature Measurement and Scientific Applications

The 6J40 Constantan flat wire is a specialized form of Constantan, a copper-nickel alloy primarily used in high-precision electrical applications such as thermocouples, resistors, and strain gauges. The 6J40 designation refers to a specific grade or alloy mix within the broader family of Constantan materials, and the flat wire form factor indicates it is shaped for specific uses in applications like precision measurement and temperature sensing.

The flat wire form factor of 6J40 Constantan allows for greater surface area per unit of wire length, making it ideal for applications like heating elements (which require good heat dissipation) and precise measurement applications like strain gauges or resistor networks.

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 offers consistent electrical resistance over a wide range of temperatures, a hallmark of Constantan alloys. This stable resistance makes it ideal for precision electrical applications, especially where resistance must remain constant despite temperature fluctuations.

2. Low Temperature Coefficient of Resistance (TCR)

6J40 Constantan has a low temperature coefficient of resistance, meaning its electrical resistance changes very little with temperature changes. This is critical in applications like thermocouples, resistors, and strain gauges, where temperature-induced resistance variations can lead to measurement errors.

3. Alloy Composition (Copper-Nickel)

6J40 Constantan is typically composed of approximately 55% copper and 45% nickel. This copper-nickel blend provides a balanced mix of good electrical conductivity and excellent mechanical strength, while maintaining low resistance to corrosion.

4. Excellent Corrosion Resistance

6J40 Constantan has excellent resistance to corrosion, particularly in moisture and chemical environments. This makes it suitable for long-term use in challenging conditions, including outdoor or industrial applications where environmental exposure is a factor.

5. Thermoelectric Properties (Thermocouples)

Due to its thermoelectric properties, 6J40 Constantan flat wire is widely used in thermocouples for temperature measurement. When paired with other metals (such as Chromel or Alumel), the wire generates a voltage that is proportional to the temperature difference between the two materials. This makes it ideal for high-precision temperature sensing and temperature control systems.

6. High Durability and Mechanical Strength

The alloy is known for its high tensile strength, which makes 6J40 Constantan flat wire durable and resistant to mechanical stress. It maintains its shape and functionality even under continuous use, making it suitable for applications like resistive heating elements and structural sensors.

7. Ductility and Formability

6J40 Constantan flat wire is ductile, meaning it can be drawn into very fine wires or formed into flat shapes without breaking or becoming brittle. This flexibility makes it suitable for use in wound resistors, strain gauges, and other precision components that require fine manipulation.

8. Non-magnetic Properties

6J40 Constantan is non-magnetic, which is essential for applications where magnetic interference could distort performance, such as in sensitive measuring instruments or electronic devices where external magnetic fields must be minimized.

9. Wide Temperature Range

The material operates effectively across a wide temperature range, typically from -200°C to 250°C (or higher, depending on specific alloy formulations and application conditions). This makes it versatile for use in both low-temperature and high-temperature environments, typical in industrial and scientific settings.

Applications:

  • Thermocouples: Used in temperature sensors to measure heat in industrial, scientific, and laboratory environments.
  • Resistors: Used in precision resistors for circuits that need stable resistance.
  • Strain Gauges: Employed in load cells and force measurement systems, where accurate strain measurement is required.
  • Heating Elements: 6J40 Constantan flat wire is used in resistance heating applications, like in electric ovens, toasters, and industrial heating elements.
  • Load Cells: Employed in weighing systems where precise force measurement is necessary.

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 Temperature Measurement And Scientific Applications6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications

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Product Detail
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
Contact Supplier
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications
6J40 Constantan Flat Wire For Precision Temperature Measurement And Scientific Applications

Jiangyin Chengxin Alloy Material Co., Ltd ，

Verified Supplier
1 Years
jiangsu, changzhou
Since 2003
Business Type :
Manufacturer, Exporter, Seller
Main Products :
Pure Nickel Metal, NiCr Alloy, CuNi Alloy
Total Annual :
230000000-240000000
Employee Number :
1400~1500
Certification Level :
Verified Supplier
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