Custom Machined Constantan Copper Contact Pins for Thermocouplers

Name: Custom Machined Constantan Copper Contact Pins for Thermocouplers
Brand: Shanghai Fine-Boon Science & Technology Co., Ltd.
SKU: Tradewheel_2256518
Availability: InStock

FOB Price 0.45 - 0.5 USD / pieces

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Place of Origin	Shanghai, China	Brand Name	Fine-Boon
Model Number	Tailor-made

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Product Description

Custom Machined Constantan Copper Contact Pins for Thermocouplers

Constantan is also known as Eureka, Advance, and Ferry. It is a copper–nickel alloy, usually is composed of 55% copper and 45% nickel. This alloy has an adequately high strain sensitivity, or gauge factor, which is relatively insensitive to strain level and temperature. Its resistivity (4.9 x 10−7 Ω·m) is high enough to achieve suitable resistance values in even very small grids, and its temperature coefficient of resistance is fairly low. In addition, constantan is characterized by good fatigue life and relatively high elongation capability. However, constantan tends to exhibit a continuous drift at temperatures above 65°C and this characteristic should be taken into account when zero stability of the strain gauge is critical over a period of hours or days.

Constantan is also used for electrical resistance heating and thermocouples. Its main feature is the low thermal variation of its resistivity, which is constant over a wide range of temperatures. In thermocouples, the machined constantan pins are used as negative conductors to fabricate chromel – constantan (Type E), iron – constantan (Type J) and copper – constantan (Type T).

Chromel – constantan thermocouples (Type: E) give the highest measurement sensitivity of 68 μV/°C, with an inaccuracy of ±0.5% and a useful measuring range of −200 °C up to 900 °C. Unfortunately, while they can operate satisfactorily in oxidizing environments when unprotected, their performance and life are seriously affected by reducing atmospheres.

Iron – constantan thermocouples (Type: J) have a sensitivity of 55 μV/°C and are the preferred type for general purpose
measurements in the temperature range of −40 °C to +750 °C, where the typical measurement inaccuracy is ±0.75%. Their performance is little affected by either oxidizing or reducing atmospheres.

Copper – constantan thermocouples (Type: T) have a measurement sensitivity of 43 μV/°C and find their main application in measuring
subzero temperatures down to −200 °C, with an inaccuracy of ±0.75%. They can also be used in both oxidizing and reducing atmospheres to measure temperatures up to 350 °C.

Seehao company gets specialized experiences, extensive knowhow, and advanced CNC equipments to machine a wide array of high nickel alloys, including constantan copper. Our custom design and manufacturing services means you receive a unique machining solution to your complex thermalcouples and connectors.

We can design and manufacture various machined constantan copper conductors, also known as machined constantan pin, for use in high quality thermocouples, feedthrough, and connectors. We can provide one–stop services for your wanted machined constantan components for your thermocouples and connectors assembly.

Whether your interconnect application is for prototype or mass production, we will be happy to provide our professional constantan copper machining service for you. We always use the high grade certified constantan copper alloy with strict quality control, this will ensure the quality of finished constantan copper terminal pins.

Product Name	Custom Machined Constantan Copper Contact Pins for Thermocouplers
Material	45% Ni, 55% Copper
Types	Negative conductor in Type K, Type J and Type T thermocouples
Standard	DIN, GB, ISO, JIS, BA, ANSI, ANS,
Grade	Annealed, 1/4 hard, half hard, 3/4 hard, hard
Tolerance	+/-0.01mm
Thread	UNC, UNF, UNEF, NPSC, NPT
Used	Thermocouplers, Connectors, Feedthrough, Power tubes, Microwave tubes, Transistors, Diodes, Hybrid packages, and scientific instruments

Constantan Copper Properties	Values
Electrical resistivity at room temperature	4.9×10−7 Ω·m
Temperature coefficient at 20 °C	8 ppmK−1
Temperature coefficient −55 to 105 °C	±40 ppmK−1
Curie point	35 K
Density	8.9 × 103 kg/m³
Melting point	1221–1300 °C
Specific heat capacity	0.39 kJ/(kg·K)
Thermal conductivity at 23 °C	19.5 W/(m.K)
Linear coefficient of thermal expansion at 25 to 105 °C	14.9×10−6 K−1
Tensile strength	455–860 MPa
Elongation at fracture	below 45%
Elastic modulus	162 GPa

FAQ

Q: Are you trading company or manufacturer?

A: We are a professional machining factory with our own exporting office in Shanghai

Q: How long is your delivery time for machined constantan copper thermocouplers contact pin?

A: Generally it is 30 days after your P/O issued to us, it is according to batch quantity.

Q: Do you provide samples of machined constantan copper thermocouplers contact pin? is it free or charged?

A: Yes, we could offer the machined constantan copper thermocouplers contact pins for free, but don't afford freight.

Q: What is your terms of payment for machined constantan copper thermocouplers contact pins?

A: Payment=1000USD, 30% T/T in advance ,balance before shipment.

If you have any question for machined constantan copper parts, please feel free to contact us as below:

Shanghai Fine-Boon Science & Technology Co., Ltd.

Room1301, No.889, Zhongjiang Road, Putuo District

China

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