NiCr-NiSi thermocouple wire (Type K)

NiCr-NiSi (Type K) thermocouple finds the widest use in all basemetal thermocouple, at temperature above 500℃。The main chemical composition of positive leg NiCr (KP) are Ni≈90% and Cr≈10%; negative leg NiSi (KN) are Ni≈97% and Cr≈3%. The operating temperature range is - 200~1300℃(for short term) and 0~1100℃( for long term).

Category:

Thermocouple Wire

Key word:

Thermocouple Wire

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Product Details

Type K thermocouple has strong resistance to oxidation than other base metal thermocouples. It has high EMF against Platinum 67, excellent temperature accuracy, sensitivity and stability, with a low cost. It is recommended for oxidizing or inert atmospheres, but cannot be used directly in the following cases:

(1) Alternatively oxidizing and reducing atmosphere,

(2) Atmosphere with sulphur gases，

(3) Long time in vacuum，

(4) Low oxidizing atmosphere such as hydrogen and carbon monoxide atmosphere.

TYPE	Chemical Composition%
TYPE	Ni	Cr	Mn	Si	Al
KP	90	10	/	/	/
KN	97	/	/	3	/

Standard: IEC60584-1

TYPE	EMF Versus Pt.67(mV)
TYPE	100℃	200℃	400℃	600℃	800℃	1000℃
KP	2.826~2.886	5.949~6.007	12.729~12.821	19.532~19.676	26.064~26.246	32.313~32.525
KN	1.224~1.256	2.145~2.175	3.600~3.644	5.271~5.331	7.080~7.160	8.807~8.907
KP-KN	4.050~4.142	8.094~8.182	16.329~16.465	24.803~25.007	33.144~33.406	41.120~41.432

Physical Properties:

Type	Density at 20℃ （g/cm³）	Melting point （℃）	Tensile Strength(Soft annealed condition in 20℃)（Mpa）	Elongation(Soft annealed condition in 20℃)（%）	Resistivity at 20℃ (μΩ.m)
KP	8.6	1427	≥490	≥10	0.71
KN	8.6	1360	≥390	≥15	0.30