Type N Thermocouple Wire

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This type of thermocouple wire is used for manufacturing N-type thermocouples, which are temperature sensors designed to measure high temperatures. It consists of two different metal alloy wires that provide excellent stability and strong oxidation resistance, making it well-suited for high-temperature and oxidizing environments.

The N-type thermocouple is composed of:

NP (positive leg): Made from a nickel-chromium-silicon (Ni-Cr-Si) alloy, offering strong resistance to oxidation.
NN (negative leg): Made from a nickel-silicon-magnesium (Ni-Si-Mg) alloy, ensuring stable performance over extended use.

Chemical composition (%)

Material	Chemical composition (%)
Material	Ni	Cr	Si	Mg	Al
NP(NiCrSi)	bal	13.7-14.7	1.2-1.6	< 0.01
NN(NiCrMg)	bal	< 0.02	4.2-4.6	0.5~1.5

Physical and mechanical properties

Material	Density (g/cm3)	Melting point℃	Tensile strength (Mpa)	Volume resistivity (μΩNaN)	Elongation rate (%)
NP (NiCrSi)	8.5	1410	>620	100.0 (20℃)	>30
NN (NiCrMg)	8.6	1340	>550	33.0(20℃)	>35

EMF value range at different temperatures

Material	EMF value Vs Pt(μV)
Material	100℃	200℃	300℃	400℃	500℃	600℃
NP (NiCrSi)	1755~ 1813	3910~ 3976	6313~ 6383	8880~ 8959	11552~ 11654	14307~ 14433
NN (NiCrMg)	975~ 1005	1954~ 1986	2975~ 3011	4035~ 4075	5120~ 5170	6212~ 6274

EMF value Vs Pt(μV)
700℃	800℃	900℃	1000℃	1100℃
17129~17275	20010~20178	22951~23139	25943~26149	28972~29194
7288~7362	8318~8402	9281~9373	10159~10261	10948~11060