
NPX NNX Type N connector strip stamping strip Temperature Measurement
TYPE N (NiCrSi Vs.NiCrMg) is used in oxidizing, inert or dry reducing atmospheres. Exposure
to vacuum limited to short time periods. Must be protected from
sulfurous and marginally oxidizing atmospheres. Reliable and
accurate at high temperatures.
1. Chemical Composition
Material | Chemical composition (%) | ||||
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 |
2. Physical properties and Mechnical properties
Material | Density(g/cm3) | Melting point℃) | Tensile Strength(Mpa) | Volume resistivity(μΩ.cm) | Elongation rate (%) |
NP(NiCrSi) | 8.5 | 1410 | >620 | 100.0 (20℃) | >30 |
NN(NiCrMg) | 8.6 | 1340 | >550 | 33.0(20℃) | >35 |
3. EMF Value range at different temperature
Material | EMF value Vs Pt(μV) | |||||
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 |
Thermocouple Extension Cable-Know How
The Compensation Wire Nominal Chemical Composition
Alloy Name | Code | Nominal Chemical Composition(%) | |||||
Cu | Ni | Cr | Si | Fe | Mg | ||
Copper | SPC | 100 | - | - | - | - | - |
RPC | |||||||
KPC | |||||||
TPC | |||||||
CuNi0.6 | SNC | 99.4 | 0.6 | - | - | - | - |
RNC | |||||||
NiCr10 | KPX | - | 90 | 10 | - | - | - |
EPX | |||||||
NiCr14Si | NPX | - | 84 | 14.5 | 1.5 | - | - |
NiSi3 | KNX | - | 97 | - | 3 | - | - |
NiSi4Mg | NNX | - | 94.5 | - | 4.5 | - | 1.0 |
CuNi40 | KNCB | 60 | 40 | - | - | - | - |
CuNi22 | KNCA | 78 | 22 | - | - | - | - |
CuNi18 | NNC | 82 | 18 | - | - | - | - |
CuNi45 | ENX | 55 | 45 | - | - | - | - |
JNX | |||||||
TNX | |||||||
Iron | NPC | 100 | |||||
JPX | |||||||
KPCA |
The Compensation Wire EMF Value Reference
Extension Cable Code | Alloy Wire Name | Temperature Range(℃) | Application Classification | Tolerence(μV) | Thermocouple Measurement Terminal Temperature(℃) | |
Precision Grade | Normal Grade | |||||
SC or RC | Cu-CuNi0.6 | 0-100 | G | ±30(±2.5℃) | ±60(±5.0℃) | 1000 |
0-200 | H | - | ±60(±5.0℃) | |||
KCA | Fe-CuNi22 | 0-100 | G | ±44(±1.1℃) | ±88(±2.2℃) | 900 |
0-200 | H | |||||
KCB | Cu-CuNi40 | 0-100 | G | |||
KX | NiCr10-NiSi3 | -25-100 | G | |||
-25-200 | H | |||||
NC | Fe-CuNi218 | 0-100 | G | ±43(±1.1℃) | ±86(±2.2℃) | 900 |
0-200 | H | |||||
NX | NiCr14Si-NiSi4Mg | -25-100 | G | |||
-25-200 | H | |||||
EX | NiCr10-CuNi45 | -25-100 | G | ±81(±1.0℃) | ±138(±1.7℃) | 500 |
-25-200 | H | |||||
JX | Fe-CuNi45 | -25-100 | G | ±62(±1.5℃) | ±123(±2.5℃) | 500 |
-25-200 | H | |||||
TX | Cu-CuNi45 | -25-100 | G | ±30(±0.5℃) | ±60(±1.0℃) | 300 |
-25-200 | H | ±48(±0.8℃) | ±90(±1.5℃) |
Ohmalloy Material Co.,Ltd
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy.
Ohmalloy Material Co.,Ltd have a full production line from melting, surface cleaning, rolling and slitting, full set of testing machine and can meet all kinds of technical requirement from customer. Our product is widely used in heating equipment, big steel mill, mineral, electrical equipment, food machinery, auto industry, aerospace industry. Our product not only is popular in domestic market, but also been exported to all over the world.
Our company aims to be the best-quality alloy producer in the
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