Nicrobell is a nickel-chromium alloy with 1.4% silicon which provides high oxidation resistance and strength at temperatures up to 1250°C.
The similarity of chemical composition of Nicrobell sheath and type N conductors reduces the potential for the diffusion of elements between the alloys resulting in reduced change in EMF output. The lack of Manganese and Aluminium in Nicrobell and type N alloys also prevents cross-contamination of the thermocouple legs and subsequent thermocouple degradation over time. This ensures better stability of EMF output of thermocouples type N in Nicrobell compared to type K in 310 stainless steel sheath.
Nicrobell also has good resistance and exhibits freedom from microstructural degradation in nitrogen-based atmospheres due to the absence of such alloying elements as Niobium or Aluminium, that form internal nitrides. This reduces the risks of thermocouple failure due to the sheath embrittlement caused by nitridation.
NicroBell Material Chemical Composition(%)Nb | 0.38 |
Mg | 0.012 |
Si | 1.33 |
Cr | 24 |
Ni | 73 |
Mo | 0.17 |
Co | 0.28 |

Mineral Insulated Nicrobell Sheathed Cable Specifications
Size:0.5mm-12.7mm
Type N
Insulation material
MGO:99.5%
CAO:0.32%
A203:0.1%
Sheath: Nicrobell
Thermocouple Wire
Code | Wires component of the thermocouple | |
+Positive leg | -Negative leg | |
N | Ni-cr-si (NP) | Ni-si-magnesium (NN) |
K | Ni-Cr (KP) | Ni-Al(Si) (KN) |
E | Ni-Cr (EP) | Cu-Ni<constantan> (EN) |
J | Iron (JP) | Cu-Ni<constantan> (JN) |
T | Copper (TP) | Cu-Ni<constantan> (TN) |
B | Platinum rhodium-30% | Platinum rhodium-6% |
R | Platinum rhodium-13% | Platinum |
S | Platinum rhodium-10% | Platinum |
Mineral Insulated Metal sheathed Cable Structure
DLX alloy, which has been an alloy factory for more than 18 years, we were founded in 2002 and ran business with resistance alloy first. In the past years, we have R&D new products such as Thermocouple alloy, Bare wire, Mineral insulated cables, Extension cables, Thermocouple Head, and connectors.
Over the years, we have worked hard to promote and realize the modernization of alloy sales, and actively cultivated and enhanced the ability of employees' independent innovation. All-round renovation and upgrade of the original business site, facilities and equipment, and modern computer management. Hope to establish long-term partnerships and win a market reputation.
We are increasing the scale of trade and customers throughout the world. With our good reputation, we have won the trust of our customers. It helps the modernization of our country and promotes economic and technical exchanges with the rest of the world. We also look forward to enhancing our friendship with other countries and making a positive impact.
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Usually, sample lead time is 15 days after payment has been confirmed.