Alumel - 2.4122 - Nisil® wire
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|НМцАК2-2-1||2.4122||NiMn3Al||Delivery from the stock, in stock|
I have the simplest tastes, such as Oscar Wilde complained, I satisfied with the best.
This thermocouple alloy, most of which is nickel up to 96%. The alloy also contains 1% Co — to maintain the required thermal emf. Aluminum alloy is not more than 2.5%, manganese is also present (Mn) — to 2.2%, and silicon (Si) — 1.2%. Perhaps alloying zirconium (0,06% Zr), and boron (0,03% B) — is one of the new alloys.
Alloy Density 8.48 g / cm³, t ° Melting 1440 ° C, the resistivity — 0.32 ohm mm2 / m, the temperature coefficient of linear expansion — 13.7 • 10−6 / ° C, t = annealing ° 900- 950 ° C. Physical properties alumel determines nickel, which is the basis of alloy. Among the main advantages of — high-temperature strength, resistance to aggressive media. Strengthen the quality of the alloying elements. The doping increases the ductility at t ° to 600 ° C — 1100 ° C, provides a long-term strength of 700 ° C to 900 ° C, allows you to use alumel (with a stable indicator of thermoelectric power) up to 1300 ° C.
Alumel wire produced on the basis of nickel, is quite expensive, as an expensive nickel metal. Its main drawback — exposure to the corrosive effects of sulfur at higher temperatures, resulting in corrosion and embrittlement. You can fix the percentage of the increase in the composition of silicon and to reduce the proportion of aluminum. This change increases the life of the thermocouple at a temperature of over 1000 ° C.
Alumel pyrometry is widely used as a band or wire Ø 0.2 — 3.2 mm for the production of thermostats, thermocouple compensating cables. Thermocouple form 2 dissimilar conductors welded ends and capable of generating thermal emf with increasing temperature. One of the electrodes is positive, the second — negative. Alumel is used in thermocouple Chromel-alumel as the negative electrode for measuring the t ° to 1000 ° C. Due to doping, such thermocouple can withstand short-term effect and higher temperatures up to 1300 ° C, even when operating in hostile environments. Compensatory alumel wire of serve to connect the thermocouple to the inverters directly to the measuring instruments themselves to reduce reading errors. Thanks to small dimensions and high precision, chromel-aluminum sensors are widely used in aerospace engineering, automotive and other areas of modern industry.
Alumel NMTsAk 2−2-1 comes in the following forms:
- The wire (Ø 0,10 — 12,00 mm);
- Circle (Ø 12,0 mm — 100.0 mm);
- The tape (thickness of 0.1−5.0 mm, the width of 3−600 mm).
|Ni + Co||Fe||C||Si||Mn||Co||Al||impurities|
|91.5 — 95.15||≤ 0.3||≤ 0.1||0.85 — 1.5||1.8 — 2.7||0.6 — 1.2||1.6 — 2.4||only 0.7|
The physical properties of the alloy alumel NMtsAK2−2-1 at 20 ° C
|Hardness, soft alloy||Hardness, hard alloy||Melting point, ° C:||hot working temperature, ° C:||Annealing Temperature, ° C:|
|HB 10 -1 = 130 MPa||HB 10 -1 = 250 — 300 MPa||1440||1250 — 1000||900 — 950|
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In stock «Elektrovek-steel» company offers a wide range of thermocouples. Our offices are located in Russia and Ukraine. Making a purchase is possible, without leaving the office, through the Company’s website. To purchase just need to place your order and click «buy». If necessary, on any current problems you can consult our managers. They will provide all the necessary information regarding the products, price range, the implementation conditions. Lead times are minimal. When wholesale purchases discounts.