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Alumel Alloy

Alumel Alloy

Alumel(KN)is an alloy consisting of approximately 95% nickel, 2% manganese, 2% aluminium and 1% silicon. This magnetic alloy is used for thermocouples and thermocouple extension wire. In thermocouples

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Alumel(KN)is an alloy consisting of approximately 95% nickel, 2% manganese, 2% aluminium and 1% silicon. This magnetic alloy is used for thermocouples and thermocouple extension wire. In thermocouples, alumel is often used together with chromel to form type K thermocouples

(Common Name: KN, NiAl, NiSi3,Thermothal N)

Normal composition%

Nickel

95

Manganese

2

Aluminium

2

Silicon

1


Or

Nickel

97

Manganese

0

Chromium

3

Silicon

0

Properties of Alumel:

CHARACTERISTICS:


Temperature coefficient

0.00032 K−1

Electrical resistivity

0.294 µΩ m

Mechanical properties


Elongation at break

<44%

Thermal conductivity

30 W/m/K

Tensile strength

620–780 MPa

Style of supply

Alloys Name

Type

Dimension

Chromel-W

Wire

D=0.05mm~12mm

Chromel-R

Ribbon

W=0.5-10m

T=0.05~1.5mm

Chromel-S

Strip

W=10~150mm

T=0.1~3.0

Chromel-B

Bar

Dia=5-12mm

L=50~1500

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