Datasheet

Kanthal Appliance Alloys Handbook 15
3
3. Stranded Resistance Heating Wire
Recognising the need for more preciesly
controlled stranded wire within the cable
industry and working closely with our
cable customers, Kanthal have developed
a range of stranded resistance wires in
the well known NIKROTHAL,
KANTHAL and Nickel alloys.
These alloys possess the optimum
properties for high performance at
elevated temperatures and in other
adverse conditions where reliability and
quality is of paramount consideration.
True Concentric
Successive layers have different lay directions
and lay length.
Alloy Nominal composition, % Resistivity at 20°C Max. temp *)
Ni Cr Fe Al Oth. Ω mm
2
m
-1
°C
NIKROTHAL 80 80 20 1.09 1200
NIKROTHAL 60 60 16 Bal. 1.11 1150
KANTHAL D 22 Bal. 4.8 1.35 1300
KANTHAL AF 22 Bal. 5.3 1.39 1300
NICKEL 99.2 0.09
Ni Mn2% 98 2 Mn 0.11
•) Values given apply for sizes approx. 1.0 mm
Strand diameter
Nominal diameter to be determined from
single-end wire diameters, which have to
meet resistance requirements.
Resistance generally takes priority over
diameter. The calculation is:
Strand normal diameter = single-end
diameter x F
F=3 for 7-strand
F=5 for 19-strand true concentric
F=7 for 37-strand true concentric
Size range
Up to 37 wires (ends) of diameter
between 0.20-0.85 mm.