Features and Application Notes
ISA
®
MINUS is used as negative leg for compensating lead KCA
as well as positive leg for compensating lead type W5Re/W26Re.
ISA
®
MINUS is standardized in the temperature range between
0 and +150 °C. Isabellenhütte supplies ISA
®
MINUS in standardized
tolerances up to +200 °C.
Form of Delivery
ISA
®
MINUS is supplied in the form of wires with dimensions
from 0.05 to 8.00 mm Ø in bare condition. Enamelled wires are
available in dimensions between 0.05 and 1.50 mm Ø. ISA
®
MINUS
can also be supplied in form of stranded wire, ribbon, flat wire
and rods. Please contact us for the range of dimensions.
Notes on Treatment //
ISA
®
MINUS is easy to process. The alloy
can be soldered and brazed without difficulty. All known welding
methods are applicable.
1/1 Data sheets // ISA
®
MINUS // 7
Brand
Name
ISA
®
MINUS
1)
Material
Code
Abbreviation
KNCA
Chemical Composition (mass components) in %.
Average values of alloy components
Cu
Balance
Ni
45
Mn
2
Fe
2
Physical Characteristics (Reference Values)
Density at +20 °C
Melting point
Specific heat
at +20 °C
Thermal conducti-
vity at +20 °C
Average linear thermal expansion coefficient
between +20 °C and +100 °C
Magnetic at room
temperature
g/cm³ °C J/g K W/m K 10
-6
/K
8.90 approx. +1,280 0.410 23.00 13.50 no
Mechanical Properties at +20 °C in Annealed Condition
3)
Tensile strength
MPa
Elongation
%
Hardness
HV10
hard > 840 < 2 > 240
soft 500 30 120
1) ISA
®
MINUS is a registered trademark of Isabellenhütte Heusler GmbH & Co. KG.
2) Reference at 0 °C.
3) The mechanical values considerably depend on dimension. The indicated values refer to a dimension of 1.0 mm diameter.
Thermoelectrical and Electrical Values in Soft-Annealed Condition
EMF
versus Cu/NIST 175
at +100 °C / mV
2)
EMF
versus Pt67/NIST 175
at +100 °C / mV
2)
EMF
versus Cu
at +200 °C / mV
2)
EMF
versus Pt67/NIST 175
at +200 °C / mV
2)
Electrical resistivity in
μΩ x cm
at +20 °C
-3.000 -2.230 -6.495 -4.659 51
Issue 29-March-2014