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W. Nr. 1.3981 Round Bar Borosilicate Glasses and Alumina Type Ceramics Sealing
W. Nr. 1.3981, a nickel-iron-cobalt alloy containing
approximately 29% nickel and 17% cobalt. Its thermal expansion
characteristics match those of borosilicate glasses and
alumina type ceramics. It is manufactured to a close
chemistry range, yielding repeatable properties which make
it eminently suitable for glass-to-metal seals in mass
production applications, or where reliability is of paramount
importance.
The magnetic properties of Nilo alloy K are governed basically by
its composition and by the heat treatment applied.
The composition of the alloy generally decides the optimum
values of the magnetic properties, such as permeability, coercive
force and hysteresis loss. The heat treatment given to the
alloy will vary these properties between the worst and optimum
levels
Equal grades: ASTM F15, Nilo-K,UNS K94610 (FeNi29Co17), 4J29, 29HК
Nomonal chemical composition
Element | Ni | Fe | Co |
Weight(%) | 29 | 53 | 17 |
Key features
Applications
Glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves
Typical Thermal Expansion of NILO K
Size range
O.D: 0.20~8mm
Wall thickness: 0.05~1mm
Tolerance
Out diameter: ±0.003mm
Wall thickness: ±0.005mm
Length: ±0.05mm