• Suzhou Xunshi New Material Co., Ltd
    Daniel Weree
    Have been business relationship for 3 years, great partner for Nickel Cobalt Alloy!
  • Suzhou Xunshi New Material Co., Ltd
    Carolina Fasio
    On-time delivery. And support is good and fast.
Contact Person : Allen Sun
Phone Number : +86 18112628895
WhatsApp : +8618112628895

NILO K Thermal Expansion Nickel , UNS K94610 W. Nr. 1.3981 Cobalt Iron Alloy

Place of Origin China
Brand Name XUNSHI
Certification ISO9001:2015
Model Number Nilo K
Minimum Order Quantity 20kg
Price Negotiable
Packaging Details Plywood crate
Delivery Time 45-50 days
Payment Terms T/T
Supply Ability 500kg per month

Contact me for free samples and coupons.

WhatsApp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

Product Details
Tolerence ±0.003mm Outer Diameter 0.2-8mm
Wall Thickness 0.015-0.5mm Equal Grades ASTM F15, UNS K94610 (FeNi29Co17), 4J29, 29HК
Forms Of Supply Round Bar, Forging, Wire, Strip, Tube, Pipe, Capillary Density 8.16g/cm3
High Light

thermal expansion nickel


corrosion resistant alloys

Leave a Message
Product Description

NILO K Controlled Expansion Alloy UNS K94610 W. Nr. 1.3981 Round Bar in Stock



NILO alloy K (UNS K94610/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


Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials
This alloy has found wide application in power tubes, microwave tubes, transistors and diodes. Integrated circuits, it has been used for the flat pack and the dual-in-line package


Typical Thermal Expansion of NILO K

NILO K Thermal Expansion Nickel , UNS K94610 W. Nr. 1.3981 Cobalt Iron Alloy 0
Size range 
O.D: 0.20~8mm
Wall thickness: 0.05~1mm

Out diameter: ±0.003mm
Wall thickness: ±0.005mm
Length: ±0.05mm