Nilo® K Kovar® K 1.3981 Alloy K tube N08825 round tube 6x1-26х2mm
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Nilo® K Kovar® K 1.3981 Alloy K tube N08825 round tube 6x1-26х2mm

  • Do you need a different steel quality or dimensions? Please write to us. Our sales team makes an offer from stock program or delivery program :)

  • diameter from 6x1 to 26х2mm; Length: from 0.25 meters to 2 meters.
  • Areas of application: metal-glass bushings; Microelectronics and microsystems technology (housing material); X-ray tubes; electronics (transistors and diodes); various hermetic seals; chemistry (vacuum systems);
  • If your desired length/width is not listed, select the next larger length/width. Leave a comment on your order with the length/width you want. We cut according to your measurements.
  • Didn't find the sizes you wanted? Just contact us! We are happy to help you with your request.

£1,876.80 Tax included

£1,876.80 Tax excluded

notifications_active Last items in stock

Length tolerance +/-2mm

  • Production time - 2-3 weeks.
  • Preparation for shipment - 2-3 working days.
  • Delivery time - depending on the parcel service. Look at the FAQ please.

Kovar® is a nickel alloy composed of approx. 54% iron, 29% nickel and 17% cobalt. The material is characterized by a low coefficient of thermal expansion of approx. 5 ppm/K and excellent toughness. The material has good physical and mechanical properties and can be processed by deep drawing and stamping. It is not resistant to corrosion in damp and wet environments and must be coated with an additional corrosion-resistant protective layer. 1.3981 has a tensile strength of 530 N/mm² and cannot be magnetised. The grade is easily solderable with solder.

Nilo® K tubes are available in the Evek GmbH online shop. We are a reliable Nickel Base Alloy supplier and ship worldwide.

Because Kovar® enables a bond between glass and metal, it is mainly used for metal-to-glass feedthroughs. The material is also used as a housing material in the field of microelectronics and microsystems technology. Other fields of application of 1.3981 are

  • X-ray tubes;
  • electronics (transistors and diodes);
  • various hermetic seals;
  • Chemistry (vacuum systems).

The following features characterize Kovar®

  • extremely low coefficient of thermal expansion;
  • excellent toughness;
  • good physical and mechanical properties;
  • can be deep drawn and stamped;
  • not corrosion resistant;
  • easily solderable with solder;
  • not magnetizable.

Evek GmbH online shop offers 1,3912 tubes. Purchase the nickel alloys and more from Evek GmbH.

Evek GmbH
Nilo® K Kovar K Rohr 1.3981
Round tube
Nickel alloy
operation area
Metal-to-glass bushings; Microelectronics and microsystem technology (housing material); X-ray tubes; Electronics (transistors and diodes); various hermetic seals; Chemistry (vacuum systems)
Material number
8.3 g / cm³
Melting point
1450 ° C
Thermal conductivity
17.3 W / (m K)
Electrical resistance
0.49 Ω mm² / m
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