0.230 mm Precision Alloys Invar Alloy Strip 8.2 g/cm3 Density 6.0mm ~ 250mm Width

0.2×30 mm Precision Alloys Invar Alloy Strip 8.2 g/cm3 Density 6.0mm ~ 250mm Width

Sealing glass elements of Vacuum switch tube

OhmAlloy-4J29 (Expansion alloy)
(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)

Kovar is a nickel–cobalt ferrous alloy compositionally identical to Fernico, designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5 × 10−6 /K between 30 and 200 °C, to ~10 × 10−6 /K at 800 °C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and microwave tubes and some lightbulbs.

The name Kovar is often used as a general term for Fe–Ni alloys with these particular thermal expansion properties. Note the related particular Fe–Ni alloy Invar which exhibits minimum thermal expansion.

OhmAlloy-4J29 also known as Kovar alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.

OhmAlloy-4J29was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.

Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.

Style of supply

Normal composition%

Ni	28.5~29.5	Fe	Bal.	Co	16.8~17.8	Si	≤0.3
Mo	≤0.2	Cu	≤0.2	Cr	≤0.2	Mn	≤0.5
C	≤0.03	More»Our other products 1K107 Transformer Co Ni79Mo4 Transformer Vacuum Furnace Nicke 0.230 mm Precision A Oxidized Surface Nic Bright Surface Fe Ni 0Cr23Al5 Wire High T 2.0mm Bright Surface Tips：This page [0.230 mm Precision Alloys Invar Alloy Strip 8.2 g/cm3 Density 6.0mm ~ 250mm Width] infomation provided by [Ohmalloy Material Co.,Ltd] ,the enterprise is responsible for the authenticity, accuracy and validity of the information content. Worldinout.COM do not assume any guarantee of joint and several liability. A safe way to suggest that the two sides trade, to ensure the interests of both sides. [ Sell search ]  [ Favorites ]  [ Tell friends ]  [ Print ]  [ Close ]   HomeSite | About us | Contact Us | Agreement | Copyright | Sitemap | Spread | Guestbook | RSS Feed © 2000-2034 Worldinout.COM All Rights Reserved| 豫B2-20030028-27 | Without www.worldinout.com written permission,Do not copy this site all information works and business information.