FeNiCo Ceramic Sealing Alloy

33НК

The fixed expansion porcelain is sealed with iron nickel cobalt alloy, which has a hot wire expansion coefficient similar to that of 95% Al2O3 ceramics in the range of – 60-500 ℃.

Equivalent Grades

GBГОСТASTMUNSDINW.Nr.NFBSJISSS
4J3333НКKV-4
4J34CeramvarVacon 20

Chemical Composition, %

AlloyCMnSiPSNiCoFe
4J33≤0.05≤0.5≤0.3≤0.02≤0.0232.1-33.614.0-15.2Rest
4J34≤0.05≤0.5≤0.3≤0.02≤0.0228.5-29.519.5-20.5Rest

Average Linear Expansion Coefficient

AlloyHeat treatment for sampleAverage linear expansion coefficient a/10-6.K-1
20~400℃20~500℃20~600℃
4J33Heating to temperature between 900℃±20℃ in a protective or vacuum atmosphere. Holding for 1hour, cooling to 200℃ at a rate less than 5℃ per min, then air cooling6.0~6.86.6~7.4
4J346.3~7.17.8~8.5

Available Products and Specifications

Rod, Bar, Wire and ForgingsYB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78
Plate, Sheet and StripYB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78
Pipe and TubeYB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78
Welding Product
OthersYB/T5234-93, ГОСТ 10994-1974, ГОСТ 14080-78

Features

FeNiCo Ceramic Sealing Alloys are usually applied for match sealing electronic apparatus in ceramic 95% Al2O3.

Applications

FeNiCo Ceramic Sealing Alloys are usually applied for match sealing electronic apparatus in ceramic 95% Al2O3.