Project Description

Non Magnetic Constant Expansion Porcelain Sealed Nickel Base Alloy

80НМВ

Non magnetic fixed expansion porcelain sealed nickel base alloy has medium linear thermal expansion coefficient in the range of room temperature to 600 ℃. Non magnetic, corrosion resistant, with high strength and toughness. It mainly produces non-magnetic sealing parts of special electronic instruments, such as non-magnetic constant expansion ceramic sealing materials for vacuum sealing welding of high alumina ceramic materials and edge welding.

Equivalent Grades

GBГОСТASTMUNSDINW.Nr.NFBSJISSS
4J8080НМВ––––––––

Chemical Composition, %

AlloyCPSMnSiMoWCuNi
4J78≤0.05≤0.02≤0.02≤0.40≤0.3020.0-22.0–≤1.50Rest
4J80≤0.05≤0.02≤0.02≤0.40≤0.309.5-11.59.5-11.51.5-2.5Rest
4J82≤0.05≤0.02≤0.02≤0.40≤0.3017.5-19.5––Rest

Average Linear Expansion Coefficient

AlloyHeat treatment for sampleAverage linear expansion coefficient a/10-6.K-1Magnetic Permeability μ16000
μH/m
20~500℃20~600℃
4J78Heating to temperature between 1000-1050℃ in a protective or vacuum atmosphere. Holding for 30-40mins, cooling to 300℃ at a rate less than 5℃ per min, then air cooling12.1-12.712.4-13.0≤1.263
4J80Heating to temperature between 850-900℃ in a protective or vacuum atmosphere. Holding for 30-40mins, cooling to 300℃ at a rate less than 5℃ per min, then air cooling12.7-13.313.0-13.6≤1.263
4J82Heating to temperature between 1000-1050℃ in a protective or vacuum atmosphere. Holding for 30-40mins, cooling to 300℃ at a rate less than 5℃ per min, then air cooling12.5-13.113.0-13.6≤1.263

Available Products and Specifications

Rod, Bar, Wire and ForgingsYB/T5233
Plate, Sheet and StripYB/T5233
Pipe and TubeYB/T5233
Welding Product–
OthersYB/T5233

Features

Non magnetic, corrosion resistant, with high strength and toughness.

Applications

It mainly produces non-magnetic sealing parts of special electronic instruments, such as non-magnetic constant expansion ceramic sealing materials for vacuum sealing welding of high alumina ceramic materials and edge welding.