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
GB | ГОСТ | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
4J80 | 80НМВ | – | – | – | – | – | – | – | – |
Chemical Composition, %
Alloy | C | P | S | Mn | Si | Mo | W | Cu | Ni |
4J78 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.40 | ≤0.30 | 20.0-22.0 | – | ≤1.50 | Rest |
4J80 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.40 | ≤0.30 | 9.5-11.5 | 9.5-11.5 | 1.5-2.5 | Rest |
4J82 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.40 | ≤0.30 | 17.5-19.5 | – | – | Rest |
Average Linear Expansion Coefficient
Alloy | Heat treatment for sample | Average linear expansion coefficient a/10-6.K-1 | Magnetic Permeability μ16000 μH/m | |
20~500℃ | 20~600℃ | |||
4J78 | Heating 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 cooling | 12.1-12.7 | 12.4-13.0 | ≤1.263 |
4J80 | Heating 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 cooling | 12.7-13.3 | 13.0-13.6 | ≤1.263 |
4J82 | Heating 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 cooling | 12.5-13.1 | 13.0-13.6 | ≤1.263 |
Available Products and Specifications
Rod, Bar, Wire and Forgings | YB/T5233 |
Plate, Sheet and Strip | YB/T5233 |
Pipe and Tube | YB/T5233 |
Welding Product | – |
Others | YB/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.