Expansion alloy 4J80 is a nickel-based non-magnetic fixed expansion porcelain sealing alloy. Medium thermal expansion coefficient in the room temperature range of 600.
Expansion alloy 4J80 specification
Bar 5.0mm to 8.0mm cold drawn; 8.0mm to 30.0mm hot rolled; 30.0mm to 180.0mm hot forged
Plate 3.5mm to 30.0mm hot rolling; 30.0mm to 40.0mm hot forging
Strip 0.2mm to 3.5mm cold rolled
Flat wire 0.5mm to 5.0mm hot rolled
Round wire 0.1mm to 5.0mm cold drawn
Capillary tube outer diameter 8.0mm to 1.0mm , inner diameter 0.1mm to 8.0mm cold drawn
Tube outer diameter 120mm to 8.0mm, inner diameter 8.0mm to129mm cold drawn
Chemical composition of expanded alloy 4J80
Mechanical properties of expanded alloy 4J80
Magnetic permeability of expanded alloy 4J80 alloy sample after heat treatment
Used for non-magnetic sealing parts of special electronic instruments, mainly used for vacuum tight welding and edge welding of high alumina ceramic materials.
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