OEM Silver Round Expansion Alloy Precision Small CNC Parts Machining

Bars, plates, strips, wires, pipes

Surface treatment:
Hot rolled, Hot forging, Cold rolled, Cold pull, Cold drawn
Metallic color
Expansion alloy 4J28 Description

Expansion alloy 4J28 (Alloy 27) is a glass-sealed iron-chromium alloy that has a linear thermal expansion coefficient similar to that of soft glass within a certain range, and is corrosion resistant.

Expansion alloy 4J28 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 to 129Mm cold drawn

Chemical composition of expanded alloy 4J28

Chemical composition data sheet of expansion alloy 4J28

Expansion alloy 4J28 average linear expansion coefficient

Table of mean linear expansion coefficient data for expansion alloy 4J28

Coefficient of linear expansion of expansion alloy 4J28

Data sheet of linear expansion coefficient of expansion alloy 4J28

Application of expansion alloy 4J28
Suitable for sealing iron-chromium alloy with soft glass on electrical components


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