Introduction

4J36 is a special low-expansion iron-nickel alloy with ultra-low expansion coefficient. Among them, the control of carbon and manganese components is very important. Cold deformation can reduce the thermal expansion coefficient, and heat treatment within a specific temperature range can stabilize the thermal expansion coefficient.4J36 iron-nickel alloy is corrosion resistant in dry air at room temperature. In other harsh environments, such as humid air, corrosion (rust) may occur.

Chemical components(%)

Mechanical properties

Physical properties

Advantages

(1)Very low thermal expansion coefficient between -250℃ and +200℃

(2)Good plasticity and toughness

Applications

4J36 iron-nickel alloy is used in environments that require extremely low expansion coefficients.

Typical applications are as follows:

(1)Production, storage and transportation of liquefied gas

(2)Measurement and control instruments with working temperatures below +200°C, such as temperature regulating devices

(3)Screw connector bushings between metals and other materials

(4)Bimetal and temperature-controlled bimetal

(5)Membrane frame

(6)Shadow mask

(7)CRP parts tempering mold for aviation industry

(8)Electronic control unit framework for satellites and missiles below -200°C

(9)Auxiliary electron tube in the electromagnetic lens of the laser control device

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