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Low-expansion Alloy-4J32

Low-expansion Alloy

Grade：

32нкд, Super-Invar, Super-invariant Steel

Standards and Technical Conditions：

GBn110-81 YB/T 5241

Product Characteristics

4J32 alloy is also named as Super-Invar alloy. Within the atmospheric temperature variation range of -60 to +80℃, its expansion coefficient is lower than that of 4J36 but its low-temperature structural stability is inferior to that of 4J36 alloy.

Industrial Application

The alloy is mainly used for manufacturing the instrument parts that require the extremely high dimensional precision within the range of ambient temperature variations.

Common Delivery Condition

Standard Heat Treatment Procedure 

Excerpted from GBn110-81, YB/T 5241.

Main Specifications

 

Delivery Condition

Bars did not undergo the heat treatment, supplied after polishing and turning

Chemical Composition


Mechanical Properties


Tensile Properties


Industrial Application

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