1. Brief introduction:

   4J32 alloy is also called Super-Invar alloy. In -60℃ to 80℃ temperature range the expansion coefficient is lower than that of 4J36, but the low temperature structure stability is not good as that of 4J36.

   It is primarily used for manufacture high precision instrument parts that require high-accuarcy dimensions within the range of ambient temperature variations.

    

2. Main specifications:
   

   Chinese grade	USA	Russia	France
   4J32	Super-Invar	32HКД,32HК-BИ	Invar,Superieur

    

3. Chemical composition under YB/T5241-2005 standard:

   Grade	chemical composition,%
   4J32	C	P	S	Si	Cu	Mn	Ni	Co	Fe
   	MAX
   	0.05	0.02	0.02	0.2	0.4~0.8	0.2~0.6	31.5~33	3.2~4.2	Remainder

   Remarks：If require adjustments for some chemical compositions, pls consult with us.

   
   

4. Typical average linear expansion coefficient value α,10-6/℃
   

   Grade	20℃~50℃	20℃~100℃	20℃~200℃	20℃~300℃	20℃~400℃	20℃~500℃
   4J32	0.7	0.8	1.4	4.3	7.2	9.3

    

5. Main product types:

   wire,rod, bar,strip, plate/sheet,tube,rectangular tube,square tube, ring,forging

   
   

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