1. Brief introduction:

   It’s Nickel-Iron controlled-expansion alloy with Ni42% nominal value.

   It has low and nominally constant coefficient of thermal expansion from room temperature to about 300℃.

   It is a sealing structural material widely used in the electric vacuum industry.Used for semiconductor lead frames in integrated circuits, bi-meatl thermostat strip, thermostat rods,for ceramic-to-metal seals with alumina ceramics and various glass-to-metal seals.

    

2. Main specifications:
   

   Chinese grade	UNS	UK	Werkstoff Nr.	Germany	Russia	France
   4J42	K94100	Nilo42	1.3917	Vacodil42,Nilo42	42H	N42

    

3. Chemical composition under YB/T5235-2005 standard:

   Grade	chemical composition,%
   4J42	C	P	S	Mn	Al	Si	Co	Ni	Fe
   	MAX
   	0.05	0.02	0.02	0.8	0.1	0.3	1	41~42.5	Remainder

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

   
   

4. Tensile strength under YB/T5235-2005 standard:
   

   delivery condition	Tensile strength of strip,N/mm2
   Soft	＜590
   Hard	＞700

    

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

   Grade	20℃~100℃	20℃~200℃	20℃~300℃	20℃~400℃	20℃~450℃	20℃~500℃	20℃~600℃
   4J42	5.6	4.9	4.8	5.9	6.9	7.8	9.2

    

6. Main product types:

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

   
   

For more product information, please click the top product menu navigation, or view the relevant product information in the right column.