4J34

• 

• Material:	4J34
  Other Brands:	4J34, 31HК, Ni31Co20, Vacon20, Ni28Co20
  Source Stock:	Customized
  Supplier:	Shanghai Hite Special Alloy Co., Ltd.
  Contacts:	Mr.KayDuan
  Email:	sales02@hitealloy.com

• 4J34 Details

  
  
  

  4J34 is a nickel iron alloy, also known as Invar 36 alloy. It has an extremely low coefficient of thermal expansion and can maintain almost constant dimensional stability in environments with significant temperature changes. It is an important material in high-precision instruments, optical devices, antennas, satellites, and other fields.

  
  

  Overview of 4J34 Precision Alloy:

  4J34 is a ceramic sealing alloy developed based on the characteristics of ceramics in China. The alloy has a linear expansion coefficient similar to that of 95% Al2O3 ceramics in the temperature range of -60 ℃ to 600 ℃. Mainly used for matching and sealing with ceramics, it is an important sealing structural material in the electric vacuum industry.

  
  

  4J34 chemical composition under YB/T5231-2005 standard:

  Grade 4J34	chemical composition,%
  	C	P	S	Mn	Si
  	≤0.05	≤0.02	≤0.02	≤0.5	≤0.3
  Cu	Cr	Mo	Ni	Co	Fe
  -	-	-	28.5~29.5	19.5~20.5	Remainder

  
  

  4J34 tensile strength under YB/T5231-2005 standard:

  delivery condition	Tensile strength of strip, N/mm2	Tensile strength of wire, N/mm2
  Soft	＜570	＜585
  Hard	＞700	＞860

  
  

  4J34 typical average linear expansion coefficient value α,10-6/℃:

  Grade	20℃~100℃	20℃~200℃	20℃~300℃	20℃~400℃
  4J34	-	7.5	6.9	6.6
  20℃~450℃	20℃~500℃	20℃~600℃	20℃~700℃	20℃~800℃
  -	6.9	8.3	-	-

  
  

  4J34 variety specifications and supply status:

  1. Specifications: Seamless pipes, steel plates, round steels, forgings, flanges, rings, welded pipes, steel strips, wire materials, and supporting welding materials.

  2. Delivery status: seamless tube: solid solution+acid white, length can be fixed; Plate: solid solution, acid washing, edge cutting; Welded pipes: solid solution acid white+RT% flaw detection, forgings: annealing+polishing; The bar is in a forged and rolled state, with a surface polished or turned smooth; The strip is delivered after cold rolling, solid solution in a soft state, and descaling; The silk material is delivered in the form of a solid solution acid washed plate or straight strip, and the solid solution straight strip is finely polished.