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Brand Name : KAIXIN
Model Number : KX-Alloy33
Certification : ISO9001:2015
Place of Origin : China
MOQ : 200KG
Price : To negotiate
Payment Terms : T/T, L/C
Supply Ability : 50~80TONS per MONTH
Delivery Time : 45~60days
Packaging Details : Wooden Box, size as per guests's request
Shape : Wire,Strip,Rod,Tube,Plate
Alloy Type : Fe-Ni-Co Ceramic Sealing Alloy
Raw Materials : NI32.1-33.6%,CO14.0-15.2,Fe Rem
Executive standard : YB/T5234
Delivery State : Sosoloid
Application : It is an important sealing structure material in electric vacuum industry
Features : The product has an expansion coefficient matching sealing similar to 95% Al2O3 in the temperature range of -60℃~600℃
Size : Negotiable
Product Description and Application
4J33 is also known as Alloy 33
4J33 is constant expansion ceramic teal alloy, which is a ceramic sealing alloy developed on the basis of our ceramic characteristics. The linear expansion coefficient of the alloy is similar to that of 95%Al2O3 ceramics in the temperature range of -60℃ ~ 600℃. It is mainly used for matching sealing with ceramics,which is an important sealing structural material in electric vacuum industry.
Process Performance and Requirements
Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)
| Alloy Grade | Chemical Composition % | |||||||
| C | P | S | Mn | Si | Ni | Co | Fe | |
| Not more than | ||||||||
| 4J33 | 0.03 | 0.02 | 0.02 | 0.5 | 0.3 | 32.1~ | 14.0~ | Rem | 
| Alloy Grade | Sample Heat Treatment Institution | Average Coefficient of Linear Expansion α/(10-6/K) | |||
| 20~300 ℃ | 20~400 ℃ | 20~500 ℃ | 20~ 600 ℃ | ||
| 4J33 | It is heated to 900±20 ℃ in a protective atmosphere or vacuum, hold for 1 hour, then cool to 200 ℃ or less at a speed of no more than 5 ℃ / min | ----- | 6.0~6.8 | 6.6~7.4 | ----- | 
| Alloy Grade | Average Linear Expansion Coefficient over Different Temperature Ranges α/(10-6/ k) | ||||
| 20~200 ℃ | 20~300 ℃ | 20~400 ℃ | 20~500 ℃ | 20~600 ℃ | |
| 4J33 | 7.1 | 6.5 | 6.3 | 7.1 | 8.5 | 
Wire Tensile Strength
| State Code | State | Tensile Strength/MPa | 
| R | Soft State | <585 | 
| 1 | Hard State | >860 | 
| State Code | State | Tensile Strength/MPa | 
| R | Soft State | <570 | 
| l | Hard State | >700 | 

Professional Customization
| Cold-drawn Wire | ¢0.3~¢18mm(Delivery in rolls or trays) | 
| Hot-Rolling Wire | ¢5.5~¢20mm(Delivery in rolls) | 
| Strip | thickness 0.1~4.5*width 6~350mm(Supply in rolls or straight strips) | 
| Smooth Forged Rod on a Lathe | ¢60~350mm,L800-2500mm | 
| Hot-rolled Burnishing | ¢20~80mm,L1000-5000mm | 
| Cold Drawn and Burnishing | ¢2.5~18mm,L1000-8000mm | 
| Seamless Tube | ¢1~275mm,wall thickness 0.2~30,L1000-8000mm | 





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