Glass Sealed And Controlled Expansion Alloys

Precision Alloy 4J28The application of Precision Alloy 4J28:It is applied to seal the equipment of the electric component with the soft glass.Glass sealed and controlled expansion alloys *Alloy 27,Website: F-256,UNS K92801,(Fe-28Cr),Chinese 4J28Note:Glass Sealing "27" Alloy,it's glass-to-metal sealing and iron-chromium alloy.Nominally 28 % chromium, in strip, bar, wire, and rod forms intended primarily for sealing to glass in electronic applications.UNS K92801 should only be considered for use at service temperatures below 300 C. The alloy is prone to sigma phase formation at temperatures close to 620 C, and exhibits brittle mechanical behavior after prolonged exposures at temperatures close to 475 C.Grade and Chemical Composition (see Table 1) Table 1 Grade and Chemical CompositionGradeChemical Composition (%)CPSMnSiNiNCrFe&4J280.120.020.021.000.700.500.2027.0~29.0BalanceNotes:1,Under condition that the average coefficient of the linear expansion meets the requirements of the standard, the content of chromium is allowed to deviate from the stated range. 2,The shape and dimensions of the alloys are in compliance with GB/T14985.Physical Property (see Table2 & Table 3) Table 2 Coefficient of Linear ExpansionGradeHeat Treatment of the SamplesAverage Coefficient of Linear Expansion20~530 C4J28Heat to 1100 20 C, hold for 15min., cool to room tempreture in the air.10.8~11.4Note:The hardness of the annealed strip should be no more than 170. Hardness inspection is not required when the thickness of the strip is less than 0.2mm.Table 4 Coefficient of Linear ExpansionGradeAverage Coefficient of Linear Expansion  /(10-6/K)20~200 C20~300 C20~400 C20~450 C20~500 C20~600 C20~700 C20~800 C4J2810.010.510.8-11.111.211.611.6Specification:Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube Size Range:1.Sheet---Thickness 0.1mm~3.5mm, width:& 300mm,Condition: cold rolled, bright, bright annealed2.Plate---Thickness 3.5mm~40.0mm,width:& 300mm,Condition: cold rolled, hot rolled, annealed3.Round Wire---Dia 0.1mm~Dia 5.0mm,Condition: cold drawn, bright, bright annealed4.Flat Wire---Dia 0.5mm~Dia 5.0mm,length:& 1000mm,Condition:flat rolled, bright annealed5.Bar---Dia 5.0mm~Dia 8.0mm,length:& 2000mm,Condition:cold drawn,bright, bright annealed---Dia 8.0mm~Dia 32.0mm,length:& 2500mm,Condition:hot rolled,bright, bright annealed---Dia 32.0mm~Dia 180.0mm,length:& 1300mm,Condition:hot forging,peeled, turned, hot treated6.Capillary---OD 8.0mm~1.0mm,ID 0.1mm~8.0mm,length:& 2500mm,Condition: cold drawn, bright, bright annealed7.Pipe---OD 120mm~8.0mm,ID 8.0mm~129mm,length:& 4000mm,Condition: cold drawn, bright, bright annealed

Other supplier products

	Sintered NdFeB Magnet	Sintered NdFeB MagnetNeodymium Iron Boron  is the third generation of Rare Earth Magnet,Website:, it is the strongest magnets in the world at prese...
	Permendur 2V	Permendur 2V/Hiperco 50AHigh Saturation magnetic induction soft magnetic alloys 1J22(GB/TPermendur 2V is high saturation magnetic induction strengt...
	Magnetic Grid	Magnetic Grid1. Magnetic grid,Website:, also called magnetic grate, are designed for product pruity for free fowing materials such as carbon black,...
	High Temperature Ferrous Alloy	High Temperature Ferrous AlloyIron-Chromiun High temperature alloys*Alloy A286,Website: S66286,SAE AMS 5726,Chinese GH2132*Inconel 600,ASTM B564,UN...
	Glass Sealed And Controlled Expansion Alloys	Precision Alloy 4J28The application of Precision Alloy 4J28:It is applied to seal the equipment of the electric component with the soft glass.Glass...

All supplier products

Same products

	OCS-02 Crane Scale	Seller: ZHEJIANG HAOYU INDUSTRY & TRADE CO.,LTD	Hanging Scale 100 kg which is specially designed for Cranes or used by Hanging by making it compa...
	OCS-01 Wireless Crane Scale	Seller: ZHEJIANG HAOYU INDUSTRY & TRADE CO.,LTD	The wireless crane load cellshould be composed of the sensor, the scale frame, and the weighing d...
	Most Popular 208 Price Computing Scale	Seller: ZHEJIANG HAOYU INDUSTRY & TRADE CO.,LTD	HY208 have a large body. It is more stronger and stable for weighing objects. Flat platter and co...
	More Storage Keys Available 610BK Price Computing Scale	Seller: ZHEJIANG HAOYU INDUSTRY & TRADE CO.,LTD	Application of More Storage Keys Available 610bk Price Computing Scale 610 BK price calculatin...
	Mini Mirror Scale 2012B	Seller: ZHEJIANG HAOYU INDUSTRY & TRADE CO.,LTD	Small size, easy to store, smart features for smart users, Body weight measurement readings shoul...