Ceramvar alloy, ASTM F1466,(Ni27Co25),Chinese 4J33/4J34
CERAMVAR ALLOY or we call iron-nickel-cobalt alloys, nominally 27% nickel, 25% cobalt and 48% iron, in the forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics, for vacuum electronic applications. Unless otherwise indicated.
Forms: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube

Description

CERAMVAR ALLOY or we call iron-nickel-cobalt alloys, nominally 27% nickel, 25% cobalt and 48% iron, in the forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics, for vacuum electronic applications. Unless otherwise indicated. When tested, the alloys shall comply to specified requirements for chemical composition, surface finish, temper, grain size, tensile strength, hardness, inclusion content, thermal expansion, transformation, and dimensions.

Application

Glass to metal ,vacuum electronic , metal-to-ceramic seals.

parameter

Cross Reference:

Russia	Japan
33HK(Ni33Co17)	-

Typical chemistry:

C	S	P	Si	Mn	Ni	Co	Fe
≤
0.05	0.020	0.020	0.30	0.50	32.1-33.6	14.0-15.2	Balance

Mechanical Properties:

Tensile Strength(for wire)

Symbol	State	Tensile Strength
R	Annealed	<585
1	Unannealed	>860

Tensile Strength(for strip)

Symbol	State	Tensile Strength
R	Annealed	<570
1	Unannealed	>700

Hardness of Deep stamping strips

state	Thickness	Hardness HV
Deep-stamping	>2.5	<170
	<2.5	<165

Average Coefficient of Linear Expansion

Heat Treatment of the Samples	Mean Coefficient of Linear Expansion
	20 to 4l00℃	20 to 500℃
Heat to 900±20℃ in the protective atmosphere or in vacuum condition, hold for 1 hour, cooled to 200℃ at a rate less than 5℃/h, and take out from the furnace.	6.0～6.8	6.6～7.4

Mean coefficient of linear at different temperature, ā/(10^-6/K)

Notes: under condition that the average coefficient liner expansion meets the requirements of standard, the content of nickel and cobalt are allowed to deviate from the stated range.

Size Range

Sheet	Thickness:0.10mm~3.50mm, width: ≤300mm
Plate	Thickness:3.5mm~40.0mm, width: ≤500mm
Round wire	Thickness:0.10mm~5.0mm
Flat Wire	Dia 0.5mm~Dia 5.0mm, length≤1000
Rod	Dia 5.0mm~Dia 8.0mm, length≤2000
	Dia 8.0mm~Dia 32.0mm, length≤2500
	Dia 32.0mm~Dia180.0mm, length≤1000
Capillary	OD 8.0mm~1.0mm,ID 0.1~8.0 length≤2500
Pipe	OD 120mm~8.0mm,ID 8.0~129 length≤4000

Condition: (With max tolerance) cold rolled, cold drawn, hot rolled , hot forging ,peeled turned ,bright ,bright annealed