Glass sealed
and controlled expansion alloys
*Alloy 27 , ASTM
F-256 ,UNS K92801,(Fe-28Cr)，Chinese 4J28
Grade and Chemical
Composition (see Table 1)
Table 1 Grade and Chemical
Composition
|
Grade
|
Chemical
Composition (%)
|
|
C
|
P
|
S
|
Mn
|
Si
|
Ni
|
N
|
Cr
|
Fe
|
|
≤
|
|
4J28
|
0.12
|
0.02
|
0.02
|
1.00
|
0.70
|
0.50
|
0.20
|
27.0～29.0
|
Bal
|
Notes:
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 Expansion
|
Grade
|
Heat Treatment of the Samples
|
Average
Coefficient of Linear Expansion
|
|
20～530°C
|
|
4J28
|
Heat to 1100±20°C, hold for 15min., cool to room temperature in the
air.
|
10.8～11.4
|
NOTE: 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 than0.2mm.
Table 4 Coefficient
of Linear Expansion
|
Grade
|
Average
Coefficient of Linear Expansion ā/(10-6/K)
|
|
20～200℃
|
20～300℃
|
20～400℃
|
20～450℃
|
20～500℃
|
20～600℃
|
20～700℃
|
20～800℃
|
|
4J28
|
10.0
|
10.5
|
10.8
|
-
|
11.1
|
11.2
|
11.6
|
11.6
|
Usage: It is applied to seal the equipment of
the electric component with the soft glass.
Specification:
Sheet/Plate, Bar/Rod/Wire/Coil
Size Range:
*Sheet---thickness 0.1mm~3.5mm, width:≤300mm,Condition: cold rolled, bright,
bright annealed
*Plate---thickness 3.5mm~40.0mm,width:≤300mm,Condition: cold rolled, hot
rolled, annealed
*Round Wire---Dia 0.1mm~Dia 5.0mm,Condition: cold drawn, bright, bright
annealed
*Flat Wire---Dia 0.5mm~Dia 5.0mm,length:≤1000mm,Condition:flat rolled, bright
annealed
*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 treated
Note: we could do any other
products with specified technical standard, say,
ASTM,SAE,DIN,S.E.W.,JIS,ISO,IEC,NF,BS,ΓОСТ.PLS contact us for more information:
Tel: +86-29-89396652 or e-mail us at: Sales@xaleipeng.com
