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Alloy 27_ASTM F-256_UNS K92801_4J28 glass sealed and controlled expansion alloy
Alloy 27_ASTM F-256_UNS K92801_4J28 glass sealed and controlled expansion alloy
Specifications
Place of Origin :
Suzhou, China
Brand Name :
AIWEN
Certification :
ISO
Model Number :
UNS K92801
MOQ :
50kg
Price :
Available per request
Packaging Details :
Carton, wooden case
Delivery Time :
35 days
Payment Terms :
T/T
Supply Ability :
10000 kg per month
Description

Alloy 27 ASTM F-256 UNS K92801, 4J28 glass sealed and controlled expansion alloy


Note:
Glass Sealing UNS K92801 is a glass-to-metal sealing and iron-chromium alloy. Nominally with 28% of Chromium, in forms of strip, bar, wire and rod. It is used 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 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

Balance

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 tempreture 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 than 0.2mm.

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

Product tags

annealing stainless steel 316

,

samsuung s8 tempered glass

,

a357 aluminium alloy
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Alloy 27_ASTM F-256_UNS K92801_4J28 glass sealed and controlled expansion alloy

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Product Detail
Place of Origin :
Suzhou, China
Brand Name :
AIWEN
Certification :
ISO
Model Number :
UNS K92801
MOQ :
50kg
Price :
Available per request
Contact Supplier
Alloy 27_ASTM F-256_UNS K92801_4J28 glass sealed and controlled expansion alloy

Suzhou Xunshi New Material Co., Ltd

Site Member
9 Years
jiangsu, suzhou
Since 2005
Business Type :
Manufacturer, Exporter, Trading Company
Main Products :
Anti-corrosion alloy product, High temperature alloy product, Precision alloy product
Total Annual :
5000000-10000000
Employee Number :
50~100
Certification Level :
Site Member
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