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4J28 Expandable round bar
Quick Details
Steel Grade: 4J28
Place of Origin: Baoji, China (Mainland)
Model Number: 4J28
Technique: Hot Rolled
Alloy Or Not: Is Alloy
Special Use: Mold Steel
Type: Alloy Steel Bar
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Packaging & Delivery
Packaging Details:
factory packaging

Delivery Detail:
4weeks

Product Description
Specifications
Precision Alloy 4J28:
1.glass-to-metal sealing
2.iron-chromium alloy
3.nominally 28 % chromium

The 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,ASTM F-256,UNS K92801,(Fe-28Cr),Chinese 4J28


Note:  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

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

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