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BYP30 (4J45) Controlled-Expansion Alloy
Overview of BYP30 (4J45) Controlled-Expansion Alloy
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BYP30 (4J45) has a certain linear expansion coefficient in a range of temperature. Similar alloy's names in different trademark systems:

Beiye

China Standard

America

Germany

France

BYP30

4J45

Carpanter

G.S.46

Ferrovac 46 Ni

Allegheng

Alloy 46

Glass4

Nilo44

Vacodill 46

Ni42

N48



kovar thermal expansion

The Typical Applications of This Alloy are

  • Precision membrane impedance

  • Synthetic sapphire

  • Soft glass

  • Ceramic sealing

  • Welding electrodes for cast iron


Typical Chemical Composition in Percent


Ni

44.5~45.5

Fe

bal.



Typical Linear Expansion Coefficient


25℃-300℃

6.5~7.2

25℃-400℃

6.5~7.2 (α, 10-6-1)



Typical Mechanical Properties


Tensile Strength

Soft

Hard


<590 MPa (85.6 ksi)

>700 Mpa (101.5 ksi)

Hardness

Thickness

Deep-drawing State


>0.2~2.5mm

≤165HV

>2.5mm

≤170HV

Gain Size

Deep-drawing State: ≥Level 7



Typical Physical Properties

Density

8.18 g/cm3 (0.293 lb/in3)

Melting Point

1430 ℃ (2606 ℉)

Resistivity

49 µΩ•cm

Thermal conduction

15 W/K

Elastic modulus

161 Gpa



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