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4J29/4J32

Precision Alloy Series

4J29/4J32

Application

4J29 is mainly used for electric vacuum components such as emission tubes, oscillator tubes, ignition tubes, magnetrons, transistors, sealed plugs, relays, integrated circuits, lead wires, chassis, shells, brackets, etc., glass sealing, in the application of the glass should be made to select the coefficient of expansion of the alloy and alloy match, according to the temperature of the use of the low-temperature organisational stability of the strict test, the processing should be carried out in an appropriate heat treatment to ensure that the material has a good deep-drawn elongation. The material has good deep-drawn performance, when the use of forging material should be rigorously tested for airtightness.

4J32 is suitable for a variety of instruments, instrumentation parts, thermal bimetallic passive layer and resonance cavities that require dimensional stability.

    CHEMICAL COMPOSITION

    Eraum Alloy

    %

    C

    Mr

    Si

    P

    C

    Cu

    Cr

    Mb

    Ni

    Co

    4J29

    MIN

    -

    -

    -

    -

    -

    -

    -

    -

    28.5

    16.8

    MAX

    0.03

    0.5

    0.3

    0.02

    0.02

    0.2

    0.2

    0.2

    29.5

    17.8

    4J32

    MIN

    -

    0.2

    -

    -

    -

    0.4

    -

    -

    31.5

    3.2

    MAX

    0.05

    0.6

    0.2

    0.02

    0.02

    0.8

    -

    -

    33

    4.2

    EXECUTIVE STANDARD

    4J29

    4J32

    GB/T 15018-1994

    GB/T 15018-1994

    YB/T 5231-1993

    YB/T 5241-1993

    Product Characteristics

    4J29 has a linear expansion coefficient similar to that of silicon-boron hard glass at 20~450°C. It has a high Curie point and good low-temperature organisational stability. The oxide film of the alloy is dense and can be well
    The oxide film of the alloy is dense and can be well infiltrated by the glass. And does not interact with mercury, suitable for use in instruments containing mercury discharge. It is the main sealing structure material for electric vacuum devices.
    4J32 alloy, also known as Super-Invar alloy, is a low-expansion iron-nickel drilling alloy with a low coefficient of expansion in the range of 20-100℃.

    Product Dispaly

    • 4J294J32_display (1)pv3
    • 4J294J32_display (2)oyh
    • 4J294J32_display (3)2v0