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4J36/4J42

Precision Alloy Series

4J36/4J42

Application

4J36 Requirements for dimensional stability of various instruments, instrumentation parts, heating bimetallic passive layer, resonant cavity.

4J42 is mainly used and soft glass, ceramics and other sealing, the production of electronic tubes, transistors and integrated circuits lead, frame and sealing plug.

    CHEMICAL COMPOSITION

    Eraum Alloy

    %

    C

    P

    S

    Mn

    Si

    Ni

    Co

    AI

    Fe

    4J36

    MIN

    -

    -

    -

    0.2

    -

    35

    -

    -

    cushion

    MAX

    0.05

    0.02

    0.02

    0.6

    0.3

    370

    -

    -

    cushion

    4J42

    MIN

    -

    -

    -

    -

    -

    410

    -

    -

    cushion

    MAX

    0.05

    0.02

    0.02

    0.8

    0.3

    42.5

    1

    0.1

    cushion

    Physical Properties

    Density
    g/cm3

    Resistivity
    μΩ.m

    Specific heat capacity
    J/(KG-°C)

    Curie point
    Tc/°C

    Thermal conductivity into
    W/(M-°C)

    Melting temperature

    8.12

    0.61

    502

    360

    14.6

    1430

    EXECUTIVE STANDARD

    4J29

    4J32

    GB/T 15018-1994

    YB/T5231-1993

    -

    YB/T5235-1993

    -

    YB/T5235-2005

    Product FEATURE

    4J36, also known as Invar 36 alloy, is a special, low-expansion iron-nickel alloy with an ultra-low coefficient of expansion (CTE); it has a low linear coefficient of thermal expansion in the range of 20-100°C. 4J42 alloy has a constant coefficient of thermal expansion (CTE) that matches that of hard glass, soft glass, and ceramics.
    Alloy 4J42 is an iron-nickel alloy with a constant coefficient of expansion, its coefficient of thermal expansion (CTE) matches that of hard glass, soft glass, ceramics, and can be hermetically sealed through the glass-to-metal sealing process to achieve hermetically sealed packaging housings; CTE closure of commonly used alumina, oxidative plated LTCC, and AlN circuit board substrates; total magnetic energy and excellent electrical properties; and good machining, plating, and soldering properties.

    Product Dispaly

    • 4J364J42 (1)q9u
    • 4J364J42 (2)m84
    • 4J364J42 (3)pj6