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PRODUCTS:Axle-centre alloy
GRADE:3J40
PRODUCTION STANDARD:YB/T 5256-1993
Views:992
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  • SPECIFICATION

    Introduction:

    It is applied to produce the axle-centre of instrument and meter as well as the axle-centre of the staff.



    Shock-proof & Wear Resistant axle-centre alloyYB/T5243-1993

    Relative Grade40ХНЮ-ВИЭП793  Russia

    Grade and Chemical Composition (see Table1)

    Table1 Grade and Chemical Composition

    Grade

    Chemical Composition (%)

    C

    P

    S

    Mn

    Si

    Fe

    Cr

    A1

    Ce

    Ni

    3J40

    0.03

    0.010

    0.010

    0.10

    0.20

    0.50

    39.041.0

    3.303.50

    0.100.2

    Bal

        Based on addition.

       Mechanical Property (see Table 2)

    Table 2  Mechanical Property

    Statue

    Vickers Hardness/ HV

    Commended Heat Treatment

    Bend Test

    The radius of the mandrel is twice as the diameter of the alloy

    I

     

    Cold Drawing

    450510

     

    Bend 90 degrees. No cracks and broken on the outside of the bending

    Cold Drawn & Aging

    780830

    >830880

    >880

    480540°C

    Keep warm for 5h

     

    NOTE: 1The default hardness classification of the alloy wire in cold drawing & aging status is class II.

    Physical Property (see Table 3Table 5)

    Table 3 Coefficient of Linear Expansion

    State

    Coefficient of Linear Expansion/(10-6/K)

    2055

    20100

    20200

    20300

    20400

    20500

    Solid Solution

    12.212.7

    12.412.5

    12.612.8

    13.013.1

    13.513.6

    13.814.0

    Solid Solution&aging

    11.011.5

    11.912.0

    12.012.2

    12.412.5

    12.712.8

    13.113.3

    Cold drawn & aging

    11.6

    12.0

    12.1

    12.4

    12.8

    13.3

    Table 4 Modulus of Elasticity & Frequency Temperature Coefficient

    State

    Modulus of Elasticity

    Temperature Coefficient  βf/(10-6)

    Mechanical Quality Factor Q20

    20-40

    20100

    Solid Solution +80% Strain Rate

    176500196000

     

     

     

    Solid Solution +80% Strain Rate+Aging 5h

    225500235500

    -103-106

    -104-110

    4900051000

    Table 5 Magnetic Susceptibility & Resistivity

    State

    Magnetic Susceptibility

    Resistivity

    /(μΩ?m)

    Density

    /(g/cm3)

    H=40KA/m

    H80KA/m

    Solid Solution

    3.54.5

    3.54.6

     

    7.6

    Solid Solution+ Aging

    3.84.0

    2.44.2

     

     

    Solid Solution+ Cold Drawing

    2.83.0

     

    1.21

     

    Solid Solution +69% Strain Rate+Aging

     

     

     

    0.78

     

    Corrosion Resisting Property (See Table 5)

    Table 5 Corrosion Resisting Property

    State

    Salt Fog Test

    Long-time store in the air

    Cold Drawing+ Solid Solution+Aging

    No corrosion after 240 hours (Tested by the buyer per JB1606)

    No corrosion

      Usage: It is applied to produce the axle-centre of instrument and meter as well as the axle-centre of the staff

     



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