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PRODUCTS:Invar Alloy
GRADE:4J32、4J36、4J38
PRODUCTION STANDARD:YB/T5241-2005
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  • PRODUCTS DETAILS
  • SPECIFICATION
    Introduction: 

    Invar, also known generically as FeNi36 (64FeNi in the US), is a nickel–iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or α). The name Invar comes from the word invariable, referring to its relative lack of expansion or contraction with temperature changes.
    A Nickel-Iron, low expansion alloy containing 36% Nickel. It maintains nearly constant dimensions over the range of normal atmospheric temperatures and has a low coefficient of expansion from cryogenic temperatures to about +500°C. Nilo 36 also retains good strength and toughness at cryogenic temperatures. Applications include standards of length, thermostat rods, laser components and tanks and piping for the storage and transportation of liquefied gasses. 
    Invar is used where high dimensional stability is required, such as precision instruments, clocks, seismic creep gauges, television shadow-mask frames,valves in motors, and antimagnetic watches. In land surveying, when first-order (high-precision) elevation leveling is to be performed, the Level staff (leveling rod) used in made of Invar, instead of wood, fiberglass, or other metals. Invar struts were used in some pistons to limit their thermal expansion inside their cylinders.




    *Invar alloy, ASTM F1684, UNS k93600 (FeNi36)Chinese 4J36



    Relative Grade

    Grade

    Russia

    U.S.A.

    Japan

    France

    Germany

    U.K.

    4J32

    32НКД

    32НК-ВИ

    Super-Invar

    Super Nilvar

    SI

    Invar

    Superieur

    -

    -

    4J36

    36Н

    36Н-ВИ

    Invar

    Nilvar

    Unipsan36

    Cactus LE

    Invar Standard

    Fe-Ni36

    -

    Vacodil36

    Nilos36

    -

    Invar

    Nilo36

    36Ni

    4J38

    -

    38NiFM

    Simonds38-7FM

    -

    -

    -

    Free Cut Invar36

      Grade & Chemical Composition (see Table 1)

    Table 1 Grade & Chemical Composition

    Grade

    Chemical Composition (%)

    C

    Si

    P

    S

    Cu

    Se

    Mn

    Ni

    Co

    Fe

    4J32

    0.05

    0.20

    0.020

    0.020

    0.400.80

    0.200.60

    31.533.0

    3.204.20

    Bal

    4J36

    0.05

    0.30

    0.020

    0.020

    0.200.60

    35.037.0

    Bal

    4J38

    0.05

    0.20

    0.020

    0.020

    -

    0.100.25

    0.80

    35.037.0

    -

    Bal

    4J40

    0.05

    0.15

    0.020

    0.020

    -

    -

    ≤0.25

    32.433.4

    7.008.00

    Bal

    NOTES: 1Under condition that the average coefficient of the linear expansion meets the requirements of the standard, the content of nickel and cobalt are allowed to deviate from the stated range.

             2The shape and dimensions of the alloys are in compliance with GB/T14985.

       Physical Property (see Table 2 –Table 3)

    Table 2 Coefficient of Linear Expansion

    Grade

    Heat Treatment of the Samples

    Mean Coefficient of Linear Expansion

    20l00

    20300°C

    4J32

    To heat the semi-finished products samples to 840±10°C, hold for 1hour, and quench in the water. Machine the samples to finished samples. And heat at 315±lO for 1h, furnace or air cool.

    ≤1.0

    4J36

    ≤1.5

    4J38

    4J40

    ≤2.0

    Table 3 Typical Expansion Coefficient

    Grade

    Mean Coefficient of Linear Expansion

    20~50

    20100

    20200

    20300

    20400

    20500

    4J32

    0.7

    0.8

    1.4

    4.3

    7.2

    9.3

    4J36

    0.6

    0.8

    2.0

    5.1

    8.0

    10.0

    4J40

    1.4

    1.3

    1.2

    1.7

    4.5

     


    Note: The data in the tables are just for reference.

    Usage: Grade 4J32 and 4J36 are suitable for environmental temperature, make dimensional precision parts for instrumentation. 4J38 are used for easy to cut alloys. 4J40 are used for parts that require low expansion at high temperatures.















    Specification:
    Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube

    Size Range:
    *Sheet---thickness 0.05mm~3.5mm, width:≤350mm,Condition: cold rolled, bright, bright annealed
    *Plate---thickness 3.5mm~40.0mm,width:≤300mm,Condition: cold rolled, hot rolled, annealed
    *Round Wire---Dia 0.1mm~Dia 5.0mm,Condition: cold drawn, bright, bright annealed
    *Flat Wire---Dia 0.5mm~Dia 5.0mm,length:≤1000mm,Condition:flat rolled, bright annealed
    *Bar---Dia 5.0mm~Dia 8.0mm,length:≤2000mm,Condition:cold drawn,bright, bright annealed
           Dia 8.0mm~Dia 32.0mm,length:≤3000mm,Condition:hot rolled,bright, bright annealed
           Dia 32.0mm~Dia 180.0mm,length:≤1300mm,Condition:hot forging,peeled, turned, hot treated
    Capillary---OD 8.0mm~1.0mm,ID 0.1mm~8.0mm,length:≤2500mm,Condition: cold drawn, bright, bright annealed
    Pipe---OD 120mm~8.0mm,ID 8.0mm~129mm,length:≤4000mm,Condition: cold drawn, bright, bright annealed

    Note: we could do any other products with specified technical standard, say, ASTM,SAE,DIN,S.E.W.,JIS,ISO,IEC,NF,BS,ΓОСТ.PLS contact us for more information: Tel: +86-29-89396652 or e-mail us at: Sales@xaleipeng.com

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