*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
|
0.40～0.80
|
|
0.20～0.60
|
31.5～33.0
|
3.20～4.20
|
Bal
|
|
4J36
|
0.05
|
0.30
|
0.020
|
0.020
|
|
|
0.20～0.60
|
35.0～37.0
|
|
Bal
|
|
4J38
|
0.05
|
0.20
|
0.020
|
0.020
|
-
|
0.10～0.25
|
0.80
|
35.0～37.0
|
-
|
Bal
|
|
4J40
|
0.05
|
0.15
|
0.020
|
0.020
|
-
|
-
|
≤0.25
|
32.4～33.4
|
7.00～8.00
|
Bal
|
NOTES:
1、Under 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.
2、The 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
|
|
20～l00℃
|
20～300°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℃
|
20～100℃
|
20～200℃
|
20～300℃
|
20～400℃
|
20～500℃
|
|
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,
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