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*Invar alloy, ASTM F1684, UNS k93600 (FeNi36), Chinese 4J36
Invar alloy is 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.
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 |
Balance |
|
4J36 Invar 36 |
0.05 |
0.30 |
0.020 |
0.020 |
|
|
0.20~0.60 |
35.0~37.0 |
|
Balance |
4J38 |
0.05 |
0.20 |
0.020 |
0.020 |
- |
0.10~0.25 |
0.80 |
35.0~37.0 |
- |
Balance |
4J40 |
0.05 |
0.15 |
0.020 |
0.020 |
- |
- |
≤0.25 |
32.4~33.4 |
7.00~8.00 |
Balance |
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.We could do any other products with specified technical standard, say,
ASTM,SAE,DIN,S.E.W.,JIS,ISO,IEC,NF,BS.PLS email us about your standard requests.
Physical Property (see Table 2 –Table 3)
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±10℃ for 1h, furnace or air cool. |
≤1.0 |
|
|
4J36 Invar 36 |
≤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 Invar 36 |
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
Note: We could do any other products with specified technical standard, say, ASTM,SAE,DIN,S.E.W.,JIS,ISO,IEC,NF,BS.PLS contact us for more information: Tel: +86-29-33669103 or e-mail us at: webmaster@
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