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By certification 
Soft magnetic Invar Material 36 Alloy steel strip bars UNS K93600
Invar alloy,ASTM F1684,UNS k93600 (FeNi36),Chinese 4J36
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.
Note: A NickelIron, 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.
Relative Grade:
Grade |
Russia |
U.S.A. |
Japan |
France |
Germany |
U.K. |
4J32 |
32HKA 32HF-BN |
Super-Invar Super Nilvar |
SI |
Invar Superieur |
- |
- |
4J36 |
36H 36H-BN |
Invar Nilvar Unipsan36 |
Cactus LE |
Invar Standard Fe-Ni36 - |
Vacodil36 Nilos36 - |
Invar Nilo36 36Ni |
4J38 |
- |
38NiFM Simonds38-7FM |
- |
- |
- |
- |
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 |
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.
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°C |
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°C 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°C |
20~100°C |
20~200°C |
20~300°C |
20~400°C |
20~500°C |
|
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.
Specification: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
Size Range:
1. Sheet---Thickness 0.1mm~3.5mm, width:≤300mm,Condition: cold rolled, bright, bright annealed
2. Plate---Thickness 3.5mm~40.0mm,width:≤300mm,Condition: cold rolled, hot rolled, annealed
3. Round Wire---Dia 0.1mm~Dia 5.0mm,Condition: cold drawn, bright, bright annealed
4. Flat Wire---Dia 0.5mm~Dia 5.0mm,length:≤1000mm,Condition:flat rolled, bright annealed
5. 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
6. Capillary---OD 8.0mm~1.0mm,ID 0.1mm~8.0mm,length:≤2500mm,Condition: cold drawn, bright, bright annealed
7. Pipe---OD 120mm~8.0mm,ID 8.0mm~129mm,length:≤4000mm,Condition: cold drawn, bright, bright annealed
