Invar Strip/Invar Alloy Strip
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Invar 36 Strip/ Invar Alloy Strip
Invar Strip is a special ultra-low coefficient of heat expansion of low-iron-nickel alloy. One of carbon and manganese element of control is very important. Cold deformation can reduce the coefficient of thermal expansion, in particular within the framework of the heat treatment temperature coefficient of thermal expansion will enable stabilization. Has the following characteristics:
1.Has very low coefficient of heat expansion between the temperature of -250℃ and 200℃.
2.Good toughness and plastic
Invar Strip Trade Name: 4J32 Super Invar;Invar 36 (Ni36);4j36;
Invar Strip Chemical composition:
Grade | Chemical Composition (%) | |||||||||
Alloy | 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 |
Invar Strip Coefficient of Linear Expansion
Grade | Heat Treatment of the Samples | Mean Coefficient of Linear Expansion | |
Alloys | 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 | ≤1.5 | ||
4J38 | |||
4J40 | ≤2.0 |
Invar 36 Strip Typical Expansion Coefficient
Grade | Mean Coefficient of Linear Expansion | |||||
Alloys | 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