Alloy 46,UNS K94600,(Fe-46Ni),Chinese 4J46
Grade & Chemical Composition (see Table 1)
Table 1 Grade & Chemical Composition
Grade | Chemical Composition (%) | ||||||||
C | P | S | Mn | Si | Ni+Co+Cu | Co | Cu | Fe | |
≤ | |||||||||
4J46 | 0.05 | 0.020 | 0.020 | 0.40 | 0.30 | 45.0～46.0 | 5.0～6.0 | 3.0～4.0 | Balance |
Notes:
1、Under condition that the average coefficient of the linear expansion meets the requirements of the standard, the content of nickel, cobalt and copper 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 2 coefficient of linear expansion
Grade | Heat treatment of samples | Average coefficient of linear expansion | ||
20～300°C | 20～400°C | 20～500°C | ||
4J46 | Heat to 850～900°C in a protective atmosphere or in vacuum condition, hold for 1 hour, and then cool to 300℃ at a rate less than 300℃/h | 5.5～6.5 | 5.6～6.6 | 7.0～8.0 |
Notes:
1. The Vickers hardness of the annealed strip (sheet) should be no more than 170.
2. For the unannealed strip (sheet) delivered, after heat treat at 900℃, and then hold for 30 min, the Vickers hardness should be no more than 170.
Typical Property (see Table 3—Table 6)
Table 3 coefficient of linear expansion
Grade | Average coefficient of linear expansion in different temperature, ā/(10-6/K) | |||||
20～100℃ | 20～200℃ | 20～300℃ | 20～400℃ | 20～500℃ | 20～600℃ | |
4J46 | 6.8 | 6.5 | 6.4 | 6.4 | 7.9 | 9.3 |
Table 4 Mechanical Property
Grade | Heat treatment temperature,℃ | Tensile strength, sb/MPa | Tensile stretch, δ(%) | Vickers hardness | Grain size |
4J46 | 750 | 527.5 | 34.8 | 137.4 | 7 |
850 | 510 | 35.4 | 134.6 | 6 | |
950 | 483.5 | 36.7 | 128.1 | 6～5 | |
1050 | 466.5 | 34.3 | 125.6 | 5～4 |
Table 5 Magnetic Property
Grade | magnetic induction | remanent magnetic induction/ Br/T | coercivity | maxmum perameability | |
B10/T | Bl00/T | ||||
4J46 | 1.58 | 1.6l | 0.31 | 2.96 | 55.5 |
Table 6 Other Propertise of the Alloy
Grade | modulus of elasticity | Resistivity | thermal conductivity200℃/[W/(m•K)] | Density/(g/cm3) |
4J46 | 137500 | 0.54 | 20.1 | 8.18 |
Usage: This alloy has a constant average linear expansion coefficient at the range of 20 °C to 500 °C. It is mainly used with 95% aluminum oxide ceramic to form air tight seal in vacuum electronics.
Specification: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
