High Precision Alloy
High Temperature Alloy
◆1J50 has a rectangular hysteresis loop and high saturation magnetic induction. It is mainly used in magnetic field amplifiers, choke coils, rectifier coils, and computer device components working in medium magnetic fields.
◆1J79 has a high initial magnetic permeability, and is suitable for various transformers, transformers, magnetic amplifiers, choke cores and magnetic shields working in weak magnetic fields.
◆3J53 has a low frequency temperature coefficient in the range of -40-80°C, and is used for the vibrator in the mechanical filter, the reed of the vibration relay and other components.
◆4J29(F15) has a linear thermal expansion coefficient similar to that of hard glass within a certain temperature range, and is used for matching with hard glass in the vacuum industry.
◆4J36 is a special low-expansion iron-nickel alloy with ultra-low expansion coefficient, which is used in the environment requiring extremely low expansion coefficient.
◆4J42 is mainly used in the manufacture of electric vacuum devices, precision instruments, astronomical geodetic equipment with high stability requirements, etc.
Chemical composition
|
Grade |
C |
Si |
Mn |
S |
P |
Cr |
Ni |
Mo |
Cu |
Fe |
Al |
Co |
Ti |
|
no greater than |
|||||||||||||
|
1J50 |
0.03 |
0.15～0.3 |
0.3～0.6 |
0.02 |
0.02 |
- |
49.5～50.5 |
－ |
≤0.2 |
base |
— |
— |
— |
|
1J79 |
0.03 |
0.3～0.5 |
0.6～1.1 |
0.02 |
0.02 |
- |
78.5～80.5 |
3.8～4.1 |
≤0.2 |
base |
— |
— |
— |
|
3J53 |
0.05 |
0.8 |
0.8 |
0.02 |
0.02 |
5.2～5.8 |
41.5～43 |
0.7～0.9 |
— |
base |
0.5～0.8 |
— |
2.3～2.7 |
|
4J29 |
0.03 |
0.3 |
0.5 |
0.02 |
0.02 |
＜0.2 |
28.5～29.5 |
＜0.2 |
≤0.2 |
base |
— |
16.8～17.8 |
— |
|
4J36 |
0.05 |
0.3 |
0.2～0.6 |
0.02 |
0.02 |
- |
35～37 |
－ |
— |
base |
— |
— |
— |
|
4J42 |
0.05 |
0.3 |
0.8 |
0.02 |
0.02 |
- |
41.5～42.5 |
— |
— |
base |
≤0.1 |
≤1.0 |
- |
Alloy property minimum
|
Grade |
Variety |
Magnetic properties |
||
|
Initial permeability uo(MH/m) |
Maximum Permeability(Uh/m) |
Coercivity Hc(A/m) |
||
|
1J79 |
Cold rolled strip |
≥31 |
≥250 |
≤1.2 |
|
stick wire board |
≥25 |
≥125 |
≤2.4 |
|
|
1J50 |
Cold rolled strip |
≥3.8 |
≥62.5 |
≤9.6 |
|
Forged (rolled) bars |
≥3.1 |
≥31.3 |
≤14.4 |
|
|
Grade |
state |
Elastic Modulus E(Mpa) |
tensile strength b(N/m㎡) |
Hardness Hv |
|
3J53 |
cold working + aging |
190000～215600 |
1170～1760 |
400～480 |
|
Grade |
Average Linear Expansion Coefficient(10-6℃) |
||||||
|
20～100℃ |
20～300℃ |
20～400℃ |
20～450℃ |
20～500℃ |
20～530℃ |
20～600℃ |
|
|
4J29 |
— |
— |
4.6～5.2 |
5.1～5.5 |
— |
— |
— |
|
4J50 |
— |
9.2～10 |
9.2～9.9 |
— |
— |
— |
— |
|
4J36 |
— |
≤1.5 |
— |
— |
— |
— |
— |
|
4J42 |
5.5 |
4.6 |
5.8 |
6.7 |
7.6 |
— |
9.1 |
