GB/T | AISI/ASTM |
1J79 | Alloy4 |
chemical composition:
Brand | Ni | Fe | C | Mn | Si | P | S | Cu | Mo | |
4J36 | min | 78．5 | 余量 | 0.6 | 0．3 | 3.8 | ||||
max | 80．5 | 0.03 | 1.1 | 0.5 | 0.02 | 0.02 | 0.02 | 4.1 |
Physical properties:
density | 8.6 g/cm³ |
Curie Point | 450℃ |
Mechanical properties of alloys at normal temperature
trademark | Variety | Magnetic performance | |||
Initial PermeabilityμO（mH/m） | Maximum Permeability μm （mH/m） | Coercivity Hc （A/m） | Saturation magnetic induction Bs（T） | ||
1J79 | Cold rolled strip | ≥31 | ≥250 | ≤1.2 | 0.75 |
Bar board | ≥25 | ≥125 | ≤2.4 | 0.75 | |
Features and applications
Various transformers, transformers, magnetic amplifiers, choke cores and magnetic shields with high initial permeability and working in weak magnetic fields.