Sheet, ribbon 79NM - Magnifier 7904
General characteristics
79NM special steel is an iron-nickel alloy (contains up to 82% Ni). 79NM is additionally alloyed with chrome, nickel, molybdenum. Alloy 79NM is characterized by high magnetic permeability and magnetoresistance effect, small coercive force, practically zero magnetostriction. The latter quality makes it possible to use 79HM alloy in precision magnetic-mechanical devices where stability in alternating magnetic field is required. The value of electrical resistance of permalloy 79HM can vary up to 5%, depending on the strength and direction of the magnetic field.
Percentage composition of
| Alloy | C | Ti | Cu | Ni | Cr | Mn | P | S | Si | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy 79H | ≤0,03 | --- | ≤0,2 | 78,5-80 | --- | 0,3-0,6,2 | ≤0,02 | ≤0,02 | 0,15-0,3 | 17,5-19 |
Use
Magnetic field sensors, e.g. in the circuit of the biaxial magnetometer HMC1002. Flat-rolled 79NM is in demand as a shield against magnetic fields - e.g. MRI radiation, as an element of electron microscopes and other ultra-sensitive devices. 79NM is used in production of protective covers for microcircuits and magnetically oversensitive coils.
Comparative electromagnetic properties
The saturation induction values of 79NM high-nickel permalloys are one and a half times less as compared to those of low-nickel ones, and the magnetic permeability is higher than that of low-nickel ones. The latter are characterized by lower resistivity, they are less suitable for use at high frequencies. High-nickel permalloys, similar to 79NM, with rectangular hysteresis loop are of practical importance for computer engineering and automatics.
Supply
All 79NM products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities; mechanical properties of the products. From us you can buy in bulk any semi-finished products for large-scale production. We also offer optimum conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.
Buy at a bargain price
Evek GmbH offers for sale an unlimited range of iron-nickel alloys of the highest quality at a competitive price. If you have difficulty in making a choice, experienced managers who are always available and ready to provide advice are at your service. Order with us and you will get certified products that meet international quality standards in the shortest possible time. If you value your time, contact our nearest office today or place your order online.