1J79 1J85 Soft Magnetic Alloy Core Permalloy Strip 0.05mm for
Transformer
Ohmalloy-1J79 1J85 is a nickel-iron soft magnetic alloy with about
80%nickel content and 20%iron content. Physicist Gustave Elman
invented it in 1914 at bell telephone labs, known for its high
magnetic conductivity, which allows it to be used as a core
material for electrical and electronic equipment or to shield
magnetic fields. The relative magnetic conductivity of commercial
permalloy alloys is generally around 100,000, compared to several
thousand for ordinary steel.
In addition to its high magnetic conductivity, its other magnetic
properties include low recalcitrant force, near-zero magnetic
telescopicity, and significant anisotropic magnetic resistance. Low
magnetic telescopicity is critical for industrial applications and
allows it to be used in films, otherwise variable stresses can lead
to devastating changes in magnetic performance. Depending on the
strength and direction of the added magnetic field, the resistivity
of pomo alloys can vary by up to 5%. When the nickel concentration
is 80%, Pomo alloys usually have a surface-core cubic crystal
structure with a lattice constant of about 0.355 nm. One drawback
of Pomo alloys is that they are not very malleable and do not work,
so complex shape applications, such as magnetic shielding, are made
of other high-conductive alloys, such as mu metal. Pomo alloys are
used for transformer plates and magnetic recording heads.
Ohmalloy-1J79 1J85 is widely used in the radio electronics
industry, precision instruments, remote control and automatic
control systems.
1J79 Normal Composition%
| Ni | 78.5~80.0 | Fe | Bal. | Mn | 0.6~1.1 | Si | 0.3~0.5 |
| Mo | 3.8~4.1 | Cu | ≤0.2 | | | | |
| C | ≤0.03 | P | ≤0.02 | S | ≤0.02 | | |
1J85 Normal Composition%
| Ni | 79.0~81.0 | Fe | Bal. | Mn | 0.3~0.6 | Si | 0.15~0.3 |
| Mo | 4.8~5.2 | Cu | ≤0.2 | | | | |
| C | ≤0.03 | P | ≤0.02 | S | ≤0.02 | | |
Typical Mechanical Properties(1J79,1J85)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 980 | 1030 | 3~50 |
Typical Physical Propeties(1J79,1J85)
| Density (g/cm3) | 8.75 |
| Electrical resistivity at 20℃(Ωmm2/m) | 0.56 |
| Coefficient of linear expansion(20℃~200℃)X10-6/℃ | 10.9~11.2 |
| Saturation magnetostriction coefficient λθ/ 10-6 | 0,5 |
| Curie point Tc/ ℃ | 400 |
1J79 Style of Supply
| Alloys Name | Type | Dimension |
| OhmAlloy-1J79 | Wire | D= 0.1~8mm |
| OhmAlloy-1J79 | Strip | W= 8~390mm | T= 0.3mm |
| OhmAlloy-1J79 | Foil | W= 10~100mm | T= 0.01~0.1 |
| OhmAlloy-1J79 | Bar | Dia= 8~100mm | L= 50~1000 |
| Mode of heat treatment 1J79 |
| Annealing media | Vacuum with a residual pressure not higher than 0.1Pa, hydrogen
with a dew point of not higher than minus 40 ℃. |
| The heating temperature and rate | 1100~1150℃ |
| Holding time | 3~6 |
| Cooling rate | With 100 ~ 200 ℃/ h cooled to 600 ℃, rapidly cooled to 300℃ |
1J85 Style of Supply
| Alloys Name | Type | Dimension |
| OhmAlloy-1J85 | Wire | D= 0.1~8mm |
| OhmAlloy-1J85 | Strip | W= 8~390mm | T= 0.3mm |
| OhmAlloy-1J85 | Foil | W= 10~100mm | T= 0.01~0.1 |
| OhmAlloy-1J85 | Bar | Dia= 8~100mm | L= 50~1000 |
| The magnetic properties of alloys with high permeability in weak
fields(1J85) |
| 1J85 | Initial permeability | Maximum permeability | Coercivity | Saturation magnetic induction intensity |
Cold-rolled strip/ sheet. Thickness, mm | μ0.08/ (mH/m) | μm/ (mH/m) | Hc/ (A/m) | BS/ T |
| ≥ | ≤ |
| 0.01 mm | 20 | 87.5 | 4.8 | 0.75 |
| 0.1~0.19 mm | 37.5 | 187.5 | 1.6 |
| 0.2~0.34 mm | 50 | 225 | 1.2 |
| 0.35~1.0 mm | 62.5 | 312.5 | 0.8 |
| 1.1~2.5 mm | 50 | 187.5 | 1.2 |
| 2.6~3.0 mm | 43.8 | 150 | 1.44 |
| cold drawn wire | | | |
| 0.1 mm | 8.7 | 37.6 | 6.4 |
| Bar | | | |
| 8-100 mm | 37.5 | 125 | 1.6 |
Package
FAQ
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you
want.
If we do not have, for spool wire, we can produce 1 spool, about
2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have account, wire transfer for sample amount also ok.
3. Customer do not have express account. How will us arrange the
delivery for sample order?
Just need to provide your address information, we will check the
express cost, you can arrange the express cost together with sample
value.
4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery
and total amount. Let's talk more in details after getting your
detailed requirements.
5. Do you provide free samples?
If you want several meters and we have stock of your size, we can
provide, customer need to bear the International express cost.
6. What's our working time?
We will give you reply through email/phone Online contact tool
within 24 hours. No matter working day or holidays.
