Ohmalloy Material Co.,Ltd
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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.