Nickel Alloy 1J76 / No. 3 Mu-Metal E11B
is a high-performance
nickel alloy
primarily used for its
magnetic shielding properties
, offering excellent protection against
static and low-frequency magnetic fields
. It is part of the
Mu-metal
family, which is widely known for its
high magnetic permeability
and
low coercivity
.
Nickel Alloy 1J76 / No. 3 Mu-Metal E11B
This alloy is often used in applications where the shielding of sensitive electronics, instruments, or equipment from external magnetic fields is crucial. The alloy is commonly referred to as
Mu-metal
due to its ability to concentrate and guide magnetic fields.
Chemical Composition:
-
Nickel (Ni)
: ~77-80%
-
Iron (Fe)
: ~18-20%
-
Copper (Cu)
: ~5%
-
Molybdenum (Mo)
: Trace amounts
-
Carbon (C)
: Trace amounts
-
Silicon (Si)
: Trace amounts
-
Other elements
: Small quantities of
chromium
,
titanium
, and
manganese
may be present, depending on specific grades.
Key Properties:
|
Property
|
Mu-Metal (1J76)
|
|
Magnetic Permeability (µ)
|
Extremely high (~100,000 - 200,000)
|
|
Nickel Content
|
~77-80%
|
|
Iron Content
|
~18-20%
|
|
Density
|
~8.8 g/cm³
|
|
Tensile Strength
|
~300-500 MPa
|
|
Yield Strength
|
~180-250 MPa
|
|
Melting Point
|
~1,400°C (2,552°F)
|
|
Electrical Resistivity
|
~0.50 μΩ·cm
|
|
Thermal Conductivity
|
~17 W/m·K
|
|
Formability
|
Excellent for thin sheet or foil
|
|
Corrosion Resistance
|
Moderate to good in atmospheric conditions
|
Key Features:
-
High Magnetic Permeability
:
-
The hallmark of
Mu-metal
is its
extremely high magnetic permeability
(typically in the range of
100,000 to 200,000
), which means it can absorb and shield against
low-frequency magnetic fields
. This makes it ideal for
magnetic shielding
applications, as it allows the alloy to attract and direct magnetic lines of force, reducing interference.
-
Magnetic Shielding Effectiveness
:
-
The alloy is specifically designed to offer
high attenuation
of external
magnetic fields
, especially those at low frequencies (e.g.,
50-60 Hz power fields
), which is important for
electronics
,
medical devices
,
scientific instruments
, and
military equipment
sensitive to magnetic disturbances.
-
Low Coercivity
:
-
Mu-metal
alloys, including
1J76
, have a very low
coercivity
, which means they do not retain magnetization after the external magnetic field is removed. This feature is crucial in applications where residual magnetism could interfere with the performance of sensitive devices.
-
Work-Hardening Characteristics
:
-
This alloy exhibits
work-hardening
properties, meaning it becomes harder and stronger as it is deformed, which is beneficial during the manufacturing process, especially when producing thin sheets or foils.
-
Corrosion Resistance
:
-
Mu-metal
has
moderate corrosion resistance
in general environments, although it may require protective coatings in more aggressive conditions, such as
highly acidic or alkaline environments
.
-
Fabrication
:
-
This alloy is highly
formable
, making it ideal for
thin sheets
,
foils
, and
precision parts
. It can be processed by methods such as
cold rolling
,
welding
, and
machining
.
Applications:
-
Magnetic Shielding
: The primary application of
Mu-metal
is in
magnetic shielding
, protecting sensitive equipment from external magnetic interference.
-
Electronics
: Used in
electromagnetic shielding
for devices such as
microelectronics
,
MRI machines
,
X-ray equipment
, and
data storage systems
.
-
Measurement Instruments
: Ideal for
scientific instruments
and
sensors
that need to operate in environments with fluctuating magnetic fields.
-
Aerospace & Military
: Used in
military radar systems
,
guidance systems
, and
aerospace electronics
where electromagnetic interference (EMI) needs to be minimized.
-
Medical Devices
: Essential for protecting
medical imaging equipment
(such as
MRI scanners
) from external magnetic interference.
-
Transformers and Inductors
:
Mu-metal
is used in
transformers
and
inductors
where shielding of magnetic fields is important to improve the performance and efficiency of electrical devices.
Shandong Titanium Nickel Special Steel Co., Ltd., registered funds (one thousand yuan for 10,000 yuan), the company is mainly committed to high -tech enterprises that are integrated with special alloy materials, specializing in the research and sales of special alloys such as nickel -based and iron -based. Products include corrosion-resistant alloys, superalloys, precision alloys, Hastelloy, Monel, INCONEL, INCOLOY, copper-nickel alloys, titanium and titanium alloys, zirconium and zirconium alloys, nickel and nickel-based alloys, nickel-cobalt-based heat-resistant alloys , Hafnium alloy, etc., more than 60 kinds of alloy materials such as special stainless steel. On the basis of stabilizing the quality of the original products, according to the market demand, it solves the quality problems existing in the traditional metallurgical process, and ensures the low miscellaneous and low deflection of the alloy material products, which has won an excellent reputation in the industry.
Product Description
|
Property
|
|
Precision Alloy Steel Sheets
|
|
Material Composition
|
|
Similar to strips, precision alloy sheets are made from carefully controlled compositions, often with low expansion coefficients or specialized magnetic properties, such as
Invar
or
Mu-metal
.
|
|
Thickness
|
|
Precision alloy sheets are thicker than strips, typically ranging from 0.5 mm to several millimeters, depending on mechanical and thermal property requirements.
|
|
Applications
|
|
Commonly used in industries such as aerospace, electronics, and medical devices for components like structural parts, enclosures, and sensitive instrumentation that require controlled mechanical properties and dimensional accuracy.
|
|
Mechanical Properties
|
|
High tensile strength, excellent flatness, and precision in dimensions. These sheets offer stable mechanical properties under both high and low temperature conditions.
|
|
Thermal Properties
|
|
Similar to strips, these sheets are designed for specific thermal behaviors, such as low expansion or high-temperature stability, depending on the alloy (e.g.,
Invar
,
Mu-metal
).
|
|
Electrical Properties
|
|
Precision alloys in sheet form may also have controlled electrical resistance, especially for applications in sensitive electronics or electrical components.
|
|
Magnetic Properties
|
|
Similar to strips, magnetic alloys like
Mu-metal
sheets are used for shielding in sensitive equipment to control or eliminate external magnetic interference.
|
|
Forming & Fabrication
|
|
Precision alloy sheets can be cold-rolled, heat-treated, laser-cut, or stamped. They are suitable for both complex shapes and applications requiring high dimensional tolerance and material consistency.
|
|
Heat Treatment
|
|
Heat treatments like solution annealing or stress-relief are common for precision alloy sheets to improve properties such as strength, stability, and resistance to thermal expansion.
|
|
Welding & Joining
|
|
Precision alloy sheets can be welded or brazed, although welding requires careful control of heat to avoid compromising the alloy's properties.
|
|
Examples of Alloys
|
|
Invar
,
Mu-metal
,
Kovar
,
Constantan
,
Permalloy
|
|
Cost
|
|
Precision alloy sheets are also expensive, as they require precise manufacturing and composition control. Their cost is higher than standard steel or non-precision alloys.
|
|
Common Standards
|
|
ASTM A-240, ASTM B-637, ASTM B-553, AMS 5525
|
Detailed Photos
Key Advantages:
-
Controlled Properties
: Tailored for specific applications, offering controlled expansion, high strength, or high electrical conductivity.
-
Dimensional Stability
: Excellent flatness, accuracy, and stability, even under thermal cycling.
-
High Durability
: Resistant to thermal, mechanical, and magnetic stresses, making them suitable for critical components in sensitive environments.
Factory workshop
Product application
Packaging & Shipping
FAQ
1: What is precision alloy?
Precision alloys refer to special alloys with high purity, uniformity and stability. They are usually used to manufacture parts or components that have extremely strict size, shape and performance requirements. They have special physical properties (such as magnetic, electrical, thermal, etc.) and chemical properties to meet specific engineering requirements.
2: What are the main types of precision alloys?
Precision alloys can be divided into many types according to their different physical properties, mainly including:
Magnetic alloys: Such as soft magnetic alloys and permanent magnetic alloys (hard magnetic alloys).
Elastic alloy: An alloy that can deform reversibly under certain stress or temperature conditions.
Expansion alloy: An alloy with a large linear expansion coefficient within a certain temperature range.
Thermal Bimetal: A composite material composed of two or more metallic materials that exhibit different thermal expansion properties.
Resistive Alloys: Alloys with stable resistivity and constant temperature coefficient of resistance.
Thermoelectric alloy: Alloy with thermoelectric effect.
Hydrogen storage alloy: An alloy with hydrogen storage function.
Shape memory alloy: Alloys with shape memory effect.
Magnetostrictive alloy: A type of metal material with magnetostrictive effect.
3: What are the main application areas of precision alloys?
Precision alloys are widely used in aerospace, automobiles and trains, energy and chemicals, medical equipment, electronics industry, fasteners and other fields. For example, in the aerospace field, precision alloys are used to manufacture aircraft engines, aviation structural parts, missiles, etc.; in the automotive and train field, they are used to manufacture engines, transmission systems, chassis components, tracks, wheels, etc.
4: What is the production process of precision alloy?
The production process of precision alloys includes the selection and pretreatment of alloy raw materials, smelting and casting, heat treatment and processing technology, as well as surface treatment and performance testing. The entire production process requires precise control of each link to ensure that the composition and performance of the alloy meet the requirements.
5: How to detect the quality of precision alloy?
Quality testing of precision alloys is mainly through chemical analysis and physical property testing. Commonly used testing methods include spectral analysis, tensile testing, hardness testing and low-temperature impact testing to ensure that each batch of alloys can meet predetermined technical requirements.
6: What are the significant advantages of precision alloys?
Advantages of precision alloys include:
Has unique physical properties, such as excellent electrical conductivity, thermal conductivity and magnetism.
Excellent mechanical properties, high strength, wear resistance and good elasticity.
Strong corrosion resistance and long service life.
Stable performance in a wide temperature range and wide application.
It has good processing performance and is easy to manufacture precisely.
The ingredients and organization are controllable to meet diverse needs.
7: What kind of performance does precision alloy show in a magnetic field?
Magnetic alloys in precision alloys exhibit excellent magnetic properties in magnetic fields. For example, soft magnetic alloys have high magnetic permeability and low coercivity, are easy to demagnetize, and have low energy loss during cyclic magnetization, making them indispensable materials in electromagnetic equipment.
8.
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