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Beiye, a national high-tech enterprise with over 65 years of expertise since 1960, specializes in non-magnetic controlled expansion alloys and non-magnetic steel alloys. Our 4J78, 4J80, and 4J82 expansion alloys are engineered for non-magnetic sealing in electronic devices and vacuum seal welding with high alumina ceramics. With a global presence serving 1,000+ customers across 40+ countries, Beiye is a specialized precision alloy manufacturing company that offers customized, high-precision solutions with multiple varieties and small-batch production capabilities.
65+ Years of Expertise: Industry leader in precision alloy and supply.
Non-Magnetic Properties: Magnetic permeability ≤1.263 μH/m ensures compatibility with sensitive electronic applications.
Low Thermal Expansion: Precise control of expansion coefficients for dimensional stability in high-tech environments.
Global Trust: Serving 1,000+ customers in 40+ countries with reliable delivery.
Tailored Solutions: Flexible specifications for specialized sealing and welding needs.
Non-magnetic materials are substances that do not exhibit magnetic properties, meaning they are not attracted to magnets and cannot be magnetized. These materials lack unpaired electrons in their atomic or molecular structure or have structures that cancel out magnetic moments.
Characteristics:
No Magnetic Attraction: They do not respond to magnetic fields (e.g., not attracted to a magnet).
Diamagnetic or Paramagnetic: Most non-magnetic materials are diamagnetic (weakly repelled by magnetic fields) or weakly paramagnetic (slightly attracted but not magnetizable).
Low Magnetic Permeability: They have permeability close to that of free space, meaning magnetic fields pass through them with minimal interaction.
Stable Electron Configurations: Their electrons are paired, resulting in no net magnetic moment.
Examples:
Metals: Aluminum, copper, lead, tin, titanium, zinc, and alloys like brass and bronze.
Non-Metals: Plastics, wood, glass, ceramics, rubber, and water.
Specific Alloys: Austenitic stainless steels (e.g., 304, 316) and certain controlled expansion alloys like Kovar (in specific conditions).
Gases: Air, nitrogen, and noble gases like helium.
