China Non-Magnetic Fasteners Suppliers in China - Precision Machinery & Aerospace Factory Solutions Suppliers, Exporters

Non-magnetic stainless steel is a specialized type of stainless steel known for its remarkable resistance to magnetism, making it ideal for a variety of applications. This material exhibits extremely low magnetism, ensuring minimal response to magnetic fields. As a leading product among various China suppliers, our non-magnetic stainless steel is perfect for industries that require precision and reliability. Sourced directly from our state-of-the-art factory, this stainless steel guarantees high quality and performance, meeting the demanding standards of modern engineering and manufacturing

Product Description

Products Features

  • 1
    Magnetic-free Characteristic
    Titanium alloy fasteners take advantage of the completely non-magnetic property of titanium metal, which makes them suitable for precision machinery and aerospace applications, avoiding magnetic interference to the equipment.
  • 2
    Austenitic Stainless Steel (e.g. 302HQ)
    Usually exhibits non-magnetic or weak magnetic properties, making it suitable for applications in electronic instruments and other scenarios.
  • 3
    Advantages of Material Properties
    ▶ Titanium Alloy: Low density, high strength, strong corrosion resistance (especially suitable for seawater and chemical environments), and high temperature resistance (maintains performance at 500℃).
    ▶ Austenitic Stainless Steel (304, 316, etc.): Enhanced in corrosion resistance by adding elements like Mo and Cu, with excellent cold working properties.
  • 4
    Processing and Usage Precautions
    ⚠ Important Notice
    Stainless steel fasteners may exhibit slight magnetic properties after cold heading due to processing stress — this is not a material defect. Be vigilant against the low-quality trap of "non-magnetic and non-nickel" stainless steel. Authenticity should be determined through material certification and craftsmanship assessment.

Application

Non-magnetic fasteners, due to their unique anti-magnetic interference properties, play an irreplaceable role in precision instruments, medical equipment, aerospace and other fields.

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1. MRI Equipment

Used for fixation of the magnetic resonance imaging system to prevent ferromagnetic materials from interfering with the uniformity of the magnetic field and to ensure imaging accuracy.

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2. Navigation System

Components of satellites and aircraft should be made of non-magnetic materials (such as beryllium-cobalt copper C17500) to avoid interfering with gyroscopes and magnetometers.

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3. Radar Equipment

High-frequency signal transmission components need to be connected through non-magnetic connectors to reduce signal distortion.

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4. Precision Instruments

High-precision electronic measuring equipment (such as spectrometers) uses non-magnetic connectors to prevent signal drift.

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5. Quantum Laboratory

Superconducting quantum bits are extremely sensitive to magnetic fields. Non-magnetic fasteners (such as PEEK material) are essential components.

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6. Wind Power Equipment

Amorphous alloy bolts are used for the transformer core to reduce eddy current losses.

Our Non-Magnetic Series Stainless Steel Mainly Includes the Following

Main Types of Non-Magnetic Fasteners
A286 1.498 Gr.660
OCr21Ni6Mn9N OCr16Ni22Mn9Mo2 1.4436

Frequently Asked Questions (FAQ)

Q What makes titanium alloy fasteners non-magnetic?
Titanium is an inherently non-magnetic metal. Its atomic structure does not support ferromagnetism, which means titanium alloy fasteners produce no magnetic field and are unaffected by external magnetic fields. This makes them ideal for use in sensitive environments such as MRI suites, aerospace navigation systems, and precision measurement equipment.
Q Why can stainless steel fasteners become slightly magnetic after cold heading?
During the cold heading process, mechanical stress can cause a partial phase transformation in austenitic stainless steel — converting some austenite into martensite, which is magnetic. This is a processing-induced effect and does not indicate a flaw in the base material. The degree of magnetism depends on the alloy composition and the extent of cold working applied.
Q What is the difference between A286, 1.498, and Gr.660 non-magnetic fasteners?
A286, 1.498, and Gr.660 are different designations for the same iron-nickel-chromium superalloy used in high-temperature and non-magnetic applications. A286 is the common US designation, 1.498 is the European material number, and Gr.660 refers to the ASTM standard grade. All refer to the same alloy with excellent strength, corrosion resistance, and non-magnetic properties.
Q How can I verify that a fastener is truly non-magnetic?
The most reliable methods include requesting a material test certificate (MTC) from the manufacturer, performing a permeability test using a gaussmeter or ferrite scope, and verifying the alloy composition through spectrographic analysis. Avoid relying solely on a simple magnet test, as it may not detect weak magnetism that could still interfere with sensitive equipment.
Q Which non-magnetic fastener material is best suited for medical applications like MRI machines?
For MRI equipment, materials with near-zero magnetic permeability are required. Titanium alloys (Grade 2 or Grade 5), austenitic stainless steels (such as 316L), and PEEK (polyether ether ketone) polymer fasteners are commonly used. Titanium is often preferred due to its combination of biocompatibility, strength, and complete non-magnetism.
Q What is the maximum operating temperature for titanium alloy non-magnetic fasteners?
Titanium alloy fasteners can maintain their mechanical performance and non-magnetic properties at temperatures up to approximately 500℃ (932°F). Beyond this range, titanium may experience oxidation and strength reduction. For higher-temperature environments, superalloys such as A286 (Gr.660) are recommended, as they offer stable performance at elevated temperatures up to around 700℃.

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