Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 45mn17al3 low-magnetic rebar in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
45Mn17Al3 Low‑Magnetic Rebar (also known as Grade 917) is a premium high‑alloy austenitic manganese steel rebar, engineered for ultra‑low magnetic permeability, high tensile strength, and excellent corrosion resistance. As a critical material for magnetic‑sensitive infrastructure, it outperforms conventional carbon steel rebar and even some stainless steel rebars in environments requiring zero magnetic interference.
What Is 45Mn17Al3 Low‑Magnetic Rebar?
45Mn17Al3 belongs to the Fe‑Mn‑Al‑C series of single‑phase austenitic steels, stabilized by high manganese (15–19.5%) and aluminum (2.4–3.6%) content. This stable austenitic microstructure delivers:
Relative magnetic permeability ≤1.02 (near non‑magnetic, 1.319×10⁻⁶ H/m)
High tensile strength ≥1200 MPa (far stronger than standard rebar)
Excellent toughness & workability (resists cracking under heavy loads)
High electrical resistivity (reduces electromagnetic interference)
Good corrosion resistance (suitable for coastal & industrial zones)
Common Specifications
Diameter: 8 mm – 50 mm (custom lengths 1 m – 12 m available)
Standard: GJB 934‑90 (military grade) / GB/T equivalent
Grades: 917‑1 (standard) / 917‑2 (higher strength)
| Feature | 45Mn17Al3 Low‑Magnetic Rebar | Carbon Steel Rebar | Stainless Steel Rebar |
|---|---|---|---|
| Magnetic Permeability | ≤1.02 (near non‑magnetic) | High (ferromagnetic) | Moderate |
| Tensile Strength | ≥1200 MPa | 400–600 MPa | 600–800 MPa |
| Corrosion Resistance | Excellent | Poor | Good |
| Cost Efficiency | High (long service life) | Low (short lifespan) | Very High |
| EMI Shielding | Superior | None | Limited |
Industrial Applications
🏥 Medical & Scientific Facilities
MRI/CT scan rooms: Eliminates magnetic distortion for accurate imaging
Research laboratories: Protects sensitive electronics & precision instruments
⚡ Power & Energy Infrastructure
Generator retaining rings: Reduces magnetic flux leakage in large turbines
Nuclear fusion plants: Non‑magnetic structural components for high‑magnetism zones
Substation & transformer foundations: Prevents electromagnetic interference
🚢 Marine & Shipbuilding
Demagnetization piers: Critical for naval vessel maintenance
Underwater tunnels & ports: Resists saltwater corrosion + non‑magnetic stability
Minesweeper hulls: Avoids triggering magnetic mines
🏗️ Special Construction
Magnetic levitation (maglev) tracks: Ensures stable magnetic guidance
Airport radar foundations: Protects radar signals from steel interference
Data center foundations: Shields servers from electromagnetic noise
ABOUT US:
Sichuan Liaofu Special Steel Company.,Ltd, founded in 2001, is a professional manufacturer and supplier focusing on the production and inventory of stainless steel, special steel, and non-magnetic steel.
With nearly 25 years of experience in the steel industry, we have built a solid reputation for reliability, quality, and professional service in both domestic and international markets. Our core products include non-magnetic 304 stainless steel and non-magnetic 316 stainless steel, which are widely applied in food machinery, marine equipment, medical devices, chemical engineering, architectural decoration, and other fields.
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