Key Features of 40Mn18Cr3 Non-Magnetic Steel
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Non-Magnetic Performance: Maintains low magnetic permeability even in strong magnetic fields—ideal for critical electrical environments.
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Low Eddy Current Loss: At a magnetic field strength of 16,000 A/m (200 Oe), the magnetic permeability μ ≤ 1.319 × 10⁻⁶ H/m, minimizing eddy current losses.
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High Electrical Resistivity: Reduces power losses in alternating current (AC) applications.
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Stable Austenitic Structure: Resistant to magnetization even after cold working, unlike standard stainless steels.
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Excellent Mechanical Strength: Achieved through solution treatment, semi-hot or cold deformation, making it suitable for heavy-duty components.
Equivalent and Related Grades
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20Mn23AlV
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45Mn17Al3 (917)
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30Mn20Al3
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40Mn18Cr4V
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50Mn18Cr4V
Typical Applications
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Non-magnetic retaining rings in turbo-generators (Category I, Class III)
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High-performance electrical and electromagnetic equipment
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Structural parts requiring high strength and non-magnetic behavior
Looking for reliable non-magnetic steel solutions for your transformer or generator projects? 40Mn18Cr3 alloy delivers low permeability, high resistivity, and mechanical durability—making it a smart choice for demanding electrical environments. Contact us today for detailed specifications, pricing, and processing support.
40Mn18Cr3 Non-Magnetic Steel Mechanical Properties:
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(δ5%) |
Cold Bend (180°d=2a) |
Magnetic Permeability （μ=B / H） |
| ≥530 | ≥300 | 30 | OK | ≤1.05 |
