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Dexter Magnetic Technologies
Alnico Properties Table and Curves

Alnico Properties Table and Curves

Product catalog summary

Overview: This document provides technical specifications and properties for various grades of Alnico magnets produced by Dexter Magnetic Technologies Inc. It includes both cast and sintered types, detailing their magnetic and physical properties.

Magnetic Properties: The document lists several grades of Alnico magnets, each with specific magnetic properties such as Maximum Energy Product (BHmax), Residual Induction (Br), Intrinsic Coercivity (Hci), and Coercivity (Hc). These properties are crucial for determining the performance of the magnets in different applications. The maximum operating temperature and Curie temperature are also provided, indicating the thermal limits of each grade.

Physical Properties: The physical properties of both cast and sintered Alnico magnets are detailed, including Curie Temperature, Coefficient of Thermal Expansion, Electrical Resistivity, Density, Rockwell C Hardness, Tensile Strength, and Transverse Modulus of Rupture. These properties help in understanding the mechanical and thermal behavior of the magnets under various conditions.

Graphical Data: The document includes graphs showing the B-H curves for different grades of Alnico magnets at 20°C. These curves illustrate the relationship between magnetic flux density (B) and magnetic field strength (H), providing insights into the magnetic performance of each grade.

Key Grades and Their Properties:

AC200: BHmax = 1.6 MGOe, Br = 7.2 kG, Hci = 0.60 kOe, Hc = 0.58 kOe
AC300: BHmax = 1.35 MGOe, Br = 7.0 kG, Hci = 0.50 kOe, Hc = 0.48 kOe
AC400: BHmax = 1.4 MGOe, Br = 5.5 kG, Hci = 0.72 kOe, Hc = 0.68 kOe
AC500: BHmax = 5.5 MGOe, Br = 12.7 kG, Hci = 0.64 kOe, Hc = 0.64 kOe
AC570: BHmax = 7.5 MGOe, Br = 13.5 kG, Hci = 0.74 kOe, Hc = 0.73 kOe
AS200: BHmax = 1.5 MGOe, Br = 7.0 kG, Hci = 0.57 kOe, Hc = 0.56 kOe
AS500: BHmax = 3.9 MGOe, Br = 10.8 kG, Hci = 0.62 kOe, Hc = 0.62 kOe

Conclusion: The document serves as a comprehensive reference for selecting the appropriate Alnico magnet grade based on specific magnetic and physical requirements. It highlights the importance of understanding both the magnetic and physical properties to ensure optimal performance in various applications.

Catalog excerpts

Alnico Coefficient Induction Coefficient Coercivity Curie Temp Residual Induction Minimum Intrinsic Coercivity Maximum Energy Product Maximum Operating Temp Email: [email protected] Copyright 2010 © Dexter Magnetic Technologies Inc. All Rights Reserved. For Reference Only. V101

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Alnico Typical Physical Properties – Cast Curie Temperature Coefficient of Thermal Expansion Electrical Resistivity Density Rockwell C Hardness Tensile Strength Transverse Modulus of Rupture Typical Physical Properties – Sintered Curie Temperature Coefficient of Thermal Expansion Electrical Resistivity Density Rockwell C Hardness Tensile Strength Transverse Modulus of Rupture Email: [email protected] Copyright 2010 © Dexter Magnetic Technologies Inc. All Rights Reserved. For Reference Only. V101

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