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What Is AZ31B Magnesium Alloy

AZ31B Magnesium Alloy is a commonly used magnesium alloy that belongs to the AZ (aluminum-zinc) series of alloys.

AZ31B Magnesium Alloy is composed of approximately 3% aluminum (Al) and 1% zinc (Zn) as the primary alloying elements, along with small amounts of other elements such as manganese (Mn) and copper (Cu). The “B” in AZ31B indicates a higher purity level of the alloy.

The Characteristics Chart Of AZ31B Magnesium Alloy

Here is a table outlining the general characteristics of AZ31B magnesium alloys:

Density (g/cm³)Tensile Strength (MPa)Yield Strength (MPa)Elastic Modulus (GPa)Melting Point (°C)
Composition:3% Al, 1% Zn, balance Mg

Please note that these values are approximate and can vary depending on specific manufacturing processes, heat treatments, and testing methods.

It is important to refer to detailed technical data sheets or material specifications provided by manufacturers for precise information on the characteristics and properties of AZ31B and AZ91D magnesium alloys.

The Properties Of AZ31B Magnesium Alloy

AZ31B magnesium alloy offers a good combination of mechanical properties, castability, and corrosion resistance, making it suitable for various applications. Here are some key properties of AZ31B:



Like other magnesium alloys, AZ31B has a low density, approximately 1.78 g/cm³, which is about two-thirds that of aluminum and one-fourth that of steel. This makes it an attractive choice for lightweight applications where weight reduction is important.


AZ31B exhibits moderate strength, providing good structural integrity in various applications. The tensile strength of AZ31B typically ranges from 240 MPa to 310 MPa, depending on the specific heat treatment and processing conditions.


AZ31B has excellent castability, allowing it to be easily cast into complex shapes using various casting methods, such as sand casting, permanent mold casting, or die casting. Its relatively low melting point (around 630°C) facilitates the casting process.

Corrosion Resistance

AZ31B alloy has good resistance to corrosion, particularly in dry or low-humidity environments. However, it can be susceptible to corrosion in humid or corrosive environments. Surface treatments or coatings can be applied to enhance the corrosion resistance of AZ31B components.

Damping Capacity

AZ31B exhibits good damping capacity, meaning it can effectively absorb and dissipate vibrations and reduce noise. This property makes it suitable for applications that require vibration damping, such as in automotive components or electronic devices.


AZ31B can be machined using conventional machining processes, although its relatively low cutting forces and high thermal conductivity require specific cutting parameters and tooling considerations.

AZ31B magnesium alloy finds applications in various industries, including automotive, aerospace, electronics, and consumer goods. Common applications include automotive parts, such as body panels, chassis components, and powertrain parts, as well as components in electronic devices, sporting equipment, and lightweight structures.

It’s important to note that while AZ31B offers several advantages, it also has limitations. For example, it has lower creep resistance compared to some other magnesium alloys, and its mechanical properties can be affected by factors such as grain size, temperature, and processing conditions.

Cnc Machining AZ31B Magnesium Alloy Service

We employ a world-class BeiJing CAM system for many of our AZ31B Magnesium Alloy machining projects. This allows us to utilize different toolpath strategies for high-speed/high-volume material removal. This provides optimized cycle times, resulting in the production of higher quality AZ31B magnesium alloy cnc machining parts with improved efficiency. This software gives us the ability to realize the full potential of our equipment, which is something that many machining suppliers cannot do.

Work with the magnesium machining experts at BE-CU.COM. We work extensively with difficult-to-machine magnesium alloy. Contact us or email us at [email protected] today.

Why Choose Our Magnesium Cnc Machining Service?

  • Save time and money for your magnesium project but quality guaranteed.
  • High productivity, outstanding efficiency and high accuracy
  • A wide range of magnesium grades and alloy materials can be machined
  • Custom complex magnesium machined parts and components at specific tolerances
  • High speed machining for prototyping and low to high volume production runs
Cnc Machining AZ31B Magnesium Alloy
Cnc Machining AZ31B Magnesium Alloy

Certifications & Quality Machining

  • ISO 9001:2015 certified
  • Fully compliant with the exacting requirements of our customers
  • Compliance in DFARS materials sourcing requirements
  • Strict compliance with PPAP and Process
  • FMEA for automotive customers
  • Skilled in KanBan and CMM Inspection and inventory management systems
  • ITAF 16949 certified

Top China AZ31B Magnesium Alloy Cnc Machining Parts

Our precision CNC machining capabilities include in-house, full-service manufacturing for all magnesium alloy components.Years of magnesium alloy machining experience have provided Be-Cu prototype with the expertise needed for high-performance magnesium alloy machined parts. Some magnesium alloy components we have manufactured include:

Online Cooperate With AZ31B Magnesium Alloy Machining Company

Be-cu works with customers all over the world to bring customers ideas to life with the highest quality precision engineered magnesium alloy components on the planet. We have both precision 5 axis machining and molds making capabilities that include both conventional and modernized production line. If you are looking for a partnership to help you apply new tools and technologies, or help you fully realize your design vision, let us help you move your business forward, contact our team ([email protected])or quote online today to get the conversation started.