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What Is AZ91D Magnesium Alloy

AZ91D Magnesium Alloy is a widely used magnesium alloy that belongs to the AZ (aluminum-zinc) series of alloys.

AZ91D Magnesium Alloy is composed of approximately 9% aluminum (Al) and 1% zinc (Zn) as the primary alloying elements, along with small amounts of other elements such as manganese (Mn), silicon (Si), and copper (Cu). The “D” in AZ91D refers to the high purity level of the alloy.

The Characteristics Chart Of AZ91D Magnesium Alloy

Here is a table outlining the general characteristics of AZ91D magnesium alloy:

Density (g/cm³)Tensile Strength (MPa)Yield Strength (MPa)Elastic Modulus (GPa)Melting Point (°C)
Composition:9% 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 AZ91D magnesium alloy.

The Properties Of AZ91D Magnesium Alloy

AZ91D magnesium alloy offers a good balance of mechanical properties, castability, and corrosion resistance, making it suitable for various applications. Here are some key properties of AZ91D:



Like other magnesium alloys, AZ91D has a low density, about 1.8 g/cm³, which is approximately one-fourth that of steel and two-thirds that of aluminum. This makes it an attractive choice for lightweight applications, where weight reduction is a critical factor.


AZ91D exhibits moderate to high strength, providing good structural integrity in various applications. The tensile strength of AZ91D typically ranges from 240 MPa to 310 MPa, depending on the specific heat treatment and processing conditions.


AZ91D has excellent castability, meaning it can be easily cast into complex shapes using various casting methods, such as sand casting, permanent mold casting, or die casting. Its low melting point (around 535°C) facilitates the casting process.

Corrosion Resistance

AZ91D alloy has relatively good resistance to corrosion compared to pure magnesium. However, it is still susceptible to corrosion in humid or corrosive environments. Surface treatments or coatings are often applied to enhance the corrosion resistance of AZ91D components.

Damping Capacity

AZ91D exhibits good damping capacity, which means 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.


AZ91D can be machined using conventional machining processes, although its relatively low cutting forces and high thermal conductivity require specific cutting parameters and tooling considerations.

AZ91D magnesium alloy finds applications in various industries, including automotive, aerospace, electronics, and consumer goods. Common applications include automotive parts, such as transmission cases, engine blocks, and wheels, as well as components in electronic devices, sporting equipment, and lightweight structures.

It’s important to note that while AZ91D 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 casting process parameters.

Cnc Machining AZ91D Magnesium Alloy Service

Be-Cu Prototype has the equipment, capabilities and experience necessary to manufacture mission-critical components and parts from AZ91D magnesium alloy.

We can heat-treat components to optimize the physical properties based on the application. We utilize cutting-edge CNC milling equipment, including 5-axis milling, and a wide range of advanced technology software to create custom components based on your specific requirements.

As an industry ITAF and ISO9001:2015 certified machine shop, we can ensure you will receive the high-performance AZ91D magnesium alloy components you want with the mission-critical configurations you need.

Contact a China CNC Machining expert Be-Cu or submit an RFQ online and let us start machining AZ91D magnesium alloy to your specifications.

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 Magnesium
Cnc Machining Magnesium

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 AZ91D 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 AZ91D 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.