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Introduction of Magnesium Materials

Magnesium Alloy AZ31B

AZ31B is a highly versatile alloy with extensive applications across a range of industries. It is highly regarded for its exceptional machinability, lightweight properties, and weldability. The alloy consists primarily of 3% aluminum and 1% zinc. It provides enhanced strength compared to pure magnesium, effective vibration damping, and exceptional resistance to corrosion. It is frequently employed in constructing aircraft fuselages, camera bodies, laptop frames, and more.

Tensile Strength, Yield (MPa)：180 - 240

Fatigue Strength (MPa)：100

Elongation at Break (%)：6 - 20

Hardness (Brinell)：50 - 70

Density (g/cm³)：1.77
Magnesium Alloy AZ91D

AZ91D is the most commonly used magnesium alloy. It is a high-purity cast alloy comprising 9% aluminum and 1% zinc. It is appreciated for its high strength, excellent castability, and good corrosion resistance. As a result, it is extensively utilized in automotive parts, electronic devices, and aerospace components.

Tensile Strength, Yield (MPa)：150 - 160

Fatigue Strength (MPa)：90

Elongation at Break (%)：3 - 7

Hardness (Brinell)：60 - 70

Density (g/cm³)：1.81
Magnesium Alloy ZK60A

Zinc is mainly added, which has good corrosion resistance and processability, and is suitable for manufacturing automobiles, aircraft, electronic devices.

Tensile Strength, Yield (MPa)：250 - 300

Fatigue Strength (MPa)：90 - 140

Elongation at Break (%)：5 - 11

Hardness (Brinell)：70 - 85

Density (g/cm³)：1.82
Magnesium Alloy ZA63

Aluminum and zinc are mainly added, which has high strength and toughness and is suitable for manufacturing automobiles, ships, aircraft and so on.

Tensile Strength, Yield (MPa)：247-348

Fatigue Strength (MPa)：113-200

Elongation at Break (%)：1 3.7- 17.8

Hardness (Brinell)：95

Density (g/cm³)：1.83–1.85
Magnesium Alloy ZE41A

Zirconium is mainly added, which has high strength and corrosion resistance, and is suitable for manufacturing high-temperature structural parts and aero-engine blades.

Tensile Strength, Yield (MPa)：135 - 200

Fatigue Strength (MPa)：70 – 100

Elongation at Break (%)：1 - 5

Hardness (Brinell)：60 – 75

Density (g/cm³)：1.83

Pros and Cons of Magnesium CNC Machining

Complex Geometries

Magnesium alloys are ideal for producing custom parts with complex geometries due to their high machinability. Multi-axis CNC machines can machine magnesium alloys from various angles, ensuring high accuracy and adherence to specifications.
Lightweight

Magnesium is one of the lightest structural metals, making it ideal for applications where weight reduction is crucial.
High Machinability

Magnesium’s superior machinability makes it easier to cut and shape using CNC machining processes. The material’s lower cutting forces help reduce the rate of tool wear, enhancing overall machining efficiency.
Good Damping Properties

Magnesium alloys are ideal for producing custom parts with complex geometries due to their high machinability. Multi-axis CNC machines can machine magnesium alloys from various angles, ensuring high accuracy and adherence to specifications.
Recyclable

Magnesium alloys are environmentally friendly and recyclable, making them ideal for sustainable manufacturing. CNC machining magnesium generates waste that can be recycled, contributing to eco-friendly production practices.
Flammability

Machining magnesium alloys generates fine chips and dust that are highly flammable, posing a significant fire risk. Fires can ignite due to excessive heat or sparks produced during the machining process.
Heat Generation

Magnesium’s poor heat conductivity causes high heat concentration in the cutting zone, leading to elevated cutting temperatures. This can reduce tool life, cause workpiece deformation, and increase tool wear.
Tool Wear:

Magnesium’s relatively soft and abrasive nature accelerates tool wear compared to other metals. This results in decreased machining efficiency and increased tool replacement costs.
Surface Deformation

Magnesium alloys are prone to burr formation and machining-induced deformation. Thus, achieving high-quality surface finishes without appropriate machining strategies and tooling selection is challenging.

Surface Finishing Options for Magnesium

Since magnesium parts are prone to machining defects and formation of burrs, it’s important to treat them with the right surface finishes. This will improve their aesthetic appeal and enhance performance and longevity. we offer an extensive range of surface finishing options tailored to your requirements, ensuring optimal protection and visual quality for your magnesium parts.

As machined：Magnesium can be left with a machined surface, which will show tool marks from machining.
Electrophoresis:This process can be used to deposit a uniform coating on magnesium, improving corrosion resistance.
Powder Coating:Powder coating is a suitable method for finishing magnesium, providing a durable, protective, and aesthetic coating.
Painting:Magnesium can be painted to enhance its appearance and provide additional corrosion resistance.
Electroless Nickel:This coating is applied to magnesium to increase wear resistance and improve corrosion protection.
Teflon Coating:Teflon coating can provide a non-stick, durable surface on magnesium.
Anodizing:Magnesium can undergo anodizing to improve its corrosion resistance, although special processes are needed compared to aluminum.
Heat Treatment：Can alter the mechanical properties of magnesium, but it may also change the surface appearance through oxidation.
Alodine：Alodine is commonly used for magnesium to improve corrosion resistance and prepare the surface for painting.
Tumbling：Tumbling can be used on magnesium to smooth and clean the surface, often resulting in a matte finish.
Polishing：Polishing can be applied to magnesium to create a smooth and shiny surface, although care must be taken due to magnesium’s reactive nature.
Sand Blasting：Sand blasting is effective for removing surface imperfections and giving magnesium a matte finish, but it requires caution to prevent oxidation.

Applications of CNC Machined Magnesium Parts

Automotive

Used in lightweight components like engine blocks and transmission cases.

Aerospace

Ideal for structural parts, reducing overall aircraft weight and improving fuel efficiency.

Electronics

Common in electronic housings and heat sinks due to excellent thermal management.

Medical Devices

Used in implants and instruments where weight reduction is crucial.

Professional quality

Military and Defense

Robotics and Automation

In robotics, magnesium parts are favored for their lightweight properties and high strength, which ensure efficient movement and enhanced durability.

No. 7,Qinghu Road,Qinghutou,Tangxia Town,Dongguan,Guangdong,China

+86 177 0405 3926
yubiao@ybhardware.com

Magnesium Alloy AZ31B

Magnesium Alloy AZ91D

Magnesium Alloy ZK60A

Magnesium Alloy ZE41A