Magnesium AZ31B

Magnesium AZ31B is part of the magnesium-aluminum-zinc alloy family, which is lightweight, has excellent machinability, and has a good strength-to-weight ratio.

Get a Quote

Metal machined part with flange and internal threads

3.5312
M11311

260 MPa

Tensile Strength
200 MPa

Yield Strength(strain 0.200%)
97 MPa

Compressive Yield Strength(at 0.2% offset)
385 MPa

Ultimate Bearing Strength

At a Glance

Material Type
Metal
Material Name
Magnesium AZ31B
Alternative Names
3.5312 | M11311
Process Compatibility
CNC Milling, CNC Turning

Properties Table of Magnesium AZ31B

Properties

Tensile Strength 260 MPa
Yield Strength(strain 0.200%) 200 MPa
Compressive Yield Strength(at 0.2% offset) 97 MPa
Ultimate Bearing Strength 385 MPa
Bearing Yield Strength 230 MPa
Shear Strength 130 MPa
Shear Modulus 17 GPa
Elastic Modulus 44.8 GPa
Poisson's Ratio 0.35
Elongation at Break(in 50 mm) 15%
Hardness, Brinel(500 kg load, 10 mm ball) 49
Charpy Impact(V-notch) 4.30 J
Physical Properties
Density 1.77 g/cm³
Physical Properties
Thermal Expansion Co-efficient(0-100°C/32-212°F) 26 μm/m°C
Thermal Conductivity 96 W/mK

Applications of Magnesium AZ31B

Aerospace components
Automotive parts
Electronics housings
Medical implants
Power tools
Sports equipment
UAV (Unmanned Aerial Vehicle) structures
Marine applications

Advantages of Magnesium AZ31B

Lightweight
High strength-to-weight ratio
Good corrosion resistance
Good machinability
Excellent dimensional stability
Good damping capacity
Electrical conductivity
Non-magnetic
Easily weldable

Raw Stock

CNC Machined

Finished Parts

Magnesium AZ31B — Machining Notes

Magnesium AZ31B in CNC M
is Magnesium AZ31B?

Magnesium AZ31B in CNC Machining

Magnesium AZ31B is part of the magnesium-aluminum-zinc alloy family, which is lightweight, has excellent machinability, and has a good strength-to-weight ratio.

This material is a unique magnesium alloy with notable properties like corrosion resistance, heat treatment, and welding. Its corrosion resistance is commendable, owing to the presence of zinc, although it requires protection in aggressive environments. Heat treatment can enhance its mechanical properties, making it less brittle and more ductile through quenching above 300°C, and increasing its ductility and toughness with annealing before quenching. Magnesium AZ31B can be welded using TIG or laser welding methods, but proper surface cleaning before soldering is important for optimal results.

AZ31B has good machinability and can be easily cut, drilled, and shaped using standard machining processes. When machining AZ31B, we use machines with high spindle speeds and low feed rates. Magnesium alloys are softer than many other metals, so higher spindle speeds can help prevent work hardening and extend tool life. Magnesium can produce flammable fine chips, and the dust can be explosive. DEK has adequate ventilation and dust collection systems in place. We ensure the machining area is well-maintained and free of potential ignition sources.

Get A Quote
What is Magnesium AZ31B?

Magnesium is about 30% lighter than aluminum and 75% lighter than steel. AZ31B is a specific alloy composed mainly of magnesium (about 96.7% by weight), 3% aluminum, and 1% zinc.

The designation “AZ31B” is derived from the chemical symbols of its components: “A” for aluminum, “Z” for zinc, and “31” representing 3% aluminum and 1% zinc, then the letter “B” specifically denotes a cold-rolled and partially annealed temper. It is also known due to its ductility, corrosion resistance, and weldability at room temperature.

Get A Quote

FAQ

Does Magnesium AZ31B rust?

No, Magnesium AZ31B does not rust like iron or steel. However, it is susceptible to corrosion. It tends to corrode in the presence of moisture, oxygen, and salt. Protective coatings or surface treatments are often applied to avoid corrosion.

Is Magnesium AZ31B expensive?

Generally, magnesium alloys, including AZ31B, can be more expensive than some other metals like aluminum or steel. However, its specific properties, such as low density and high strength-to-weight ratio, can justify its cost for certain applications.

Can you anneal Magnesium AZ31B?

Yes, Magnesium AZ31B can be annealed. Annealing is a heat treatment process that involves heating the material to a specific temperature and then allowing it to cool slowly. This process can be used to relieve stresses, improve machinability, and modify the mechanical properties of the material.