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Magnesium AZ31B

Magnesium AZ31B is a wrought magnesium alloy regarded as having good room-temperature properties such as strength, ductility, resistance to corrosion, and welding capacity. Because of its light weight and high strength, it is used in engineering automotive applications such as engine blocks and chassis components. This alloy is also distinguished for better vibration damping capacities than the aluminum alloys of its class.

Material Type

Magnesium Alloy that can be processed through Mechanical Fabrication first and then made into parts.

Alternative Names

AZ31B.

Process Compatibility

This alloy is very ductile and weldable making it suitable for welding and other processes such as extrusion and rolling.

Magnesium AZ31B
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Jason xue

Kingsun's senior machining engineer

Magnesium AZ31B Properties

Magnesium AZ31B is a common magnesium alloy which has low weight and tolerable mechanical properties. It has the perfect ratio of weight to strength as well as good abrasion resistant properties and sufficient ductility to be used in many areas including aviation and automobile and many others where it is of utmost importance to conserve weight.
1

Mechanical Properties

  • Tensile Strength: 260 MPa
  • Yield Strength: 200 MPa
  • Compressive Yield Strength: 97 MPa
  • Ultimate Bearing Stress Level: 385 MPa
  • Shear Strength: 130 MPa
  • Elastic Modulus: 44.8 GPa
  • Hardness, Brinell: 49
2

Physical Properties

Density, 1.77 g/cm³.

3

Thermal Properties

  • Thermal Expansion Coefficient: 26 µm/m°C
  • Thermal Conductivity: 96 W/mK
4

Electrical Properties

Not specifically enumerated, but medium electrical conductivity is typical of magnesium alloys.

5

Post Treatments

  • Stress relieving at 149°C. 30-60 minutes
  • Full annealing at 344°C, this is followed by air cooling.
6

Common Applications

  • Use in the Aerospace
  • Use in Common Commercial Sectors

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Frequently Asked Questions (FAQs)

Q: What is magnesium AZ31B and its important properties?

A: Magnesium AZ31B is a wrought magnesium alloy appreciated for its high strength-ductility-weight properties. It was used primarily as an aluminum and zinc containing wrought magnesium alloy with good weight to strength ratio and good corrosion resistance. This alloy finds application in wide variety of fields such as aerospace, automotive, and other industries as there is a constant push for weight savings.

Q: What are the mechanical properties of magnesium AZ31B?

A: Structural mechanical properties of magnesium AZ31B are remarkable including high tensile strength, relative ductility and good workability. Their values are in the ranges of tensile strength (260-290 MPa), yield strength (200-220 MPa), and elongation (10-15%). Besides good mechanical properties, the alloy has shown good fatigue properties as well as dimensional stability thereby rendering it fit for diverse structural applications.

Q: What is the chemical composition of AZ31B and why is it important for its physical properties?

A: The features the AZ31B magnesium alloy provide mean that its chemical composition contains about 3% aluminum, 1% zinc and approximately 1% manganese. This composition makes the metal stronger, more resistant to rotting in water and less brittle that is weldable to the basic magnesium. The aluminium increases strength whilst hardness increases along with the zinc content, enhancing the performance of the alloy and clamping up corrosion attack, according to the supplier’s specification.

Q: What thermal properties does magnesium AZ31B possess, and how do they compare to those of tech steel?

A: Actually, optimizing the density which is about 1.77 g/cm³ and all thermal properties of Magnesium AZ31B is very commendable since its melting point temperature is around 630°C (1166°F). In terms of thermal conductivity, the material’s value is about 96 W/m·K, which is higher than many of the steel alloys but lower than pure aluminum, reflecting its unique physical properties. These properties enable it to be used in places where good heat dissipation and light components are needed to manage the thermal load.

Q: What is peculiar about AZ31B-H24 as compared to other tempers of the alloy?

A: A part of the magnesium alloy AZ31B is partially annealed to remove the external organic layers and it is called AZ31BH24. behind this temper a fair compromise is reached as to the amount of the strength and ductility. As opposed to other tempers, such as H26, heat treated AZ31B-H24 has somewhat decreased strength properties but benefits formability. Therefore, this heat-treated part will probably be used where a good combination of strength and workability is required, i.e., in applications that request a quote for high performance. aircrafts fuselage components or car parts.

Q: Which fabrication methods can be applied in machining Magnesium AZ31B?

A: The Magnesium AZ31B can be molded through varied methods which include extrusion, rolling, forging, and machining. It can be effectively welded by using procedures such as magnesium tig and aluminum mig because of its good weldability. The alloy can be shaped through processes such asin stamping and bending. Though, magnesium is blazingly explosive in powder form. This hazard needs to be controlled during ND LMA fabricating processes, especially water oxide burst, to ensure the integrity of the high strength material.

Q: What properties does magnesium AZ31B presents when compared to aluminum alloys for instance?

A: In contrast with other magnesium alloys, magnesium AZ31B has a low density of around 2/3 which is reasonably good saving in terms of weight. It has the highest strength to weight ratios and superior vibrations damping characteristics, making it an ideal choice for high strength applications. Generally, it is reasonable to note that alloyed aluminum has more absolute strength as well as better resistance to corrosion. Since the end consideration is based on the application of AZ31B vs. Aluminum, it can be concluded that AZ31B should be chosen for those applications where minimum weight is undesirable due to its superior physical properties.

Q: In what industries is magnesium AZ31B typically employed and for what reasons?

A: Applications of magnesium AZ31B include aircraft and aerospace components, body panels and structural parts in cars and buses, and device cases due to its low density and high strength mechanical properties. It is used in numerous applications including sporting goods, where it is present in light tooling and concrete tools. High strength-to-weight ratio makes it popular in applications where stiff structures, but lightweight are needed.

Q: What considerations ought to be taken into account when welding magnesium AZ31B to meet the supplier's specifications?

A: Answer: Apart from these, there are other considerations which should be kept in mind while welding magnesium AZ31B. For one, it is essential to ensure effective shielding arc (generally of argon gas) against air contamination. A few gases prevent oxidation; therefore, one should make sure that the above region is covered in an inert gas to maintain the integrity of the high strength weld. In some cases, it may be possible that preheating is required within thicker sections. Moreover, there are filler materials that are used as well, for example, AZ61A and AZ92A in the case of AZ31B welding, which can affect the overall strain characteristics. Heat input must be controlled because if it is too high, Alexander may bend thanks to heat.The magnesium should be cleaned in gas such as an acetone or methanol since it is quite hazardous; that is why it should not require excessive heat.

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