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What is the difference between magnesium alloy and aluminum alloy?
Feb 02, 2018

Aluminum alloy and magnesium alloy are two kinds of metal raw materials which are widely used in modern industry. However, the two are different in performance and other aspects. What is the difference between aluminum alloy and magnesium alloy? The following analysis for you, hoping to help more people on these two different metal materials have a more in-depth understanding.

1, different tensile strength:

Magnesium alloy frame made of the same volume of strength than aluminum alloy, to achieve the strength of the frame will increase the thickness of the material and the tube, so from the perspective of weight compared with aluminum alloy magnesium has no advantage, and aluminum alloy resistance Tensile strength greater.

2, different fatigue strength:

The same volume of magnesium alloy frame made of durable durability than aluminum alloy frame, magnesium alloy is also a fatal disadvantage. As the number of rides is increased, the higher the number of stress occurs, the strength will be significantly reduced, and even the frame life of no more than 2-3 years, so professional riders rarely use magnesium alloy frame, if used in competitions, Also calculate the mileage abandoned by the replacement of form; This shows that the fatigue strength of aluminum alloy is better than the magnesium alloy material.

3, different metal oxide:

The periodic table of the elements clearly shows that magnesium alloys are more easily oxidized and corroded than aluminum alloys, resulting in the limited use of magnesium alloys.

4, different manufacturing costs:

Magnesium alloy is a lively metal, so the manufacturing equipment and environment have higher requirements, resulting in high manufacturing costs, the cost of the bicycle frame produced far less than the aluminum alloy frame.

5, different density density:

Magnesium alloy under the same volume conditions lighter than aluminum, which is the advantage of magnesium alloy.

6, different elastic modulus:

Magnesium alloy frame made of rigid material than the aluminum alloy frame, the same thickness and diameter made of the frame in the actual ride will absorb more efforts to affect riding efficiency.

In summary, although the aluminum and magnesium alloys have their own superior performance, but relatively speaking, the advantages of aluminum alloy more performance, the application is relatively extensive.