Wrought Aluminium Alloy & Cast Aluminum Alloy

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Wrought Aluminium Alloy & Cast Aluminum Alloy

What is wrought aluminum alloy

What is wrought aluminum alloy?

Wrought aluminum alloy is an aluminum alloy whose structure and shape are changed by stamping, bending, rolling, extrusion and other machining processes. The ingot is made by melting method, and then undergoes metal plastic deformation processing to make various forms of aluminum alloy. There are aluminum alloys that can be strengthened by heat treatment: including hard aluminum alloys, superhard aluminum alloys, and forged aluminum alloys; there are also aluminum alloys that cannot be strengthened by heat treatment. Mainly various anti-rust aluminum alloys. It is widely used in aviation, automobile, shipbuilding, construction, chemical industry, machinery and other industrial sectors.

Wrought aluminum alloy grade table:

LF4AIMg4.5         Mn0.75038A5038AIMg4.5         MnN85083

What is cast aluminum alloy?

What is cast aluminum alloy?

Cast aluminum alloy is an aluminum alloy that is filled with molten metal to obtain blanks of parts of various shapes. It has the advantages of low density, high specific strength, good corrosion resistance and casting process, and is less restricted by the structural design of parts. Divided into Al-Si and Al-Si-Mg-Cu-based medium-strength alloys; Al-Cu-based high-strength alloys; Al-Mg-based corrosion-resistant alloys; Al-Re-based heat-strength alloys. Most of them require heat treatment to achieve the purpose of strengthening the alloy, eliminating the internal stress of the casting, stabilizing the structure and the size of the part. It is used to manufacture beams, gas turbine blades, pump bodies, pylons, hubs, air intake lips and engine casings, etc. It is also used to make parts such as cylinder heads, gearboxes and pistons of automobiles, housings of instruments and meters, and booster pump bodies.

What is the difference between cast and wrought aluminum alloys?

Cast aluminum alloys are made by melting aluminum and then pouring it into a mold. This process is called casting. Wrought aluminum alloys are made by melting the metal and then shaping it while it is still hot. This process is called rolling or drawing.

The major difference between cast and wrought aluminum alloys is that cast alloys are melted in a furnace, poured into a mold, and cooled to form their shape. Wrought alloys are heated to their melting point, shaped while still hot, then cooled to form their shape.

Cast Aluminum: -Cheaper -Higher Yield Strength -More Durable

Wrought Aluminum: -More Expensive -Lower Yield Strength -Less Durable


1. Cast and wrought aluminum alloys are both alloys of aluminum, but they have different compositions. Cast alloys have a low silicon content while wrought alloys have a high silicon content.

2. Cast aluminum is cheaper to produce than wrought because it can be made in large quantities at once in a foundry. Wrought aluminum is more expensive because it must be heated and shaped by hand.

3. Cast has better corrosion resistance than wrought because the silicon in the alloy reacts with oxygen to form a protective layer of silicon dioxide on the surface of the metal. This means that cast aluminum can be used for outdoor structures like building roofs, but not for indoor items like furniture which might get wet from time to time.

Author: Mose Li

Author: Mose Li

Director of Project Engineering at 3Q Machining

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