Alloys: Ti 6Al-4VAlloys of titanium are generally classified…

Alloys: Ti 6Al-4V

Alloys of titanium are generally classified into four main categories: alpha alloys; near-alpha alloys; alpha and beta alloys; and beta and near beta alloys. Of the alpha and beta alloys, Ti 6Al-4V (also known as Ti 6-4, Grade 5 titanium, or UNS R56400) is one of the most common and well known, if not the most common alpha-beta titanium alloy.

The alloy’s name derives from its composition, with a base of titanium, 6% aluminum, and 4% vanadium, as well as small amounts of iron and oxygen with traces of other elements. It is known as a medium strength alloy, but still considered to have a high strength-to-weight ratio. It is fairly easy to weld, can handle high temperatures – it can be heat treated in certain sizes, and is biocompatible. 

Ti 6Al-4V is often used in aircraft parts, such as airframes and turbine engines, as well as surgical implants. Other applications include the oil and gas industry and thanks to its corrosion resistance marine applications.

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