Ti 6242 - AMS 4975 - AMS 4976
Description
Titanium alloy Ti6242 has high mechanical properties and especially creep resistance up to about 500°C. Its low density, high strength and good toughness also give it an advantage in moving and high temperature applications.
Stainless has a number of qualified sources in stock and a variety of diameters to suit your application needs. This product can also be custom made or cut into slugs by our service centres. Each material is delivered with its producer’s certificate of origin in order to guarantee you total transparency and complete traceability.
Main applications
Applications include turbine parts, discs and other hot-worked components in the aerospace, industrial and motor racing sectors.
Metallurgy
The grade can be produced with several VAR rejections depending on the criticality of the applications; at least one VAR remelting is mandatory for this grade. The manufacturing processes combined with the transformation processes make it possible to obtain a homogeneous near alpha microstructure. The addition of silicon improves the heat resistance of this grade. The micrograph below shows the typical structure in the annealed state:
Machinability
Forgeability/Usability
The grade can be hot forged, the beta transus is close to about 1000°C. Machining of this grade requires sufficient coolant to limit heating.
Heat treatments
From an annealed condition, quenching followed by ageing (STA) heat treatment is possible on this grade. For a diameter of 120mm, a treatment of the type 980°C/1h/Air followed by ageing at 593°C/8h/Air will enable a level of mechanical strength of the order of 980 MPa to be obtained at room temperature and the hot strength at 480°C will be close to 700 MPa with an elongation generally higher than 12%.
Corrosion resistance
The grade is highly resistant to general corrosion and also to pitting. Chlorinated solvents should be avoided. Titanium is also susceptible to hydrogen embrittlement, so it is important to limit any hydrogen input during the processing.
Standard Sizes
3m round bars in STA or annealed condition – Surface ground or peeled
Other formats (please consult us)