Titanium 6-2-4-2

Hold at 538-593 C(1000-1100 F) for 8 hours, air cool.

For duplex annealing, hold at 900 C(1670 F) for 1/2 hour, air cool to 788 C(1465 F) and air cool. For beta anneal, hold at 1024 C(1900 F) for 1/2 hour, air cool to 593 C(1100 F) for 8 hours and air cool.

Most commonly found in gas turbine compressor components, such as blades, discs and impellers. It is also used for sheet metal components in afterburners and "hot" airframe sections.

The cold working characteristics of this alloy are similar to those found in austenitic stainless steels. In multiple forming operations, intermediate stress relieving is recommended to offset the alloy's tendency to work harden. Post-work annealing is recommended to reattain maximum performance characteristics.

Rough forge at 1038-1066 C(1929-1980 F), finish at 954-982 C(1770-1825 F).

This alloy can be hot or cold formed and will exhibit characteristics equivalent to those found in a 1/8 to 1/4 hard austenitic stainless steel.

Beta minus 14 C(25 F).

Hot forming will reduce both the springback and required forming forces, and will increase the overall ductility of the material.

As a family, titanium and its alloys have developed a mystique as a nightmare to machine. This is simply not the case. Experienced operators have compared its characteristics to those found in 316 stainless steel. Recommended practice includes high coolant flow(to offset the material's low thermal conductivity), slow speeds and relatively high feed rates. Tooling should be tungsten carbide designations C1-C4 or cobalt type high speed tools.

Beta Transus (F +/- 25) 1820

This near alpha alloy is designed primarily for high temperature applications (up to 538 C). It combines excellent strength and corrosion resistance with relatively good weld and fabricability. Beta Transus (F +/- 25) 1820.

Rated as "fair" in terms of weldability.