AMS 4914/UNS R58153/Timetal 15-3/15-3-3-3 Titanium Alloy

Ti-15V-3Cr-3Al-3Sn（UNS R58153） is an age hardenable, metastable-beta alloy primarily used where cold formability and high strength are desired.   Ti 15-3-3-3(UNS R58153) is usually acceptable for use at temperatures up to 550°F (288°C).



Being strip producible, Ti-15-3-3-3(UNS R58153) shows cost advantages when compared with the established alpha-beta alloys that must be hot rolled on hand mills. Whereas alpha-beta alloys also require hot forming in most situations, Ti-15-3-3-3 can be cold formed to quite intricate shapes with improved structural efficiency.



Moreover, the alloy is weldable, ageable to high strength, and relatively insensitive to environments such as saltwater. Ti-15-3-3-3(UNS R58153) exhibits comparatively low directionality and its annealed properties are rather insensitive to process variations.



The alloy is available from Lork Group in sheet, strip/foil and titanium rod but can also be obtained in tube/pipe, fittings, and castings.



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.

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. It is strip-producible and highly cold formable.

Rated as"good"in terms of weldability.

Solution treat at 788-816 C(1450-1500 F), 3-30 minutes followed by air cooling.

Rough forge at 982-1093 C( 1800-2000 F), finish at 816-927 C(1500-1700 F).

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

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.

Stress relieve at 538-649 C(1000-1200 F). For full solution annealing, soak at 1450 F and air cool.

Age at 538 C(1000 F) for 8 hours, air cool.

Beta Transus (F +/- 25) 1400