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Titanium 15-3-3-3 (UNSR58153)


The following specifications cover Titanium 15-3-3-3

  • AMS 4914
  • UNS R58153

Property Results

Related Metals:

  • Timetal(r) 15-3
  • Ti 15-3
  • Timetal(r) 15-3(tm)


Chemistry Data : 

Aluminum 2.5 – 3.5
Carbon 0.05 max
Chromium 2.5 – 3.5
Hydrogen 2 0.015 max
Iron 0.25 max
Nitrogen 0.05 max
Oxygen 0.13 max
Remainder Each 0.1 max
Remainder Total 0.4 max
Tin 2.5 – 3.5
Titanium Balance
Vanadium 14 – 16

Principal Design Features 15-3-3-3 is an age hardenable, metastable-beta alloy used primarily in sheet metal applications due to its excellent strength and cold formability characteristics. It is available from mill producers but is not solidly supported by any of the known national distributors. Beta Transus (F +/- 25) 1400.

Applications This alloy is currently used primarily for airframe applications although it has also been considered for a variety of aerospace fasteners, tubing and tankage components.

Machinability 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. 

Forming 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.

Welding Rated as “good” in terms of weldability.

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

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

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

Cold Working 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.

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

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

Other Physical Props Beta Transus (F +/- 25) 1400

Physical Data :

Density (lb / cu. in.) 0.172
Modulus of Elasticity Tension 13.5

Mechanical Data : 

Form Sheet
Condition Solution Annealed & Aged
Temper 70
Tensile Strength 145
Yield Strength 140
Elongation 7

*South Coast Industrial Metals only provides precision thin foils, sheet and strip in this grade*