IMI 550 Titanium Alloy

Alloy name: IMI 550
Diagram No.: 484
Type of diagram: CCT
Chemical composition in weight %: 3.93% Al, 3.18% Sn, 3.97% Mo, 0.50% Si, 0.22% 0, 0.022% N, balance is Ti
Alloy group: Titanium-based alloys
Note: Treatment: Solution annealed at 900 C (1650 F) for 20 min, continuously cooled at various rates.
Reference: W.W. Cias, “Continuous Cooling Transformation Kinetics of the IMI 685 and IMI 550 Titanium Alloys,” Rp-27-72-08, Climax Molybdenum, 1 March 1973.

Transformation Diagram

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