Common Name
Ti-7Al-4Mo HA 146
Ti-7-4 C-135A Mo
General Information
Ti-7Al-4Mo bar and forgings are primarily used for jet engine discs, compressor blades, and spacers. This alpha-beta alloy is available in bar, billet, and extrusions.
Common Specification
Specification Product Form
AMS 4970 Bar and forgings
MIL-T-9047 Bar and Stock, Reforged
MIL-T-81556 Extrusions
MIL-T-83142 Forgings
Chemistry Requirements
N C H Fe O Al Mo Y Residuals Each Max. Residuals Max Total Ti
0.05 0.1 0.013 0.3 0.2 6.5-7.3 3.5-4.5 0.005 0.1 0.4 Balance
Minimum Tensile Properties
Condition UTS ksi (Mpa) >0.2%YS ksi (MPA) % El. % RA* Size
STA Forgings 170 (1172) 160(1103) 8 15 <1”

% Maximum unless given as a range.

Typical Tensile Properties
Condition UTS ksi (Mpa) >0.2%YS ksi (MPA) % El. % RA* Size
Forged Annealed 145(1000) 135(931) 10 20 <1”

Note: Typical properties are not to be utilized as a requirement, but are only listed for guidance. These properties may or may not be attainable in all circumstances.
* %Ra not required by all specifications

Trademark Notice: Some names are trade names and/or trademarks of specific manufacturers. Titan Singapore is not affiliated with any manufacturer(s). Orders will be filled to meet specifications from any available source(s). Names are listed solely for reference to help identify products consistent with listed specifications.


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