AMS 4978 - 6Al-6V-2Sn Titanium Alloy Bars and Billets (STA)
AMS 4978 is the specification for 6Al-6V-2Sn Titanium Alloy bars and billets in the solution treated and aged (STA) condition. The STA condition develops maximum tensile strength in the 6Al-6V-2Sn alloy, typically achieving strength levels significantly higher than 6Al-4V STA, making it the correct choice for the most highly stressed aerospace structural applications.
STA bars and billets per AMS 4978 are used in high-strength airframe fittings, primary structure attachment hardware, and precision-machined components on military aircraft and missiles where 6Al-4V cannot meet the design strength requirements.
6Al-6V-2Sn titanium alloy offers higher strength than 6Al-4V in the solution treated and aged condition, making it the preferred choice for the most highly stressed aerospace structural applications where standard 6Al-4V STA cannot meet design requirements.
Applications of AMS 4978 6Al-6V-2Sn Titanium
- High-Strength Airframe Primary Structure
- Military Aircraft Structural Fittings
- Wing and Fuselage Attachment Hardware
- Missile Structural Components
- High-Load Precision Machined Parts
AMS Titanium Specifications
SAE AMS material specifications for 6Al-6V-2Sn titanium alloy covering bars, billets, forgings, sheet, and strip for aerospace structural and engine applications.
Boeing / McDonnell Douglas Material Specifications
Boeing and McDonnell Douglas DMS and MMS material specifications for 6Al-6V-2Sn titanium alloy for Boeing, Douglas, and St. Louis aerospace programs.
Gulfstream Material Specifications
Gulfstream Material Specifications (GMS) for 6Al-6V-2Sn titanium alloy for Gulfstream business jet aerospace structural programs.
Certified Material for Critical Service
Materials supplied in 6Al-4V titanium must meet strict aerospace certification and traceability requirements. Fighter Jet Metals supports sourcing across a wide range of AMS, MIL, and OEM specifications, ensuring compliance with industry standards.
All material is supplied with full mill certifications, complete heat-lot traceability, and detailed documentation. This ensures reliability and suitability for safety-critical aerospace, defense, and high-performance engineering applications.