BMS 7-421 - 6Al-4V Titanium Alloy Sheet (Boeing)
BMS 7-421 is the Boeing Material Specification for 6Al-4V titanium alloy sheet in the solution treated and aged condition, providing elevated strength for high-stress structural skin applications on Boeing aircraft.
6Al-4V is the most widely specified titanium alloy in Boeing’s material system. The BMS 7-xxx series covers all standard product forms of 6Al-4V titanium, each qualified to Boeing’s supplier approval, NDT, and mechanical test requirements in addition to the base AMS chemistry and property requirements.
6Al-4V is recommended for use at temperatures from -350° to 750°F (-210° to 400°C). Applications outside this temperature range are possible in certain situations. The alloy is weldable. Complex shapes can be made via hot forming. It machines like an austenitic stainless steel.
Applications of BMS 7-421 6Al-4V Titanium
- Aircraft Turbine Engine Components
- Aircraft Structural Components
- Aerospace Fasteners
- Formula 1 Parts
- Medical Devices
- Marine Applications
- Ship Propellers
Boeing / Douglas
Boeing (BMS) and Douglas (DMS) material specifications for 6Al-4V titanium used in Boeing and McDonnell Douglas aerospace 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.