BMS7-391 - Titanium 6Al-2Sn-4Zr-2Mo Premium Quality Forgings
BMS 7-391 is a Boeing company specification for Ti-6Al-2Sn-4Zr-2Mo, a titanium alloy forgings used by Boeing in its products. This specification outlines specific requirements for the composition of the alloy, the process by which the forgings are produced, the mechanical properties required in the forgings, and quality control measures, among other requirements. When the specification for the alloy forgings by BMS 7-391 refers to “premium quality” forgings, it is a reference to additional process control and inspection criteria. This is in a bid to improve the structural integrity and reliability of the forgings by limiting defects and optimizing performance under the cyclical stresses and environments encountered in aerospace applications.
Fighter Jet Metals works with Aerospace OEMs to maintain the BMS7-391 specification for 6Al-2Sn-4Zr-2Mo. If you are currently managing a project that requires BMS7-391 please reach out to us so we can assist.
Applications of BMS7-391 Titanium
Titanium forgings produced under the BMS7-391 specification are commonly used in aerospace systems that require high strength, fatigue resistance, and structural reliability.
Typical applications include:
- Aircraft Structural Components : load-bearing forged parts used in airframe assemblies
- Gas Turbine Engine Hardware : compressor and structural engine components
- High-Stress Aerospace Forgings : components exposed to cyclic loads and demanding operational conditions
Boeing Quality Requrements
BMS stands for “Boeing Material Specification” and originate from Boeing’s headquarters in Seattle, WA. For more information on BMS7-391 please refer to:
D1-4426 Approved Process Lists
As a Tier 1 Aerospace company, Boeing holds its subcontractors to the same standards by ensuring they source BMS7-391 from approved sources. This creates accountability and ensures the highest quality standards are achieved in the manufacturing process.
6Al-2Sn-4Zr-2Mo SPECIFICATIONS
BARS & FORGINGS
Semi-finished bars and forged shapes for high-strength, load-bearing aerospace components.
SHEET & PLATE
Flat products for structural and skin applications in aerospace, providing corrosion resistance and high strength.
GULFSTREAM SPECIFICATIONS
Manufacturer standards for Gulfstream aircraft components.
OTHER OEM SPECIFICATIONS FOR (6-2-4-2) Titanium
GE AVIATION
Additional GE AVIATION-specific titanium standards for aerospace applications.
PRATT & WHITNEY
Additional PRATT & WHITNEY-specific titanium standards for aerospace applications.
ADDITIONAL MILITARY SPECIFICATIONS
Military-grade titanium alloy standards for defense and aerospace use.
Certified Material for Critical Service
Aerospace programs demand strict compliance with recognized material standards and OEM aerospace specifications. Fighter Jet Metals supplies (6-2-4-2) Titanium in accordance with major AMS, MIL, Boeing, Gulfstream, and other aerospace manufacturer specifications.
All material is delivered with complete mill test reports, heat-lot traceability, and full documentation, ensuring compliance with the quality requirements of aerospace, defense, and other critical engineering applications.