Nickel Alloy 625 per BMS 7-428
BMS 7-428 is the spec for Nickel Alloy 625 (UNS N06625) used for hydraulic tubing rated for 5080 PSI service according to the Boeing Material Specification BMS. The spec lists critical mechanical, dimensionally, and corrosion resistance requirements for the use of Nickel 625 tubing in aerospace hydraulic systems.
Nickel 625 (UNS N06625) is a nickel-chromium-molybdenum alloy with an addition of niobium. The addition of molybdenum acts with the niobium to stiffen the alloy matrix, providing a high strength without a strengthening heat treatment. The alloy resists a wide range of corrosive environments and has a good resistance to pitting and crevice corrosion.
Boeing Quality per BMS7-428
BMS stands for “Boeing Material Specification” and originate from Boeing’s headquarters in Seattle, WA. For more information on BMS7-428 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 BMS7-428 from approved sources. This creates accountability and ensures the highest quality standards are achieved in the manufacturing process. An excerpt from Boeing’s quality website states the following:
Our commitment to steady, long-term improvement in our products and processes is the cornerstone of our business strategy. Maintaining customer satisfaction and enhancing shareholder value are mutual goals of both Boeing and its suppliers. To achieve these objectives, we must continuously work together to improve the overall efficiency and productivity of our design, manufacturing, administrative and support organizations.
Where is Inconel 625 used?
- CHEMICAL PROCESSING
- JET ENGINE COMPONENTS
- FLARE STACKS
- ENGINE EXHAUST SYSTEMS
- SUBMARINE AUXILIARY PROPULSION MOTORS
- POLLUTION CONTROL EQUIPMENT
- NUCLEAR REACTORS
Specifications
SHEET & PLATE
States the specifications of Nickel 625 sheets and plates at various thicknesses. Also, describes the requirements for corrosion resistance, heat resistance, mechanical properties, and formability for components used in the aerospace industry, flares, exhaust systems, and chemical equipment. ..
BARS & FORGINGS
Includes Nickel 625 in bar, forgings, and rings, where its chemical composition, mechanical properties, and heat treating requirements are discussed with regard to its applicability in industries such as aerospace and chemical processing where superior strengths are required.
BOEING SPECIFICATIONS
Boeing specifications regarding Nickel 625 provide an overview of the application of this material in aircraft engine construction, exhaust systems, as well as other elements used in the structure, which are utilized at high temperatures. The specifications guarantee a perfect fit with Boeing’s aerospace products.
GULSTREAM SPECIFICATIONS
Outlines the specifications of the Nickel 625 material used in the Gulfstream aircraft parts, including the required material properties in areas of the engine where high temperatures exist.
HONEYWELL SPECIFICATIONS
Covers Nickel 625 used in Honeywell aerospace and industrial applications. Focuses on heat and corrosion resistance, durability, and long-term stability in extreme environments.
SAFRAN SPECIFICATIONS
Defines Safran’s standards for Nickel 625 used in aircraft engines and high-temperature structural parts, ensuring oxidation and corrosion resistance under sustained thermal loads.
AIRBUS SPECIFICATIONS
Outlines Airbus standards for Nickel 625 in aerospace manufacturing, emphasizing mechanical strength, heat tolerance, and resistance to chemical attack in critical engine and structural components.
TUBING SPECIFICATIONS
Specifies Nickel 625 tubing for use in industrial, chemical, and aerospace environments. It details specifications related to the size, mechanical, and corrosion properties, as well as fabrication of tubes, used in heat exchangers, propulsion systems, or exhaust ducts.
Certified Material for Critical Service
All Nickel 625 supplied by Fighter Jet Metals comes with full test reports, heat numbers, and traceability in compliance with AMS standards.
We can coordinate dual certification with related standards ensuring compatibility with aerospace and high-temperature industrial applications.
Our materials can also be integrated into multi-alloy packages, providing a complete solution for high-performance manufacturing environments.