AMS 5628 - 431 Stainless Steel Specification
AMS 5628 is the aerospace specification for 431 Stainless Steel, a martensitic stainless steel alloy known for its outstanding corrosion resistance among martensitic stainless steels. The specification covers bars, wire, forgings, and tubing, and is particularly suited for those applications where strength, toughness, and corrosion resistance are of primary importance.
Applications of AMS 5628
AMS 5628 431 Stainless Steel is widely used in aerospace, marine, and high-strength industrial components, including:
- Aircraft fasteners and fittings
- Structural members exposed to marine or corrosive atmospheres
- High-strength shafts, valves, and bolting
- Turbine components and mechanical couplings
What is 431 Stainless Steel ?
431 Stainless Steel is a high-strength martensitic steel with the highest corrosion resistance of all martensitic stainless steel grades. It is intended for extreme structural and marine applications, with high toughness, high tensile strength, and moderate corrosion resistance, making it the top choice for use in aircraft and high-performance industrial products.
431 STAINLESS STEEL SPECIFICATIONS
Bars & Forgins
High-quality bars and forgings suitable for structural, machined, and high-stress components.
Certified Material for Critical Service
Fighter Jet Metals provides 431 Stainless Steel that meets AMS, MIL, and DMS requirements with full mill certifications, heat lot traceability, and mechanical testing. Material is supplied in bar, plate, and forging forms for aerospace, marine, and defense-grade manufacturing.