MIL-S-18732 - 431 Stainless Steel
MIL-S-18732 is a cancelled military spec for 431 stainless steel, which is also referred to as AMS-S-18732. Even though this spec is cancelled, Fighter Jet Metals can still produce this material to MIL-S-18732 specifications and offer high-quality stainless steel for aerospace applications.
Material Overview
The 431 Stainless Steel, which is included in MIL-S-18732, is a martensitic stainless steel designed for excellent corrosion resistance, which is arguably the best of all the martensitic grades. It remains magnetic in all conditions and can be hardened and tempered to high strength and toughness for components exposed to severe conditions or marine environments.
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.