Technical Informations for 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.
Fighter Jet Metals offers 431 Stainless Steel for extreme environments where high hardness and corrosion resistance are required. The steel maintains its strength after heat treating and remains magnetic in all states.
Applications for 431 Stainless Steel
- Aircraft fasteners and fittings
- Structural members exposed to marine atmospheres
- High-strength shafts and pump components
- Valve parts and bolts
- Turbine hardware and mechanical couplings
Key Properties
- Type: Martensitic Stainless Steel
- Tensile Strength: Up to 200 ksi (1379 MPa) after heat treatment
- Corrosion Resistance: Superior among martensitic grades
- Hardness Range: 28–45 HRC depending on tempering
- Magnetic: Yes, in all conditions
- Heat Treatment: Air or oil quenched followed by tempering
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.