PH 13-8 Mo is a precipitation hardening martensitic stainless steel designed for applications requiring high strength, good toughness, and corrosion resistance.
With an Al-Mo strengthening system and vacuum melting process, this alloy provides consistent performance and high material purity, making it suitable for aerospace, medical, and high-reliability engineering applications.
High Strength Performance
Yield strength up to 1480 MPa in aged condition
Good Toughness at Low Temperature
Maintains impact resistance at cryogenic conditions
Corrosion Resistance
Suitable for chloride-containing environments
Stable Properties Across Temperature Range
Performs from sub-zero to moderate elevated temperatures
Low Magnetic Permeability
Suitable for sensitive equipment applications
AMS 5629 (Bars & Forgings)
AMS 5630 (Sheets & Plates)
ASTM F899 (Medical Applications Reference)
Solution Treatment
~927°C (1700°F), air cooling
Optional Cryogenic Treatment
~ -73°C (-100°F)
Aging Conditions
Good performance in salt spray environments
Better resistance to stress corrosion cracking compared to standard PH steels
Suitable for marine and chloride environments
Machining
Recommended tools: carbide / CBN
Use proper cooling to extend tool life
Welding
Weldable with proper procedure
Post-weld heat treatment recommended
Preheating may be required for high restraint conditions
Aerospace structural components
High-strength shafts and fasteners
Medical equipment components
Marine hardware
Precision mechanical parts
Forms: Bars, Forgings, Plates
Heat treatment: H950 / H1000 / H1150
Certification: MTC (EN 10204 3.1 available)
Third-party inspection supported
Custom sizes and small trial orders accepted
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The information provided is based on publicly available technical data and is for reference only. Actual properties may vary depending on processing and heat treatment.