PH13-8Mo is a vacuum-melted (VIM+VAR/ESR) martensitic precipitation-hardening stainless steel offering an exceptional combination of high strength (up to 220 ksi tensile), excellent toughness, good corrosion resistance, and transverse property uniformity. With low carbon content and tight composition control, this alloy achieves superior toughness in all directions while maintaining corrosion resistance similar to 304 stainless in fully hardened conditions. It is the preferred material for aircraft landing gear, missile components, nuclear hardware, and high-strength fasteners requiring reliability in critical applications .
1. Product Specifications & Physical DataZYTC Alloy supplies PH13-8Mo in comprehensive mill forms for aerospace, defense, and industrial applications requiring verified mechanical properties and complete material traceability. Available Forms: Sheet, plate, strip, bar (round, square, flat, hex), wire, forgings, rings, extrusions, and welding wire . Specifications: AMS 5629, AMS 5864, ASTM A564, UNS S13800 .
| Chemical Composition (Weight %) | PH13-8Mo Specification |
|---|
| Chromium (Cr) | 12.25 - 13.25 | | Nickel (Ni) | 7.50 - 8.50 | | Molybdenum (Mo) | 2.00 - 2.50 | | Aluminum (Al) | 0.90 - 1.35 | | Carbon (C) | 0.05 max. | | Manganese (Mn) | 0.10 max. | | Silicon (Si) | 0.10 max. | | Nitrogen (N) | 0.01 max. | | Phosphorus (P) | 0.010 max. | | Sulfur (S) | 0.008 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 7.76 - 7.8 g/cm³ | 0.280 - 0.282 lb/in³ | | Modulus of Elasticity | 203 GPa | 29.5 × 10⁶ psi | | Poisson's Ratio | 0.28 | 0.28 | | Thermal Conductivity (RT) | 14.3 W/m·K | 99.2 BTU·in/hr·ft²·°F |
| Mechanical Properties (Minimum) | Condition | Metric | Imperial |
|---|
| Tensile Strength | H950 | 1517 MPa | 220 ksi | | Yield Strength (0.2% offset) | H950 | 1413 MPa | 205 ksi | | Elongation | H950 | 10% | 10% | | Tensile Strength | H1000 | 1413 MPa | 205 ksi | | Yield Strength (0.2% offset) | H1000 | 1310 MPa | 190 ksi | | Tensile Strength | H1050 | 1207 MPa | 175 ksi | | Yield Strength (0.2% offset) | H1050 | 1138 MPa | 165 ksi | | Tensile Strength | H1100 | 1034 MPa | 150 ksi | | Yield Strength (0.2% offset) | H1100 | 931 MPa | 135 ksi |
2. Fabrication & Material ComparisonHeat Treatment: Solution anneal at 927-954°C (1700-1750°F) followed by air cooling or faster; age hardening at temperatures from 482°C to 621°C (900-1150°F) depending on desired properties . Forming: Good formability in annealed condition; similar to other martensitic stainless steels . Machining: Best machined in solution-annealed condition; carbide tooling recommended . Welding: Good weldability with proper inert gas shielding; helium preferred. Pre-weld cleaning essential; post-weld aging required to restore properties . Material Comparison: vs. 15-5 PH: Higher toughness and strength; better transverse properties; similar corrosion resistance . vs. 17-4 PH: Superior toughness and strength; more expensive; specified for critical aerospace applications . vs. Custom 450: Higher strength capability; better toughness . vs. 304 Stainless: Comparable corrosion resistance with significantly higher strength .
3. ApplicationsAerospace: Landing gear components, engine parts, structural sections, aircraft fasteners Defense: Missile components, ordnance hardware, launch systems Nuclear: Reactor components, control rod hardware, valve parts Petrochemical: High-strength valves, fittings, downhole tools Industrial: Injection molding equipment, high-strength shafts, pins Fasteners: Screws, bolts, high-strength fasteners requiring corrosion resistance
Contact ZYTC Alloy for certified PH13-8Mo materials with complete traceability, AMS/ASTM specifications, technical datasheets, and competitive pricing on standard sizes or custom-forged components. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
