PH15-7Mo (AISI 632) is a chromium-nickel-molybdenum-aluminum precipitation-hardening stainless steel offering higher room and elevated temperature strength than 17-7 PH due to molybdenum substitution (2% Mo replaces 2% Cr). It can be formed in the soft austenitic condition and hardened to high strength levels (up to 240 ksi tensile) through low-temperature heat treatments with minimal distortion. This alloy is widely used for aircraft structural components, honeycomb panels, springs, and diaphragms requiring high strength and moderate corrosion resistance .
1. Product Specifications & Physical DataZYTC Alloy supplies PH 15-7Mo in sheet and strip forms for aerospace and precision engineering applications requiring verified mechanical properties. Available Forms: Sheet, strip, and foil . Specifications: AMS 5520, AMS 5657, ASTM A693, UNS S15700 .
| Chemical Composition (Weight %) | PH 15-7Mo Specification |
|---|
| Chromium (Cr) | 14.0 - 16.0 | | Nickel (Ni) | 6.50 - 7.75 | | Molybdenum (Mo) | 2.0 - 3.0 | | Aluminum (Al) | 0.75 - 1.5 | | Carbon (C) | 0.09 max. | | Manganese (Mn) | 1.0 max. | | Silicon (Si) | 1.0 max. | | Phosphorus (P) | 0.04 max. | | Sulfur (S) | 0.03 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 7.68 g/cm³ | 0.277 lb/in³ | | Modulus of Elasticity | 200 GPa | 29.0 × 10⁶ psi | | Poisson's Ratio | 0.27 - 0.30 | 0.27 - 0.30 | | Thermal Conductivity (RT) | 16.4 W/m·K | 114 BTU·in/hr·ft²·°F |
| Mechanical Properties | Condition | Metric | Imperial |
|---|
| Tensile Strength (min.) | TH1050 | 1310 MPa | 190 ksi | | Yield Strength (min.) | TH1050 | 1172 MPa | 170 ksi | | Elongation | TH1050 | 5-6% | 5-6% | | Tensile Strength (min.) | RH950 | 1551 MPa | 225 ksi | | Yield Strength (min.) | RH950 | 1517 MPa | 220 ksi | | Elongation | RH950 | 3-5% | 3-5% | | Tensile Strength (min.) | CH900 | 1655 MPa | 240 ksi | | Yield Strength (min.) | CH900 | 1586 MPa | 230 ksi | | Hardness | TH1050 | 40 HRC | 40 HRC | | Hardness | RH950 | 45 HRC | 45 HRC |
2. Fabrication & Material ComparisonHeat Treatment Options: Condition A (Solution Treated): 1066°C (1950°F), rapid cool TH1050: Condition A + 566°C (1050°F) × 1.5h RH950: Condition A + refrigeration at -73°C (-100°F) × 8h + 510°C (950°F) × 1h Condition C: Hard cold rolling (50-60% reduction) CH900: Condition C + 482°C (900°F) × 1h
Forming: Excellent formability in Condition A; similar to 18-8 stainless steels . Welding: Good weldability using inert gas methods; post-weld heat treatment required to restore properties . Machining: Best machined in overaged condition; carbide tooling recommended . Material Comparison: vs. 17-7 PH: Higher strength due to molybdenum substitution; better elevated temperature properties . vs. 301 Stainless: Significantly higher strength after heat treatment; formable before hardening . vs. 15-5 PH: Semi-austenitic vs. martensitic; 15-7Mo optimized for sheet applications .
3. ApplicationsAircraft Components: Bulkheads, structural paneling, fuselage frames, welded honeycomb structures Springs: High-strength springs, retaining rings, constant-force springs Diaphragms: Pressure sensor diaphragms, regulators, instrument components Fasteners: High-strength fasteners requiring corrosion resistance Industrial: Components requiring high strength-to-weight ratio and moderate corrosion resistance
Contact ZYTC Alloy for certified PH 15-7Mo materials with complete traceability, AMS/ASTM specifications, technical datasheets, and competitive pricing on standard sheet and strip sizes. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
