AMS 4676 Alloy K-500 (Monel K-500 / UNS N05500 / 2.4375) is a precipitation-hardened nickel-copper alloy with 965 MPa tensile strength and excellent corrosion resistance in seawater and HF acid. Used for pump shafts, oil-well tools, propeller shafts, springs, and doctor blades. Available in bar, forgings, sheet, plate, pipe, and tube. ZYTC Alloy supplies certified material with full traceability.
Availability Alloy K-500 (UNS N05500) is available in Bar (Rounds, Flat), Round Bar, Flat Bar, Sheet, Strip, Plate, Rod, Wire, Forgings, Pipe and Tube. For all stock availability contact ZYTC Alloy Sales.
Fabrication Annealing: 843-871°C (1550-1600°F) × 10-30 minutes, water quench; relieves cold work stresses and restores soft condition . Aging: 566-607°C (1050-1125°F) × 16-24 hours, air cool; develops full precipitation hardening . Hot Working: 927-1177°C (1700-2150°F); reheat as necessary; avoid working below 871°C . Cold Working: Good formability in annealed condition; work-hardening rate moderate . Machining: More difficult than Alloy 400 due to higher strength; requires sharp tools, positive feeds, and adequate lubrication . Welding: Good weldability using GTAW (TIG); post-weld aging required to restore properties; matching filler metal (ERNiCu-7) recommended.
Chemical Composition | Chemical Composition (Weight %) | Alloy K-500 Specification |
|---|
| Nickel (Ni) | 63.0 - 70.0 | | Copper (Cu) | 27.0 - 33.0 | | Aluminum (Al) | 2.30 - 3.15 | | Titanium (Ti) | 0.35 - 0.85 | | Iron (Fe) | 2.0 max. | | Manganese (Mn) | 1.5 max. | | Silicon (Si) | 0.5 max. | | Carbon (C) | 0.25 max. | | Sulfur (S) | 0.010 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.44 g/cm³ | 0.305 lb/in³ | | Melting Range | 1300 - 1350°C | 2370 - 2460°F | | Modulus of Elasticity | 179 GPa | 26.0 × 10⁶ psi | | Thermal Conductivity (RT) | 17.1 W/m·K | 119 BTU·in/hr·ft²·°F | | Coefficient of Expansion (20-100°C) | 13.7 µm/m·°C | 7.6 µin/in·°F | | Electrical Resistivity | 0.613 µΩ·m | 0.613 µΩ·m | | Curie Temperature | -67°C (approx.) | -89°F (approx.) |
| Mechanical Properties (Bar) | Condition | Metric | Imperial |
|---|
| Tensile Strength (min.) | Annealed | 620 MPa | 90 ksi | | Yield Strength (0.2% offset, min.) | Annealed | 240 MPa | 35 ksi | | Elongation (min.) | Annealed | 30% | 30% | | Tensile Strength (min.) | Aged | 965 MPa | 140 ksi | | Yield Strength (0.2% offset, min.) | Aged | 690 MPa | 100 ksi | | Elongation (min.) | Aged | 20% | 20% | | Hardness (Aged) | — | 28-38 HRC | 28-38 HRC |
ApplicationsMarine: Pump shafts, propeller shafts, marine propeller shafts, seawater pump components, valve stems Oil & Gas: Downhole tools, oil-well tools, drill collars, non-magnetic drill components, MWD/LWD housings Chemical Processing: Pump shafts, valve components, agitator shafts, chemical plant hardware Medical: Surgical instruments, medical devices requiring non-magnetic properties Paper Production: Doctor blades, scrapers, paper mill equipment Springs: High-strength springs for corrosive environments Fasteners: Bolts, nuts, studs requiring high strength and corrosion resistance Aerospace: Hydraulic system components, landing gear components
Contact InformationFor inquiries on AMS 4676 Alloy K500 (UNS N05500) bars, forgings, plates, pipes, or custom components, please contact:
📧 Email: daisy@zytcsteel.com
🌐 Website: www.zytcalloys.com |
