Alloy K500，Monel K500 Plate，UNS N05500，EFORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA18，American Specs:AMS 4676 Bar and Forgings QQ-N-286，German Specs:WS 2.4375

### **Alloy K-500 / Monel K-500 Plate / UNS N05500 – Age-Hardenable Nickel-Copper Alloy Plate** **Product Overview** Monel K-500 Plate (UNS N05500) is a precipitation-hardenable nickel-copper alloy plate that delivers the outstanding corrosion resistance of Monel 400 with significantly higher strength and hardness achieved through a specialized age-hardening thermal treatment. The plate product form is engineered for structural components, pressure vessels, tanks, and wear surfaces requiring a unique combination of high mechanical strength, excellent corrosion resistance, and good fabricability in aggressive environments. --- **Chemical Composition (ASTM B865)** | Element | Content (%) | |----------------|----------------| | **Nickel (Ni)** | 63.0 min (Balance) | | **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 | | **Carbon (C)** | 0.25 max | | **Silicon (Si)** | 0.5 max | | **Sulfur (S)** | 0.01 max | *Strengthening is achieved through precipitation of Ni₃(Ti,Al) intermetallic phases during aging.* --- **Physical Properties** | Property | Value | |-------------------------------|---------------------------------| | **Density** | 8.44 g/cm³ (0.305 lb/in³) | | **Melting Range** | 1315–1350°C (2400–2460°F) | | **Electrical Resistivity** | ~65.0 μΩ·cm (Annealed) | | **Thermal Conductivity** | ~17.0 W/m·K (at 100°C) | | **Thermal Expansion Coefficient** | 13.9 μm/m·°C (20–100°C) | | **Modulus of Elasticity** | 179 GPa (26,000 ksi) | | **Magnetic Permeability** | <1.005 (Essentially non-magnetic) | --- **Mechanical Properties (Plate – Aged Condition)** *Typical Aging Treatment: 1100°F (593°C) for 16 hours, furnace cool* | Property | Hot-Rolled Plate (ASTM B865) | |-----------------------------|------------------------------| | **Tensile Strength** | 930–1130 MPa (135–164 ksi) | | **Yield Strength (0.2% Offset)** | 620–895 MPa (90–130 ksi) | | **Elongation in 2"** | 22–32% | | **Hardness** | 24–33 HRC | | **Impact Toughness (Charpy V-Notch)** | Typically 40–70 J at 21°C | --- **Available Plate Forms & Sizes** **Product Forms** - Hot-rolled plate - Annealed and pickled plate - Age-hardened plate - Checkered (non-slip) plate (special order) **Standard Sizes** - **Thickness**: 5 mm to 150 mm (0.1875" to 6") - **Width**: Up to 1500 mm (60") - **Length**: Up to 6000 mm (240") **Surface Finish** - Hot-rolled, annealed, and pickled - Mechanically descaled - Grinding and polishing available (special order) --- **Key Characteristics & Advantages** 1. **High Strength & Hardness** – Achieves significant strength increase through aging treatment while maintaining good ductility. 2. **Excellent Corrosion Resistance** – Resists seawater, sulfuric and hydrofluoric acids, alkalis, and many other corrosive media. 3. **Good Fabricability** – Can be sheared, punched, machined, and welded using standard methods. 4. **Low Magnetic Permeability** – Suitable for non-magnetic applications. 5. **Erosion & Cavitation Resistance** – Ideal for pump components, propeller blades, and marine wear plates. 6. **Stress-Corrosion Cracking Resistance** – Good performance in chloride-containing environments. --- **Product Applications** **Marine & Offshore** - Shipbuilding structural parts - Propeller blades and marine propulsion components - Seawater pump casings and impellers - Offshore platform components **Chemical & Process Industries** - Reactor vessels and pressure vessels - Tank linings and baffles - Heat exchanger supports and baffles - Mixing vessel components **Oil & Gas** - Valve bodies and components - Wellhead equipment parts - Fasteners and bolting - Drill string components **Aerospace & Defense** - Structural airframe components - Engine mounts and fittings - Missile and radar system parts **General Engineering** - High-strength fasteners - Spring components - Non-magnetic instrumentation plates --- **International Standards** | Standard Type | Standard Number | Title / Scope | |---------------|----------------------|-------------------------------------------| | **UNS** | **N05500** | Unified Numbering System | | **ASTM** | B865 | Precipitation-Hardening Nickel-Copper-Aluminum-Titanium Alloy Plate, Sheet, and Strip | | **ASME** | SB865 | Boiler and Pressure Vessel Code – Plate | | **AMS** | 4676 | Bars, Forgings, and Rings (also referenced for plate applications) | | **DIN** | 2.4375 | Nickel-Copper-Aluminum Alloy (NiCu30Al) | | **EN** | NiCu30Al | European Standard Designation | --- **Heat Treatment Specifications** - **Solution Annealing**: 1600–1650°F (870–900°C), rapid cool - **Aging Treatment**: 1100–1150°F (595–620°C) for 12–16 hours, furnace cool - **Stress Relieving**: 1000–1100°F (540–595°C) for 1–2 hours, air cool --- **Fabrication Notes** **Machining** - Best machined in the annealed condition; age-harden after machining. - Use positive rake angles, sharp tools, and rigid setups. **Welding** - Use Monel 60 or 67 filler metals. - Post-weld aging is required to restore mechanical properties in the heat-affected zone. **Forming** - Good cold-forming characteristics in the annealed condition. - Hot forming should be performed between 1600–2100°F (870–1150°C). --- **Quality Assurance** All Monel K-500 plate is supplied with full traceability and certification, including: - Mill Test Certificate (MTC) per EN 10204 3.1 or ASTM requirements - Chemical analysis report - Mechanical test report - Heat treatment certificate - Ultrasonic testing (UT) available upon request --- **Conclusion** Monel K-500 Plate (UNS N05500) offers an exceptional balance of high strength, excellent corrosion resistance, and good fabrication properties. Its age-hardening capability allows designers to specify a material that performs reliably in demanding structural and corrosive environments across marine, chemical, oil and gas, and aerospace industries. The plate form provides versatility for manufacturing large components where strength, durability, and corrosion resistance are critical.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1707 gallon liquid totes Special package is available on request.