Alloy K500，Monel K500 Rod，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 Rod / UNS N05500 - Age-Hardenable Nickel-Copper Alloy Rod** **Product Overview** Monel K-500 Rod (UNS N05500) is a premium precipitation-hardenable nickel-copper alloy rod that delivers the exceptional corrosion resistance of Monel 400 with significantly enhanced mechanical properties. Through a specialized age-hardening thermal treatment, this alloy achieves superior strength, hardness, and fatigue resistance while maintaining excellent ductility and toughness. The rod form is specifically engineered for machining into critical components requiring high strength and outstanding corrosion performance in demanding environments. **Chemical Composition (ASTM B164)** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 63.0 min | | **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 | *The age-hardening mechanism occurs through precipitation of Ni₃(Ti,Al) intermetallic compounds during thermal treatment.* **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) | | **Magnetic Permeability** | <1.005 (Essentially non-magnetic) | **Mechanical Properties (Rod - Aged Condition)** *Standard Aging Treatment: 1100°F (593°C) for 16 hours, furnace cool* | Property | Hot-Finished Rod | Cold-Drawn Rod | |----------|------------------|----------------| | **Tensile Strength** | 965-1170 MPa (140-170 ksi) | 1035-1240 MPa (150-180 ksi) | | **Yield Strength (0.2% Offset)** | 655-965 MPa (95-140 ksi) | 860-1105 MPa (125-160 ksi) | | **Elongation** | 20-30% | 15-25% | | **Reduction of Area** | 35-50% | 30-45% | | **Hardness** | 25-35 HRC | 28-38 HRC | **Key Characteristics** - **Superior Corrosion Resistance**: Excellent resistance to seawater, sulfuric acid, hydrofluoric acid, and alkaline solutions - **High Strength-to-Weight Ratio**: Enhanced mechanical properties through age-hardening treatment - **Excellent Fatigue Strength**: Superior performance in cyclic loading applications - **Low Magnetic Permeability**: Maintains non-magnetic characteristics even after aging - **Good Machinability**: Can be readily machined in annealed condition (approximately 20% of free-cutting brass) **Product Applications** Monel K-500 rod is specified for critical components across multiple industries: **Marine & Offshore** - Propeller shafts and pump shafts - Marine fasteners and valve stems - Boat shafting and seawater system components - Marine engine components **Oil & Gas** - Drill collars and tool joints - Downhole instrumentation housings - Valve trims and pump components - Wellhead components for sour service **Aerospace & Defense** - High-strength fasteners and bolts - Actuator components and landing gear parts - Missile components and radar systems **Industrial Equipment** - Chemical processing pump shafts - Mixer shafts and agitators - Spring components and fasteners - Paper manufacturing equipment **International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | **N05500** | Unified Numbering System | | **ASTM** | B164 | Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire | | **ASTM** | B865 | Standard for Precipitation Hardening Nickel-Copper-Aluminum-Titanium Alloy Bar, Rod, Wire | | **AMS** | 4676 | Aerospace Material Specification - Bars, Forgings, and Rings | | **ASME** | SB164 | Boiler and Pressure Vessel Code Specification | | **DIN** | 2.4375 | German Standard Designation | | **EN** | NiCu30Al | European Standard | **Heat Treatment Specifications** - **Solution Annealing**: 1600-1650°F (870-900°C) followed by rapid cooling - **Aging Treatment**: 1100-1150°F (595-620°C) for 12-16 hours, furnace cooling - **Stress Relieving**: 1000-1100°F (540-595°C) for 1-2 hours, air cooling **Quality Assurance** Monel K-500 rod is supplied with complete traceability and certification, including: - Chemical analysis certificates - Mechanical test reports - Heat treatment documentation - Non-destructive testing reports (as required) **Conclusion** Monel K-500 Rod (UNS N05500) represents the optimal choice for engineers and designers seeking the perfect balance between exceptional corrosion resistance and high mechanical strength. Its unique age-hardening characteristics, combined with excellent manufacturing properties, make it indispensable for critical applications in marine, oil and gas, aerospace, and chemical processing industries where reliability and longevity are paramount.

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 1703 gallon liquid totes Special package is available on request.