Alloy K500，Monel K500 Wire，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 Wire / UNS N05500 – Age-Hardenable Nickel-Copper Alloy Wire** **Product Overview** Monel K-500 Wire (UNS N05500) is a premium precipitation-hardenable nickel-copper alloy wire that combines the excellent corrosion resistance of Monel 400 with significantly enhanced strength and hardness achieved through age-hardening treatment. This wire product is specifically engineered for applications requiring high strength, excellent corrosion resistance, and reliable performance in demanding environments, including marine, chemical processing, aerospace, and spring applications. --- **Chemical Composition (ASTM B164)** | 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 | *Age-hardening 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) | | **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 (Wire – Aged Condition)** *Aging Treatment: 1100°F (593°C) for 16 hours, furnace cool* | Property | Solution Annealed | Age-Hardened (H900) | |-----------------------------|-------------------|---------------------| | **Tensile Strength** | 620–760 MPa | 1035–1240 MPa | | | (90–110 ksi) | (150–180 ksi) | | **Yield Strength (0.2% Offset)** | 275–415 MPa | 860–1105 MPa | | | (40–60 ksi) | (125–160 ksi) | | **Elongation in 2"** | 35–45% | 15–25% | | **Reduction of Area** | 50–65% | 30–45% | | **Hardness** | 70–85 HRB | 28–38 HRC | | **Torsional Strength** | 480 MPa (70 ksi) | 830 MPa (120 ksi) | --- **Wire Specifications & Available Forms** **Wire Types** - **Spring Wire**: High tensile for spring applications - **Welding Wire**: For joining Monel K-500 components - **Fastener Wire**: For high-strength fastener manufacturing - **Rope Wire**: For marine and industrial cable applications - **Specialty Wire**: Custom configurations for specific applications **Diameter Ranges** - **Fine Wire**: 0.025 mm to 0.5 mm (0.001" to 0.020") - **Medium Wire**: 0.5 mm to 3.0 mm (0.020" to 0.125") - **Heavy Wire**: 3.0 mm to 12.0 mm (0.125" to 0.500") - **Coil Weight**: Up to 500 kg (1100 lbs) continuous length **Temper Conditions** - Annealed (soft) - 1/4 Hard - 1/2 Hard - 3/4 Hard - Full Hard - Age-hardened --- **Key Characteristics & Advantages** 1. **High Strength-to-Weight Ratio** – Excellent mechanical properties in wire form 2. **Superior Corrosion Resistance** – Outstanding performance in seawater, acids, and alkaline environments 3. **Excellent Spring Properties** – High elastic limit and good spring characteristics 4. **Non-Magnetic Characteristics** – Essential for marine and electronic applications 5. **Good Fabricability** – Can be drawn, formed, and welded using standard techniques 6. **Age-Hardenable** – Can be strengthened after fabrication operations 7. **Fatigue Resistance** – Excellent performance in cyclic loading applications --- **Product Applications** **Spring Applications** - Marine valve springs - Chemical processing springs - Instrument springs - High-temperature springs - Corrosion-resistant springs **Marine & Offshore** - Marine cable and wire rope - Fasteners and retaining rings - Fishing gear components - Boat rigging components - Subsea equipment wires **Chemical Processing** - Filter mesh and cloth - Basket handling wires - Reactor component wires - Mixer and agitator wires - Process instrument springs **Aerospace & Defense** - Aircraft control cables - Spring components - Fastener wire - Instrumentation wires - Special purpose cables **Industrial Applications** - Screen and filter wires - Electrical connector springs - Brush springs - Lock washer springs - Precision mechanism wires --- **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 | Precipitation Hardening Nickel-Copper-Aluminum-Titanium Alloy Wire | | **AMS** | 4676 | Aerospace Material Specification | | **ASME** | SB164 | Boiler and Pressure Vessel Code Specification | | **DIN** | 2.4375 | German Standard | | **EN** | NiCu30Al | European Standard | --- **Manufacturing & Processing** **Wire Drawing** - **Process**: Multi-pass drawing with intermediate annealing - **Lubrication**: Specialized drawing compounds - **Speed**: Controlled drawing speeds for quality maintenance - **Finishing**: Final cleaning and coating as required **Heat Treatment** - **Solution Annealing**: 1600–1650°F (870–900°C) for soft condition - **Aging Treatment**: 1100–1150°F (595–620°C) for 12–16 hours - **Stress Relieving**: Low-temperature treatments for formed components **Surface Treatments** - **Pickling**: Nitric-hydrofluoric acid mixture for scale removal - **Coating**: Protective coatings available for specific applications - **Plating**: Can be plated with other metals if required - **Polishing**: Special surface finishes available --- **Quality Assurance & Testing** **Dimensional Testing** - Diameter verification using laser gauges - Ovality and straightness measurement - Surface quality inspection - Length and weight verification **Mechanical Testing** - Tensile testing from representative samples - Torsion testing for spring applications - Hardness verification - Wrap testing for ductility assessment **Special Testing** - Corrosion testing per ASTM standards - Microstructural examination - Surface contamination analysis - Spring performance testing **Certification** - Mill Test Certificates per EN 10204 3.1 - Chemical analysis certificates - Mechanical test reports - Heat treatment records - Special test certificates as required --- **Packaging & Handling** **Standard Packaging** - Plastic or wooden spools for fine wires - Steel reels for heavy wires - Coil packs for medium diameter wires - Protective wrapping against corrosion **Special Packaging** - Vacuum sealing for critical applications - Desiccant packs for moisture protection - Individual coil boxing - Custom packaging per customer requirements **Handling Instructions** - Clean, dry storage conditions - Protection from mechanical damage - Proper lifting equipment for heavy coils - Rotation of stock for long-term storage --- **Conclusion** Monel K-500 Wire (UNS N05500) offers an exceptional combination of high strength, excellent corrosion resistance, and versatile fabrication characteristics in wire form. Its age-hardening capability allows manufacturers to produce components in the soft condition and subsequently develop high strength through heat treatment, making it ideal for spring, marine, aerospace, and industrial applications where reliability and performance in corrosive environments are critical. With comprehensive international standardization and proven performance in demanding applications, Monel K-500 wire provides a trusted material solution for the most challenging wire and spring requirements.

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 1714 gallon liquid totes Special package is available on request.