Alloy K500，Monel K500 Bar(Round bar, Flat bar)，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 Bar (Round Bar, Flat Bar) / UNS N05500 - Age-Hardenable Nickel-Copper Alloy Bar** **Product Overview** Monel K-500 Bar (Round Bar and Flat Bar) in UNS N05500 is a precipitation-hardenable nickel-copper alloy that combines the excellent corrosion resistance of Monel 400 with significantly higher strength and hardness achieved through age-hardening treatment. The bar product form is specifically designed for machining, forging, and manufacturing critical components that demand superior mechanical properties and outstanding corrosion resistance in severe environments. **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) | | **Magnetic Permeability** | <1.005 (Essentially non-magnetic) | **Mechanical Properties (After Standard Aging Treatment)** *Aging Treatment: 1100°F (593°C) for 16 hours, furnace cool* | Property | Round Bar (Hot-Finished) | Flat Bar (Hot-Rolled) | |----------|------------------|----------------| | **Tensile Strength** | 965-1170 MPa (140-170 ksi) | 930-1130 MPa (135-164 ksi) | | **Yield Strength (0.2% Offset)** | 655-965 MPa (95-140 ksi) | 620-895 MPa (90-130 ksi) | | **Elongation in 2"** | 20-30% | 22-32% | | **Reduction of Area** | 35-50% | 38-55% | | **Hardness** | 25-35 HRC | 24-33 HRC | **Available Bar Forms & Sizes** **Round Bar** - Diameter Range: 1/4 inch to 12 inches (6mm to 300mm) - Condition: Hot-finished, cold-drawn, turned, ground, and polished - Length: Random mill lengths, cut to size **Flat Bar** - Thickness: 1/8 inch to 6 inches (3mm to 150mm) - Width: 1/2 inch to 12 inches (12mm to 300mm) - Condition: Hot-rolled, annealed, or hardened and tempered **Key Characteristics & Advantages** 1. **Enhanced Mechanical Properties**: Superior strength and hardness through precipitation hardening 2. **Excellent Corrosion Resistance**: Outstanding performance in seawater, sulfuric acid, hydrofluoric acid, and alkaline solutions 3. **Low Magnetic Permeability**: Maintains non-magnetic characteristics in all conditions 4. **Good Fabricability**: Excellent machinability and formability in annealed condition 5. **High Fatigue Strength**: Superior performance in cyclic loading applications 6. **Maintained Ductility**: Good toughness and impact resistance at high strength levels **Product Applications** **Marine & Offshore** - Propeller shafts and stern shafts - Marine pump shafts and valve stems - Fasteners, bolts, and studs - Boat shafting and underwater components **Oil & Gas Industry** - Drill collars and tool joints - Downhole instrument housings - Valve components and trim - Pump shafts and impellers **Aerospace & Defense** - High-strength fasteners and fittings - Actuator components - Landing gear components - Missile and radar system parts **Industrial Equipment** - Chemical processing pump shafts - Mixer shafts and agitators - Spring components - 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 **Machining & Fabrication** - **Machinability**: Approximately 20% of free-cutting brass in annealed condition - **Welding**: Readily weldable using matching filler metal; requires post-weld aging - **Forging**: Forging temperature range 1600-2100°F (870-1150°C) - **Cold Working**: Good cold working characteristics in annealed condition **Quality Assurance** All Monel K-500 bar products supplied with: - Mill Test Certificates (MTC) to ASTM/EN standards - Chemical analysis reports - Mechanical test certificates - Heat treatment documentation - Full traceability from melt to final product **Conclusion** Monel K-500 Bar (Round Bar and Flat Bar) in UNS N05500 offers an exceptional combination of high strength, excellent corrosion resistance, and good fabricability. The availability in both round and flat bar forms makes it versatile for various manufacturing requirements across marine, oil and gas, aerospace, and chemical processing industries. Its unique age-hardening capability provides designers with a material solution that delivers reliable performance in the most demanding applications.

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 1704 gallon liquid totes Special package is available on request.