Alloy 450,Monel 450,，EFORU

### **Alloy 450 / Monel® 450 (UNS N04450) - Technical Datasheet** --- #### **1. Overview** **Monel® 450** is a nickel-copper alloy specifically designed to offer a unique combination of excellent corrosion resistance, good mechanical properties, and outstanding fabricability. This alloy provides superior performance in marine environments and other corrosive media while maintaining the characteristic strength and toughness of the Monel alloy family. Its balanced composition makes it suitable for a wide range of industrial applications where reliability and durability are paramount. --- #### **2. Chemical Composition (Weight %)** The composition is optimized for corrosion resistance and mechanical properties. | Element | Content (%) | Role & Benefit | |---------|-------------|----------------| | **Nickel (Ni)** | 63.0 - 70.0 | Base element providing corrosion resistance and strength | | **Copper (Cu)** | Balance | Enhances corrosion resistance in reducing environments | | **Iron (Fe)** | 2.0 - 2.75 | Controlled for optimal corrosion resistance | | **Manganese (Mn)** | 0.50 - 1.50 | Deoxidizer and hot workability agent | | **Silicon (Si)** | 0.25 - 0.75 | Improves casting fluidity and corrosion resistance | | **Carbon (C)** | 0.15 max | Controlled for optimal strength and ductility | | **Aluminum (Al)** | 0.05 max | Controlled impurity | | **Titanium (Ti)** | 0.05 max | Controlled impurity | | **Sulfur (S)** | 0.015 max | Tightly controlled impurity | | **Magnesium (Mg)** | 0.05 - 0.15 | Grain refinement and sulfur control | *Note: "Monel" is a registered trademark of Special Metals Corporation* --- #### **3. Physical Properties** The physical properties support its use in corrosive environments. | Property | Value | |----------|-------| | **Density** | 8.80 g/cm³ (0.318 lb/in³) | | **Melting Point** | 1300-1350°C (2370-2460°F) | | **Specific Heat (20°C)** | 440 J/kg·K | | **Thermal Conductivity** | 26.5 W/m·K (at 20°C) | | **Mean Coefficient of Thermal Expansion** | 14.2 × 10⁻⁶/°C (20-300°C) | | **Electrical Resistivity** | 0.51 μΩ·m | | **Modulus of Elasticity** | 179 GPa (26.0 × 10⁶ psi) | | **Magnetic Permeability** | < 1.005 (Essentially non-magnetic) | | **Thermal Conductivity** | 26.5 W/m·K | --- #### **4. Mechanical Properties** The alloy offers excellent mechanical properties across various conditions. **Annealed Condition:** | Property | Value | |----------|-------| | **Tensile Strength** | 510-620 MPa (74-90 ksi) | | **Yield Strength (0.2% Offset)** | 240-345 MPa (35-50 ksi) | | **Elongation** | 40-50% | | **Hardness** | 75-90 HRB | | **Fatigue Strength** | 240 MPa (35 ksi) | **Hot Worked Condition:** | Property | Value | |----------|-------| | **Tensile Strength** | 580-690 MPa (84-100 ksi) | | **Yield Strength** | 380-480 MPa (55-70 ksi) | | **Elongation** | 30-40% | | **Hardness** | 85-100 HRB | --- #### **5. Product Applications** **Monel 450** serves in demanding corrosive environments across multiple industries: - **Marine & Offshore Applications:** - Marine pump shafts and impellers - Valve components in seawater service - Propeller shafts - Marine fasteners and fittings - **Chemical Processing:** - Process vessels and reactors - Heat exchangers and condensers - Piping systems for corrosive chemicals - Mixing and stirring equipment - **Oil & Gas Industry:** - Downhole tool components - Wellhead equipment - Production tubing in corrosive wells - Valve and pump components - **Power Generation:** - Feedwater heater tubes - Condenser tubes - Power plant piping systems - Desalination plant components - **Industrial Equipment:** - Fasteners and bolts for corrosive service - Springs and mechanical components - Chemical processing equipment - Pollution control equipment --- #### **6. International Standards** The material conforms to various international specifications: | Standard | Specification | |----------|---------------| | **ASTM** | ASTM B164 - Nickel-Copper Alloy Rod, Bar, and Wire
ASTM B165 - Nickel-Copper Alloy Pipe
ASTM B564 - Nickel Alloy Forgings | | **UNS** | UNS N04450 | | **ASME** | SB-164, SB-165, SB-564 | | **AMS** | AMS 4676 | | **ISO** | ISO 6208 - NiCu30Fe | | **EN** | EN 10095 - NW 4400 | --- #### **7. Corrosion Resistance** - **Excellent** resistance to seawater and marine atmospheres - **Good** performance in sulfuric, hydrochloric, and phosphoric acids - **Outstanding** resistance to alkaline solutions - **Superior** performance in salt and brackish waters - **Good** resistance to stress corrosion cracking - **Excellent** erosion corrosion resistance --- #### **8. Fabrication Characteristics** - **Machining:** Good machinability with proper tool geometry - **Welding:** Excellent weldability using GTAW, GMAW, and SMAW - **Forming:** Good hot and cold working characteristics - **Forging:** Suitable for hot forging operations - **Annealing:** 870-980°C (1600-1800°F) followed by rapid cooling - **Stress Relieving:** 540-650°C (1000-1200°F) for 1 hour per inch --- #### **9. Special Properties** - **Marine Performance:** Exceptional resistance to seawater corrosion - **Biofouling Resistance:** Good resistance to marine biological attachment - **Cavitation Resistance:** Excellent resistance to cavitation erosion - **Erosion Corrosion:** Superior performance in high-velocity fluids - **Temperature Capability:** Suitable for service up to 480°C (900°F) --- #### **10. Summary** **Monel® 450 (UNS N04450)** represents a high-performance nickel-copper alloy that delivers exceptional corrosion resistance in marine and chemical environments while maintaining excellent mechanical properties and fabricability. Its balanced composition provides reliable performance in some of the most challenging corrosive conditions, particularly in seawater service, chemical processing, and oil and gas applications. The alloy's combination of strength, toughness, and corrosion resistance, coupled with good welding and forming characteristics, makes it a versatile choice for critical components in demanding industrial applications. Governed by comprehensive international standards including ASTM B164 and ASME specifications, Monel 450 continues to be a preferred material for applications where reliability in corrosive environments is essential.

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 1724 gallon liquid totes Special package is available on request.