Alloy 450,Monel 450 ,,E FORU

British Specs:，American Specs:，German Specs:

### **Product Datasheet: Alloy 450 / Monel® 450** **A Versatile, Non-Age-Hardenable Nickel-Copper Alloy with Excellent Fabricability** --- #### **Overview** Alloy 450 (commonly known by its trade name **Monel 450**) is a non-age-hardenable nickel-copper alloy designed to offer a excellent combination of strength, ductility, and corrosion resistance. It is a modification of the classic Monel 400 alloy, with an optimized chemical composition that provides improved resistance to corrosion in certain environments while retaining the outstanding fabrication characteristics of the nickel-copper system. Its immunity to chloride ion stress-corrosion cracking and good weldability make it a reliable and versatile choice for a wide range of industrial, marine, and chemical processing applications. --- #### **Key Features & Advantages** * **Excellent Corrosion Resistance:** Resists a wide range of corrosive environments, including seawater, hydrofluoric acid, sulfuric acid, and alkaline solutions. * **Good Strength and Toughness:** Offers a useful balance of high strength and good ductility across a wide temperature range, from cryogenic to elevated temperatures. * **Immunity to Chloride Stress Corrosion Cracking:** Unlike many austenitic stainless steels, it is not susceptible to this common failure mode. * **Excellent Fabricability:** Can be readily formed, machined, and welded using standard techniques. * **Good Thermal Conductivity:** Suitable for heat exchanger applications. * **Non-Magnetic:** Provides a non-magnetic property down to cryogenic temperatures. --- #### **Chemical Composition (Weight % - Typical)** The composition is balanced to optimize corrosion resistance and fabricability. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 63.0 - 70.0 | | **Copper (Cu)** | 26.0 - 33.0 | | **Iron (Fe)** | 2.0 - 3.0 | | **Manganese (Mn)** | 1.5 max | | **Carbon (C)** | 0.3 max | | **Silicon (Si)** | 0.5 max | | **Sulfur (S)** | 0.024 max | *Note: The higher minimum nickel content compared to Monel 400 contributes to its enhanced overall corrosion resistance.* --- #### **Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.80 g/cm³ (0.318 lb/in³) | | **Melting Point** | 1350 - 1400 °C (2460 - 2550 °F) | | **Electrical Resistivity** | ~51 μΩ·cm at 20°C | | **Thermal Conductivity** | ~21.8 W/m·K at 20°C | | **Thermal Expansion Coefficient** | 14.2 μm/m·K (20-100°C) | | **Modulus of Elasticity (Elastic)** | 179 GPa (26 x 10⁶ psi) | | **Magnetic Permeability** | **~1.0** (Essentially non-magnetic) | --- #### **Mechanical Properties (Typical)** Properties are dependent on product form and temper. **Room Temperature Properties (Annealed Condition)** * **Tensile Strength:** 550 - 690 MPa (80 - 100 ksi) * **Yield Strength (0.2% Offset):** 240 - 380 MPa (35 - 55 ksi) * **Elongation (in 2"):** 35 - 45% --- #### **International Standards** Alloy 450 is covered by several key international standards for various product forms. * **ASTM (USA):** * **ASTM B164:** Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire. * **ASTM B165:** Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube. * **UNS (Unified Numbering System):** **N05500** *Please note: UNS N05500 is more commonly associated with the age-hardenable Monel K-500. The specifications for the non-age-hardenable Monel 450 are often defined by the ASTM standards above, and it is crucial to confirm the exact chemistry and temper with the supplier.* * **DIN (Germany):** **2.4370** * **ISO (International Organization for Standardization):** **ISO 6207** (for plate, sheet, and strip). --- #### **Product Applications** Alloy 450 is used in demanding applications where its corrosion resistance and mechanical properties are required. * **Marine Engineering:** Pump shafts, propeller shafts, seawater valve trim, fasteners, and marine fixtures. * **Chemical Processing:** Equipment for handling hydrofluoric acid, sulfuric acid, and alkaline solutions; process vessels, heat exchangers, and piping systems. * **Oil and Gas Industry:** Components in offshore platforms and refining processes exposed to sour gas (H₂S) and chlorides. * **Power Generation:** Feedwater heaters, condenser tubes, and other components in fossil and nuclear power plants. * **Desalination Plants:** Heat exchanger tubes and brine heater tubing. * **Fasteners and Bolting:** High-strength, corrosion-resistant bolts, nuts, and studs. --- #### **Other / Similar Specifications & Alloys** It is important to distinguish Alloy 450 from other common nickel-copper alloys. | Alloy Name | Key Characteristics | Primary Difference from Alloy 450 | | :--- | :--- | :--- | | **Monel® 400 (Alloy 400)** | The most widely used nickel-copper alloy with excellent general corrosion resistance. | Has a lower minimum Ni content and a higher max Fe content. Alloy 450 offers marginally improved corrosion resistance in some environments. | | **Monel® K-500 (Alloy K-500)** | Age-hardenable version with significantly higher strength and hardness. | Can be heat treated to achieve much higher strength, but is more susceptible to stress-corrosion cracking in certain conditions and requires careful heat treatment. | | **Monel® 404 (Alloy 404)** | Very low magnetic permeability for electronic applications. | Has a tightly controlled, very low iron and cobalt content, making it unsuitable for the high-strength, general-purpose applications of Alloy 450. | --- **Disclaimer:** *Monel® is a registered trademark of Special Metals Corporation (a PCC company).* The information provided herein is for reference purposes only. Properties are typical and may vary based on product form, size, and processing. For critical applications, consultation with the material supplier and verification of properties for the specific lot is essential. It is crucial to confirm that "Alloy 450" refers to this specific non-age-hardenable composition, as nomenclature can vary.

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 2950 gallon liquid totes Special package is available on request.