Alloy 400，Monel 400 Fittings，UNS N04400，EFORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA11，American Specs:AMS 4574 Tube AMS 4575 (Tube *) AMS 4675 Bar and Forgings AMS 4730 Wire AMS 4731 Wire and Ribbon AMS 4544 Sheet, Strip and Plate QQ-N-281 ASTM B164，German Specs:

### **Alloy 400 / Monel 400 Fittings (UNS N04400) - Product Introduction** **Overview** **Alloy 400** (commercially known as **Monel 400**) is a nickel-copper alloy that exhibits excellent corrosion resistance and good mechanical properties in various corrosive environments. **Monel 400 Fittings** are precision-engineered components designed for connecting piping systems where reliability and corrosion resistance are paramount. These fittings maintain the excellent characteristics of Monel 400 alloy, providing durable performance in demanding applications across multiple industries. The UNS **N04400** designation ensures consistent material quality and performance. Monel 400 fittings are manufactured to precise dimensional standards, ensuring leak-proof connections and long service life in corrosive fluid handling systems. --- ### **Chemical Composition** The chemical composition is carefully controlled to maintain optimal corrosion resistance and mechanical properties. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 63.0 (Minimum) | | **Copper (Cu)** | 28.0 - 34.0 | | **Iron (Fe)** | 2.5 (Maximum) | | **Manganese (Mn)** | 2.0 (Maximum) | | **Carbon (C)** | 0.3 (Maximum) | | **Silicon (Si)** | 0.5 (Maximum) | | **Sulfur (S)** | 0.024 (Maximum) | **Note:** The balanced nickel-copper composition provides exceptional resistance to seawater, acids, and alkaline solutions, making it ideal for critical piping connections in corrosive service. --- ### **Physical Properties** Monel 400 fittings exhibit consistent physical properties suitable for pressure applications. | Property | Value | | :--- | :--- | | **Density** | 8.80 g/cm³ (0.318 lb/in³) | | **Melting Point** | 1350 °C (2460 °F) | | **Electrical Resistivity** | 51 μΩ·cm at 20°C | | **Thermal Conductivity** | 22 W/m·K at 20°C | | **Thermal Expansion Coefficient** | 13.9 μm/m·°C (20-100°C) | | **Magnetic Permeability** | Essentially non-magnetic | --- ### **Mechanical Properties** Typical mechanical properties for Monel 400 fittings: | Property | Value | | :--- | :--- | | **Tensile Strength** | 550-690 MPa (80-100 ksi) | | **Yield Strength (0.2% Offset)** | 240-380 MPa (35-55 ksi) | | **Elongation** | 35-45% | | **Hardness (Rockwell B)** | 65-80 | --- ### **International Standards** Monel 400 fittings conform to major international standards: | Standard Organization | Standard Number | Specification | | :--- | :--- | :--- | | **ASTM** | ASTM B366 | Factory-Made Wrought Fittings | | **ASME** | B16.11 | Forged Fittings, Socket-Welding and Threaded | | **ASME** | SB-366 | Specification for Factory-Made Wrought Nickel Alloy Fittings | | **MSS** | SP-43 | Wrought Stainless Steel Fittings | | **DIN** | 2.4360 | NiCu30Fe | | **ISO** | ISO 9001 | Quality Management Systems | --- ### **Product Types & Applications** **Fitting Types Available:** - Elbows (45°, 90°, 180°) - Tees (Equal & Reducing) - Reducers (Concentric & Eccentric) - Couplings - Unions - Caps - Nipples - Bushings - Crosses **Marine Applications:** - Seawater piping systems - Ballast system connections - Shipboard plumbing fittings - Offshore platform piping - Desalination plant connections **Chemical Processing:** - Acid handling systems - Chemical transfer lines - Reactor feed systems - Process instrumentation lines - Corrosive fluid handling **Oil and Gas Industry:** - Production platform piping - Refinery process lines - Chemical injection systems - Instrumentation connections - Utility service lines **Other Applications:** - Power generation plants - Pharmaceutical processing - Food processing equipment - Pollution control systems - Heat exchanger connections --- ### **Key Advantages** - **Superior Corrosion Resistance:** Excellent performance in seawater, sulfuric acid, hydrofluoric acid, and alkaline solutions - **Pressure Rating Compliance:** Manufactured to meet standard pressure ratings for reliable service - **Dimensional Accuracy:** Precision machining ensures perfect fit and leak-proof connections - **Excellent Weldability:** Can be easily welded to Monel 400 piping using matching filler metals - **Non-Magnetic Properties:** Ideal for applications requiring non-magnetic characteristics - **Long Service Life:** Proven durability reduces maintenance costs and downtime - **Temperature Versatility:** Maintains performance from cryogenic to elevated temperatures - **Wide Size Range:** Available in various sizes and configurations to meet project requirements Monel 400 Fittings (UNS N04400) provide reliable, corrosion-resistant connections for critical piping systems in marine, chemical processing, oil and gas, and other demanding industries. Their proven performance and compliance with international standards make them the preferred choice for engineers and designers specifying materials for corrosive service 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 1671 gallon liquid totes Special package is available on request.