Alloy 405，Monel 405 Pipe，UNS N04405，EFORU

British Specs:，American Specs:AMS 4674 Bar and Forgings AMS 7234 QQ-N-281 MIL-N-894，German Specs:

### **Alloy 405 / Monel 405 Pipe (UNS N04405) - Product Introduction** **Overview** **Alloy 405** (Monel 405) is a free-machining nickel-copper alloy specifically engineered for applications requiring superior machinability while maintaining good corrosion resistance. **Monel 405 Pipe** combines the excellent machining characteristics of the 405 alloy with the fluid handling capabilities of pipe products, making it ideal for corrosive service applications where custom fabrication, modification, or field machining is required. The UNS **N04405** designation identifies this specific composition with controlled sulfur content (0.025-0.060%). This sulfur addition significantly enhances machinability while maintaining adequate corrosion resistance for most industrial applications, providing an economical solution for piping systems requiring extensive fabrication. --- ### **Chemical Composition** | 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)** | 0.025 - 0.060 | **Key Feature:** The controlled sulfur content improves machinability by approximately 50% compared to standard Monel 400, while maintaining good corrosion resistance in most environments. --- ### **Physical Properties** | 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 405 pipe: | Condition | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | | :--- | :--- | :--- | :--- | | **Annealed** | 550-690 MPa (80-100 ksi) | 240-380 MPa (35-55 ksi) | 35-45 | | **As-Fabricated** | 580-720 MPa (84-104 ksi) | 280-420 MPa (41-61 ksi) | 30-40 | **Machinability Rating:** 30% (Compared to 20% for Monel 400) --- ### **International Standards** | Standard Organization | Standard Number | Specification | | :--- | :--- | :--- | | **ASTM** | ASTM B165 | Nickel-Copper Alloy Seamless Pipe and Tube | | **ASTM** | ASTM B725/B725M | Welded Nickel-Copper Alloy Pipe | | **ASME** | SB-165 | Boiler and Pressure Vessel Code | | **ASME** | SB-725 | Welded Pipe for General Corrosive Service | | **DIN** | 2.4362 | NiCu30FeS | | **UNS** | N04405 | Alloy 405 | --- ### **Product Specifications** **Pipe Specifications:** - **Size Range:** 1/8" to 24" NPS (DN6 to DN600) - **Schedule:** SCH 5S to SCH 80S - **Length:** Random (16-24 feet) or Cut Length - **Types:** Seamless and Welded - **Ends:** Plain end, Beveled end, Threaded **Manufacturing Processes:** - Seamless hot extrusion - Welded and cold worked - Annealed after fabrication - Non-destructive testing available --- ### **Product Applications** **Chemical Processing:** - Sulfuric acid handling systems - Hydrofluoric acid service - Alkaline solution transfer - Process piping requiring field modifications - Chemical injection lines **Marine Engineering:** - Shipboard piping systems - Ballast water piping - Seawater cooling lines - Marine exhaust systems - Desalination plant piping **Oil and Gas Industry:** - Production platform piping - Chemical injection systems - Process instrumentation lines - Corrosive fluid transfer - Utility service piping **Power Generation:** - Feedwater systems - Cooling water piping - Chemical treatment lines - Auxiliary system piping **Special Applications:** - Pharmaceutical processing - Food processing equipment - Semiconductor manufacturing - Pollution control systems --- ### **Machining & Fabrication Advantages** **Superior Machinability:** - Excellent chip formation - short, broken chips - Good surface finish in machining operations - Reduced tool wear compared to Monel 400 - Higher machining speeds achievable - Suitable for complex machining operations **Fabrication Characteristics:** - **Cutting:** Band saws, abrasive wheels, plasma arc - **Threading:** Excellent thread formation - **Grooving:** Clean, precise groove cutting - **Facing:** Smooth surface finish achievable - **Drilling:** Efficient chip evacuation --- ### **Key Advantages** - **Enhanced Machinability:** 50% better machining characteristics than Monel 400 - **Good Corrosion Resistance:** Suitable for seawater, acids, and alkaline solutions - **Economic Fabrication:** Reduced machining time and cost for custom installations - **Non-Magnetic Properties:** Essential for sensitive electronic environments - **Temperature Versatility:** Serviceable from cryogenic to 400°C (750°F) - **Easy Field Modification:** Ideal for applications requiring on-site adjustments - **Consistent Performance:** Reliable service in corrosive environments **Design Considerations:** - Not recommended for high-temperature oxidizing applications above 400°C - Welding requires special procedures and may affect corrosion resistance - Optimal for systems requiring frequent modifications or custom fittings - Suitable for most corrosive services except highly oxidizing conditions --- ### **Installation & Maintenance** **Installation Benefits:** - Easy field cutting and threading - Simple modification during installation - Good weldability with proper procedures - Compatibility with standard piping components **Maintenance Advantages:** - Easy modification for system changes - Simple repair and replacement - Long service life with proper maintenance - Cost-effective life cycle Monel 405 Pipe (UNS N04405) provides an optimal balance between machinability and corrosion resistance for piping systems requiring extensive fabrication, modification, or custom installation. Its superior machining characteristics make it particularly valuable for applications where field modifications are anticipated or where complex piping configurations require significant machining operations during fabrication.

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 1679 gallon liquid totes Special package is available on request.