Alloy 405，Monel 405 Plate，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 Plate (UNS N04405) - Product Introduction** **Overview** **Alloy 405** (Monel 405) is a free-machining nickel-copper alloy specifically formulated with controlled sulfur content to provide enhanced machinability while maintaining good corrosion resistance. **Monel 405 Plate** offers manufacturers and fabricators the ideal combination of superior machining characteristics and corrosion resistance in plate form, making it particularly suitable for applications requiring extensive machining, cutting, and fabrication operations. The UNS **N04405** designation ensures consistent material quality with optimized machining performance. Available in various thicknesses and sizes, Monel 405 plate provides excellent versatility for industrial applications where both corrosion resistance and efficient machining are critical requirements. --- ### **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 addition (0.025-0.060%) significantly improves machinability by approximately 50% compared to standard Monel 400, while maintaining good corrosion resistance in most industrial 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 plate: | Condition | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | Hardness (Rockwell B) | | :--- | :--- | :--- | :--- | :--- | | **Hot Rolled** | 550-690 MPa (80-100 ksi) | 280-410 MPa (40-60 ksi) | 30-40 | 70-85 | | **Annealed** | 550-690 MPa (80-100 ksi) | 240-380 MPa (35-55 ksi) | 35-45 | 65-80 | | **Cold Rolled** | 620-860 MPa (90-125 ksi) | 480-760 MPa (70-110 ksi) | 15-30 | 80-100 | **Machinability Rating:** 30% (Compared to 20% for Monel 400) --- ### **International Standards** | Standard Organization | Standard Number | Specification | | :--- | :--- | :--- | | **ASTM** | ASTM B127 | Standard Specification for Nickel-Copper Alloy Plate, Sheet, and Strip | | **ASME** | SB-127 | Boiler and Pressure Vessel Code | | **SAE** | AMS 4674 | Free-Machining Nickel-Copper Alloy Plate | | **DIN** | 2.4362 | NiCu30FeS | | **EN** | EN 2.4362 | Nickel-Copper Alloy Plate | | **UNS** | N04405 | Alloy 405 | --- ### **Product Specifications** **Plate Specifications:** - **Thickness Range:** 3/16" to 6" (4.8mm to 152mm) - **Width Range:** 48" to 96" (1219mm to 2438mm) - **Length Range:** 96" to 480" (2438mm to 12192mm) - **Tolerances:** Standard commercial or precision machining tolerances - **Surface Finish:** Hot rolled, annealed, or pickled **Available Conditions:** - Hot Rolled - Annealed - Stress Relieved - Solution Annealed --- ### **Product Applications** **Chemical Processing Equipment:** - Reaction vessel components - Tank linings and covers - Column internals - Mixer blades and agitators - Process chamber fabrications **Marine and Offshore:** - Shipbuilding components - Marine platform structures - Seawater handling equipment - Hull reinforcements - Deck machinery foundations **Oil and Gas Industry:** - Pressure vessel fabrication - Heat exchanger plates - Valve bodies and components - Pump casings and bases - Platform structural members **Power Generation:** - Turbine components - Generator parts - Heat exchanger plates - Structural supports - Equipment bases **Industrial Machinery:** - Machine tool components - Equipment bases and frames - Wear plates and liners - Custom fabrications - Structural supports --- ### **Machining Advantages** **Superior Machinability Characteristics:** - **Chip Formation:** Produces small, broken chips for easy disposal - **Surface Finish:** Excellent surface quality in milling and drilling operations - **Tool Life:** Extended tool life compared to Monel 400 - **Cutting Forces:** Reduced cutting forces required - **Production Efficiency:** Higher machining speeds and feeds achievable **Recommended Machining Parameters:** - **Milling Speed:** 40-70 SFM - **Drilling Speed:** 30-50 SFM - **Feed Rates:** 0.005-0.015 inches per tooth - **Tool Material:** Carbide or high-speed steel with positive rake angles - **Coolant:** Water-soluble oils recommended --- ### **Fabrication Capabilities** **Cutting and Forming:** - **Plasma Cutting:** Excellent results with proper parameters - **Waterjet Cutting:** Ideal for complex shapes - **Shearing:** Suitable for thinner plates - **Bending:** Good formability in annealed condition - **Punching:** Excellent for hole patterns and cutouts **Welding Considerations:** - **Weldability:** Requires special procedures due to sulfur content - **Filler Metal:** Monel 60 or ENiCu-7 with proper technique - **Pre-heat:** Generally not required - **Post-weld:** Stress relief may be necessary for thick sections --- ### **Key Advantages** - **Enhanced Machinability:** 50% better machining characteristics than Monel 400 - **Good Corrosion Resistance:** Suitable for seawater, acids, and alkaline solutions - **Cost-Effective Fabrication:** Reduced machining time and tooling costs - **High Strength:** Maintains mechanical properties in corrosive environments - **Non-Magnetic Properties:** Essential for applications requiring non-magnetic characteristics - **Economic Production:** Ideal for high-volume manufacturing of complex components - **Consistent Quality:** Uniform properties throughout plate thickness **Design Considerations:** - Not recommended for high-temperature oxidizing applications above 400°C - Welding requires special procedures and may affect corrosion resistance - Optimal choice for applications requiring extensive machining operations - Suitable for most corrosive services except highly oxidizing conditions --- ### **Quality Assurance** **Testing and Certification:** - Chemical analysis verification - Mechanical testing certification - Ultrasonic testing available - Dimensional verification - Surface quality inspection - Traceability documentation Monel 405 Plate (UNS N04405) provides manufacturers with the optimal balance of superior machinability and good corrosion resistance in plate form. Its enhanced machining characteristics make it particularly valuable for applications requiring extensive fabrication, complex machining operations, and reliable performance in corrosive environments across chemical processing, marine, oil and gas, and general industrial sectors.

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 1681 gallon liquid totes Special package is available on request.