Alloy 405，Monel 405 Strip，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 Strip (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 Strip** offers precision dimensional control and superior machining characteristics in thin, flat-rolled form, making it ideal for high-volume production of small components requiring corrosion resistance and complex fabrication. The UNS **N04405** designation ensures consistent material quality with optimized machining performance. Supplied in coil or straight lengths, Monel 405 strip provides excellent versatility for applications requiring stamping, forming, and precision machining operations. --- ### **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 promoting the formation of manganese sulfide inclusions that act as internal chip breakers during machining operations. --- ### **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 strip: | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | Hardness (Rockwell) | | :--- | :--- | :--- | :--- | :--- | | **Annealed** | 550-690 MPa (80-100 ksi) | 240-380 MPa (35-55 ksi) | 35-45 | B65-80 | | **Quarter Hard** | 580-720 MPa (84-104 ksi) | 480-620 MPa (70-90 ksi) | 20-30 | B80-90 | | **Half Hard** | 620-760 MPa (90-110 ksi) | 550-690 MPa (80-100 ksi) | 15-25 | B85-95 | | **Full Hard** | 690-860 MPa (100-125 ksi) | 620-790 MPa (90-115 ksi) | 5-15 | B95-100 | **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 Strip | | **DIN** | 2.4362 | NiCu30FeS | | **EN** | EN 2.4362 | Nickel-Copper Alloy Strip | | **UNS** | N04405 | Alloy 405 | --- ### **Product Specifications** **Strip Specifications:** - **Thickness Range:** 0.001" to 0.125" (0.025mm to 3.175mm) - **Width Range:** 0.125" to 24" (3.175mm to 610mm) - **Length:** Coils or straight lengths - **Tolerance:** Precision rolled to tight dimensional tolerances - **Edge:** Slit edge, rolled edge, or square edge **Available Tempers:** - Annealed (Soft) - Quarter Hard - Half Hard - Full Hard - Spring Temper **Surface Finish:** - 2B Finish - Bright Annealed - Matte Finish - Special polished finishes available --- ### **Product Applications** **Electronic Components:** - Connector contacts - Spring contacts - Lead frames - Switch components - Relay parts **Electrical Applications:** - Battery contacts - Electrical springs - Shunt components - Conductive springs - Instrument components **Industrial Applications:** - Precision springs - Snap rings - Retaining rings - Washers - Small fasteners **Automotive Applications:** - Sensor components - Fuel system parts - Electrical connectors - Spring clips - Control system components **Medical Devices:** - Surgical instrument components - Spring elements - Clips and fasteners - Dental instrument parts - Medical electronics --- ### **Fabrication Advantages** **Stamping and Blanking:** - Excellent punchability and blanking characteristics - Clean, burr-free edges - Consistent dimensional stability - High-speed production capability - Minimal tool wear **Forming Characteristics:** - **Bending:** Excellent in annealed condition - **Coining:** Good for precise formed features - **Deep Drawing:** Suitable with proper tool design - **Embossing:** Good definition achievable **Machining Performance:** - **Chip Formation:** Short, broken chips - **Surface Finish:** Excellent machined surface quality - **Tool Life:** Extended tool life compared to Monel 400 - **Tapping:** Good thread formation --- ### **Recommended Fabrication Parameters** **Stamping:** - Clearance: 5-8% of material thickness - Punch Radius: 0.003-0.005 inches - Die Radius: 0.005-0.008 inches **Machining:** - Cutting Speed: 40-70 SFM - Feed Rate: 0.001-0.005 inches per revolution - Tool Material: Carbide or high-speed steel **Heat Treatment:** - Annealing Temperature: 1600-1650°F (871-899°C) - Stress Relief: 800-1000°F (427-538°C) - Quench: Rapid air or water quench --- ### **Key Advantages** - **Superior Machinability:** 50% better machining characteristics than Monel 400 - **Precision Dimensional Control:** Tight thickness and width tolerances - **Excellent Formability:** Good for complex stamped and formed parts - **Good Corrosion Resistance:** Suitable for most industrial environments - **Non-Magnetic Properties:** Essential for electronic applications - **Consistent Quality:** Uniform properties throughout coil length - **High Strength:** Good mechanical properties in various tempers - **Economic Production:** Ideal for high-volume automated manufacturing **Design Considerations:** - Not recommended for welding or high-temperature oxidizing applications - Optimal for stamped, formed, and machined components - Suitable for temperatures up to 400°C (750°F) - Excellent for spring applications in corrosive environments --- ### **Quality Assurance** **Testing and Certification:** - Chemical analysis certification - Mechanical testing verification - Dimensional accuracy certification - Surface quality inspection - Edge condition verification - Coil consistency testing Monel 405 Strip (UNS N04405) provides manufacturers with an optimal combination of superior machinability, precision dimensional control, and good corrosion resistance in strip form. Its enhanced fabrication characteristics make it particularly valuable for high-volume production of electronic components, springs, connectors, and precision mechanical parts requiring reliable performance in corrosive environments.

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 1683 gallon liquid totes Special package is available on request.