Alloy 405，Monel 405 Bar(Round bar, Flat bar)，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 Bar (Round Bar & Flat Bar) - UNS N04405** **Overview** **Alloy 405** (Monel 405) is a free-machining nickel-copper alloy specifically designed for applications requiring excellent machinability combined with good corrosion resistance. The **bar** product form, including **round bars** and **flat bars**, provides ideal stock material for manufacturing components that demand extensive machining operations while maintaining performance in corrosive environments. The controlled sulfur content in Monel 405 significantly improves machinability compared to standard Monel 400, making it particularly suitable for high-volume production of complex parts. The UNS **N04405** designation ensures consistent material quality with optimized machining characteristics. Available in various conditions and sizes, Monel 405 bars offer manufacturers the perfect balance between corrosion resistance and production efficiency. --- ### **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 | **Note:** The controlled sulfur addition creates manganese sulfide inclusions that act as internal chip breakers, providing superior machinability while maintaining good corrosion resistance. --- ### **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 bar: | Condition | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | | :--- | :--- | :--- | :--- | | **Annealed** | 550-690 MPa (80-100 ksi) | 240-380 MPa (35-55 ksi) | 35-45 | | **Hot Finished** | 550-690 MPa (80-100 ksi) | 280-410 MPa (40-60 ksi) | 30-40 | | **Cold Drawn** | 620-860 MPa (90-125 ksi) | 480-760 MPa (70-110 ksi) | 15-30 | **Machinability Rating:** 30% (Compared to 20% for Monel 400) --- ### **International Standards** | Standard Organization | Standard Number | Specification | | :--- | :--- | :--- | | **ASTM** | ASTM B164 | Nickel-Copper Alloy Rod, Bar, and Wire | | **ASME** | SB-164 | Boiler and Pressure Vessel Code | | **SAE** | AMS 4674 | Free-Machining Nickel-Copper Alloy Bars | | **DIN** | 2.4362 | NiCu30FeS | | **EN** | EN 2.4362 | Nickel-Copper Alloy Machining Bar | | **UNS** | N04405 | Alloy 405 | --- ### **Product Specifications** **Round Bar:** - **Diameter Range:** 1/8" to 12" (3mm to 300mm) - **Lengths:** Standard 12' to 20' (3.6m to 6m) - **Tolerances:** Hot rolled ±1%, Cold drawn ±0.005" - **Conditions:** Hot finished, cold drawn, annealed **Flat Bar:** - **Thickness:** 1/8" to 4" (3mm to 100mm) - **Width:** 1/2" to 12" (12mm to 300mm) - **Lengths:** Standard 10' to 20' (3m to 6m) - **Conditions:** Hot rolled, annealed --- ### **Product Applications** **Round Bar Applications:** - **Automated Machining:** Screw machine products, CNC machined components - **Valve Components:** Stems, seats, plugs, and trim pieces - **Pump Parts:** Shafts, impellers, bushings, and bearings - **Fastener Manufacturing:** Bolts, studs, nuts, and special fasteners - **Marine Components:** Propeller shafts, fittings, and hardware **Flat Bar Applications:** - **Structural Fabrication:** Brackets, supports, and frames for corrosive environments - **Machine Construction:** Wear strips, guides, and structural elements - **Processing Equipment:** Baffles, supports, and custom fittings - **Marine Architecture:** Boat fittings, railings, and structural members **Industry Applications:** - **Chemical Processing:** Equipment components, valve parts, pump components - **Marine & Offshore:** Shipbuilding components, offshore platform parts - **Oil & Gas:** Valve trim, pump parts, fasteners for corrosive service - **Power Generation:** Pump components, valve parts, fastening systems - **General Manufacturing:** Machined components for corrosive environments --- ### **Machining Advantages** - **Chip Formation:** Produces small, broken chips instead of long, stringy chips - **Surface Finish:** Excellent surface finish achievable - **Tool Life:** Extended tool life compared to Monel 400 - **Production Rates:** Higher machining speeds and feeds possible - **Consistency:** Uniform machining characteristics throughout material **Recommended Machining Parameters:** - **Cutting Speed:** 40-70 SFM for turning operations - **Feed Rate:** 0.005-0.015 inches per revolution - **Tool Material:** Carbide or high-speed steel with positive rake angles --- ### **Key Advantages** - **Enhanced Machinability:** 50% better machinability than Monel 400 - **Good Corrosion Resistance:** Suitable for most corrosive environments including seawater and acids - **Cost-Effective Production:** Reduced machining time and tooling costs - **High Strength:** Maintains mechanical properties from cryogenic to elevated temperatures - **Non-Magnetic:** Ideal for applications requiring non-magnetic properties - **Consistent Quality:** Uniform properties throughout bar cross-section - **Wide Availability:** Readily available in standard and custom sizes **Design Considerations:** - Not recommended for welding or high-temperature oxidizing applications - Suitable for temperatures up to 400°C (750°F) - Optimal choice for high-volume production of machined components - Excellent for automatic screw machines and CNC machining centers Monel 405 Bar (Round & Flat), UNS N04405 provides manufacturers with the ideal combination of superior machinability and good corrosion resistance. Its optimized composition makes it particularly valuable for cost-effective production of complex components in marine, chemical processing, and general manufacturing industries where both corrosion resistance and efficient machining are critical requirements.

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 1678 gallon liquid totes Special package is available on request.