Alloy 400，Monel 400 Rod，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 Rod (UNS N04400) - Product Introduction** **Overview** **Alloy 400**, widely known by its trade name **Monel 400**, is a nickel-copper alloy renowned for its exceptional corrosion resistance, high strength, and excellent toughness across a wide temperature range. The **rod** product form of Monel 400 is a fundamental material for machining components, shafts, fasteners, and valves that must perform reliably in some of the most aggressive environments, such as seawater, acids, and alkalis. As a solid solution strengthened alloy, it cannot be hardened by heat treatment but can be significantly strengthened through cold working. Its UNS (Unified Numbering System) designation is **N04400**. Monel 400 rod is prized for its good machinability and weldability, making it a versatile choice for engineering and manufacturing. --- ### **Chemical Composition** The chemical composition is precisely controlled to deliver the alloy's signature performance characteristics. | Element | Content (%) (Typical) | | :--- | :--- | | **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) | **Key Point:** The balanced nickel-copper composition provides excellent resistance to corrosion by seawater, sulfuric acid, and alkaline solutions, and offers immunity to chloride-ion stress-corrosion cracking. --- ### **Physical Properties** Monel 400 rod exhibits a set of physical properties that make it suitable for demanding technical applications. | Property | Value / Condition | | :--- | :--- | | **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 Response** | Essentially non-magnetic | --- ### **Mechanical Properties (Typical for Rod)** The mechanical properties of Monel 400 rod can be supplied in various tempers, from annealed to hot-finished and cold-drawn, to meet specific application requirements. | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (in 2 inches / 50mm) | | :--- | :--- | :--- | :--- | | **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% | --- ### **International Standards** Monel 400 rod is recognized and specified by major international standards organizations, ensuring material consistency and reliability. | Standard Organization | Standard Number & Title | Product Form | | :--- | :--- | :--- | | **ASTM International** | **ASTM B164** - Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire | Rod, Bar, Wire | | **ASME (American Society of Mechanical Engineers)** | **SB-164** - Identical to ASTM B164 for ASME Code use | Pressure Vessel Components | | **SAE (Aerospace Materials Spec.)** | **AMS 4676** (Hot Finished/Hot Rolled Bar) | Bar & Rod | | **UNS** | **N04400** | All Forms | | **DIN (German Standard)** | **DIN 17743** / **NiCu30Fe** (Material No. 2.4360) | All Forms | | **EN (Euronorm)** | **EN 2.4360** (NiCu30Fe) | All Forms | --- ### **Product Applications** Monel 400 rod is primarily used for manufacturing durable components through machining, forging, or direct use. Its key applications include: * **Marine & Shipbuilding:** * **Propeller Shafts:** For tugs, fishing boats, and workboats. * **Pump Shafts and Impellers:** In seawater cooling and ballast systems. * **Marine Fasteners:** Studs, bolts, and nuts resistant to seawater corrosion. * **Valve Stems and Trim:** For seawater and chemical service valves. * **Oil & Gas and Chemical Processing:** * **Process Pump Shafts:** Handling sulfuric and hydrofluoric acid. * **Fasteners and Studs:** For flanges and equipment in corrosive environments. * **Mixer Shafts:** In reactors and vessels. * **Piping Components:** Machined fittings, stems, and spools. * **General Engineering:** * **Machined Components:** Bushings, bearings, and gears for corrosive service. * **Springs:** For non-magnetic, corrosion-resistant applications. * **Feedwater Heater Tubesheets:** Machined from heavy rod or bar stock. --- ### **Key Advantages and Characteristics** * **Superior Corrosion Resistance:** Excellent resistance to seawater, sulfuric acid, phosphoric acid, and a wide range of other corrosive media. * **High Strength and Toughness:** Maintains good mechanical properties from cryogenic temperatures up to about 540°C (1000°F). * **Excellent Machinability:** It is rated as being similar to free-machining stainless steels (e.g., Type 316), producing small, broken chips. * **Good Weldability:** Can be readily welded using common techniques such as GTAW (TIG) and GMAW (MIG) with Monel 60 or ENiCu-7 filler metals. * **Non-Magnetic:** Ideal for applications requiring non-magnetic components. In summary, **Alloy 400 / Monel 400 Rod (UNS N04400)** is a high-performance, corrosion-resistant nickel-copper alloy in a form ideal for machining and fabricating critical components. Its proven track record in marine, chemical, and oil & gas industries makes it a reliable and trusted material for engineers and designers.

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 1664 gallon liquid totes Special package is available on request.