Alloy 400，Monel 400 Pipe，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 Pipe (UNS N04400) - Product Introduction** **Overview** **Alloy 400** (Monel 400) is a nickel-copper alloy renowned for its exceptional corrosion resistance in a wide range of demanding environments. **Monel 400 Pipe** is specifically manufactured for fluid transport systems where reliability under corrosive conditions is paramount. This alloy maintains high strength and excellent toughness across a broad temperature range, from cryogenic to elevated temperatures up to about 540°C (1000°F), making it suitable for various industrial applications. The UNS designation **N04400** identifies this specific chemical composition. Monel 400 pipes are particularly valued for their resistance to seawater, acids, and alkaline solutions, offering superior performance where stainless steels would typically fail. --- ### **Chemical Composition** The chemical composition is carefully balanced to provide optimal corrosion resistance and mechanical properties. | 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)** | 0.024 (Maximum) | **Note:** The high nickel content provides resistance to various corrosive media, while the copper addition enhances resistance to sulfuric acid and other reducing chemicals. --- ### **Physical Properties** Monel 400 pipe exhibits consistent physical properties suitable for pressure applications. | 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 400 pipe in annealed condition: | Property | Value | | :--- | :--- | | **Tensile Strength** | 550 - 690 MPa (80 - 100 ksi) | | **Yield Strength (0.2% Offset)** | 240 - 380 MPa (35 - 55 ksi) | | **Elongation** | 35 - 45% | --- ### **International Standards** Monel 400 pipe conforms to several international standards: | Standard Organization | Standard Number | Title | | :--- | :--- | :--- | | **ASTM** | ASTM B165 | Seamless Pipe and Tube | | **ASTM** | ASTM B725/B725M | Welded Pipe | | **ASME** | SB-165 | Boiler and Pressure Vessel Code | | **ASME** | SB-725 | Welded Pipe for General Service | | **DIN** | 2.4360 | NiCu30Fe | | **UNS** | N04400 | Alloy 400 | --- ### **Product Applications** Monel 400 pipe serves critical functions in numerous industries: **Marine Engineering:** - Seawater piping systems - Ballast systems - Heat exchanger tubes - Condenser tubes - Saltwater transport lines **Chemical Processing:** - Sulfuric and hydrofluoric acid handling - Alkaline solution transport - Process piping in chemical reactors - Chlorinated solvent systems **Oil and Gas Industry:** - Feedwater heater tubes - Crude oil distillation piping - Gas processing equipment - Brine handling systems **Other Applications:** - Power generation systems - Desalination plant piping - Pharmaceutical processing equipment --- ### **Key Advantages** - **Excellent Corrosion Resistance:** Superior performance in seawater, acids, and alkaline solutions - **High Strength:** Maintains mechanical properties at elevated temperatures - **Good Fabricability:** Can be welded, bent, and formed using standard methods - **Non-Magnetic:** Suitable for applications requiring non-magnetic properties - **Proven Reliability:** Long service life in demanding environments Monel 400 Pipe (UNS N04400) represents an optimal solution for corrosive fluid transport applications where reliability and long-term performance 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 1666 gallon liquid totes Special package is available on request.