Nickel 70/Copper 30 Alloy,Nickel Copper Alloy,Ni30Cu Alloy,E FORU

### **Nickel 70/Copper 30 Alloy (Monel 400) - Nickel-Copper Alloy** #### **Overview** **Nickel 70/Copper 30 Alloy** (commercially known as **Monel 400**, UNS N04400) is a solid-solution strengthened nickel-copper alloy renowned for its excellent corrosion resistance in a wide range of environments. With approximately 67% nickel and 30% copper, this alloy demonstrates superior performance in seawater, acidic, and alkaline conditions while maintaining good mechanical properties from cryogenic temperatures to about 480°C (900°F). The material exhibits higher strength than pure nickel or copper and offers outstanding resistance to chloride-ion stress-corrosion cracking. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **63.0-70.0%** | Base element providing corrosion resistance | | **Copper (Cu)** | **28.0-34.0%** | Enhances resistance to sulfuric and hydrofluoric acids | | **Iron (Fe)** | **≤ 2.5%** | Controlled for optimal corrosion resistance | | **Manganese (Mn)** | **≤ 2.0%** | Deoxidizer and sulfur control | | **Carbon (C)** | **≤ 0.3%** | Strength enhancement | | **Silicon (Si)** | **≤ 0.5%** | Improves castability | | **Sulfur (S)** | **≤ 0.024%** | Minimized to prevent hot cracking | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **8.80 g/cm³** | | **Melting Point** | **1350°C** (2460°F) | | **Electrical Resistivity** | **51 μΩ·cm** (at 20°C) | | **Thermal Conductivity** | **22 W/m·K** (at 20°C) | | **Coefficient of Thermal Expansion** | **14.0 × 10⁻⁶/°C** (20-100°C) | | **Specific Heat Capacity** | **427 J/kg·K** | | **Tensile Strength** | **550-690 MPa** | | **Yield Strength (0.2% Offset)** | **240-345 MPa** | | **Elongation** | **35-45%** | | **Modulus of Elasticity** | **179 GPa** | | **Hardness** | **65-85 HRB** | | **Fatigue Strength** | **270 MPa** (10⁸ cycles) | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Excellent Corrosion Resistance**: Outstanding performance in seawater, sulfuric acid, hydrofluoric acid, and alkaline solutions - **Good Mechanical Properties**: Maintains strength and toughness across wide temperature range - **Resistance to Chloride Stress Corrosion Cracking**: Superior to stainless steels in chloride environments - **Good Fabricability**: Can be welded, brazed, and soldered using standard techniques - **Non-magnetic**: Useful in applications requiring non-magnetic properties **Corrosion Resistance Performance:** - **Seawater**: Excellent resistance to pitting and crevice corrosion - **Sulfuric Acid**: Good resistance up to 85% concentration at room temperature - **Hydrofluoric Acid**: One of the few metals resistant to all concentrations - **Alkaline Solutions**: Excellent resistance to caustic environments **Typical Applications:** - **Marine Engineering**: Pump shafts, propeller shafts, seawater valves, fasteners - **Chemical Processing**: Heat exchangers, reactors, distillation columns - **Oil and Gas**: Wellhead components, gathering line pipes, scrubbers - **Power Generation**: Feedwater heaters, condenser tubes - **Aerospace**: Aircraft fuel tanks, hydraulic systems - **Medical Devices**: Surgical instruments, implantable devices --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **ASTM** | **B127** | Plate, sheet, and strip | | **ASTM** | **B164** | Rod and bar | | **ASTM** | **B165** | Seamless pipe and tube | | **UNS** | **N04400** | Unified Numbering System | | **ASME** | **SB-127** | Boiler and Pressure Vessel Code | | **DIN** | **2.4360** | German standard | | **ISO** | **6208** | International standard | --- #### **Manufacturing & Processing** **Available Forms:** - **Plate & Sheet**: 0.5 mm to 100 mm thickness - **Rod & Bar**: 3 mm to 300 mm diameter - **Pipe & Tube**: 6 mm to 300 mm OD - **Wire**: 0.1 mm to 10 mm diameter - **Forgings**: Custom shapes and sizes - **Castings**: Investment and sand castings **Processing Guidelines:** - **Annealing Temperature**: 870-980°C (1600-1800°F) - **Hot Working Temperature**: 870-1175°C (1600-2150°F) - **Cold Working**: Good capability with intermediate annealing - **Welding**: All standard methods (TIG, MIG, SMAW) with matching filler metals - **Machinability**: Similar to austenitic stainless steels --- #### **Quality Control & Testing** - **Chemical Analysis**: Per ASTM E1473 - **Mechanical Testing**: Per ASTM E8/E8M - **Corrosion Testing**: Per ASTM G28 Method A - **Non-Destructive Testing**: UT, RT, PT as required - **Hydrostatic Testing**: For pressure-containing applications --- #### **Summary** **Nickel 70/Copper 30 Alloy (Monel 400)** represents one of the most versatile corrosion-resistant alloys available, combining the beneficial properties of both nickel and copper. Its exceptional performance in seawater and acidic environments, coupled with good mechanical properties and fabricability, has made it a material of choice for demanding applications in marine, chemical processing, and oil and gas industries. The alloy's proven track record over decades of service, comprehensive standardization, and reliable performance establishes it as a benchmark material for applications where corrosion resistance is paramount. Its ability to maintain integrity in some of the most aggressive environments while offering good strength and durability ensures its continued relevance in critical engineering applications worldwide.

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 3220 gallon liquid totes Special package is available on request.